83

Pipeline and Hazardous Materials Safety Admin., DOT § 171.6 

(b) The requirements of this subchapter for the transportation of marine pollutants are based on the provisions of Annex III of the 1973 International Convention for Prevention of 

Pollution from Ships, as modified by 

the Protocol of 1978 (MARPOL 73/78). 

(c) Exceptions. Except when all or 

part of the transportation is by vessel, 

the requirements of this subchapter 

specific to marine pollutants do not 

apply to non-bulk packagings transported by motor vehicle, rail car or aircraft.

[Amdt. 171–116, 57 FR 52934, Nov. 5, 1993, as 

amended by Amdt. 107–39, 61 FR 51337, Oct. 1, 

1996; 73 FR 4712, Jan. 28, 2008] 

§ 171.6 Control numbers under the Paperwork Reduction Act. 

(a) Purpose and scope. This section 

collects and displays the control numbers assigned to the HMR collections of 

information by the Office of Management and Budget (OMB) under the Paperwork Reduction Act of 1995. This 

section complies with the requirements 

of 5 CFR 1320.7(f), 1320.12, 1320.13 and 

1320.14 (OMB regulations implementing 

the Paperwork Reduction Act of 1995) 

for the display of control numbers assigned by OMB to collections of information of the HMR. 

(b) OMB control numbers. The table in 

paragraph (b)(2) of this section sets 

forth the control numbers assigned to 

collection of information in the HMR 

by the Office of Management and Budget (OMB) under the Paperwork Reduction Act of 1995. 

(1) Column 1 lists the OMB control 

number assigned to the HMR collections of information. Column 2 contains the Report Title of the approved 

collection of information. Column 3 

lists the part(s) or section(s) in 49 CFR 

identified or described in the collection 

of information. 

(2) Table. 

Current OMB 

control No. Title Title 49 CFR part or section where identified and described 

2137–0014 ......................... Cargo Tank Specification Requirements ............ §§ 107.503, 107.504, 178.320, 178.337, 

178.338, 178.345, 180.407, 180.409, 

180.413, 180.417. 

2137–0018 ......................... Inspection and Testing of Portable Tanks and 

Intermediate Bulk Containers.

§§ 173.24, 173.32, 178.3, 178.255, 178.273, 

178.274, 178.703, 178.801, 180.352, 

180.605.

2137–0022 ......................... Testing, Inspection, and Marking Requirements 

for Cylinders.

§§ 173.5b, 173.302a, 173.303, 173.304, 

173.309, 178.2, 178.3, 178.35, 178.44, 

178.45, 178.46, 178.57, 178.59, 178.60, 

178.61, 178.68, 180.205, 180.207, 180.209, 

180.211, 180.213, 180.215, 180.217, Appendix C to Part 180. 

2137–0034 ......................... Hazardous Materials Shipping Papers and 

Emergency Response Information.

§§ 172.200, 172.201, 172.202, 172.203, 

172.204, 172.505, 172.600, 172.602, 

172.604, 172.606, 173.6, 173.7, 173.22, 

173.56, 174.24, 174.26, 174.114, 175.30, 

175.31, 175.33, 176.24, 176.27, 176.30, 

176.36, 176.89, 177.817. 

2137–0039 ......................... Hazardous Materials Incidents Reports .............. §§ 171.15, 171.16, 171.21. 

2137–0051 ......................... Rulemaking and Special Permit Petitions ........... §§ 105.30, 105.40, 106.95, 106.110, 107.105,

107.107, 107.109, 107.113, 107.117, 

107.121, 107.123, 107.125, 107.205, 

107.211, 107.215, 107.217, 107.219, 

107.221, 107.223. 

2137–0510 ......................... RAM Transportation Requirements ..................... Part 173, Subpart I, §§ 173.22, 173.411, 

173.415, 173.416, 173.417, 173.457, 

173.471, 173.472, 173.473, 173.476. 

2137–0542 ......................... Flammable Cryogenic Liquids ............................. §§ 173.318, 177.816, 177.840, 180.405.

84

§ 171.7 49 CFR Ch. I (10–1–10 Edition) 

Current OMB 

control No. Title Title 49 CFR part or section where identified and described 

2137–0557 ......................... Approvals for Hazardous Materials §§ 107.402, 107.403, 107.405, 107.502, 

107.503, 107.705, 107.713, 107.715, 

107.717, 107.803, 107.805, 107.807, 110.30, 

172.101, 172.102, Special Provisions 19, 26, 

53, 55, 60, 105, 118, 121, 125, 129, 131, 

133, 136, B45, B55, B61, B69, B77, B81, 

N10, N72, 173.2a, 173.4, 173.7, 173.21, 

173.22, 173.24, 173.31, 173.38, 173.51, 

173.56, 173.58, 173.59, 173.124, 173.128, 

173.159, 173.166, 173.171, 173.214, 

173.222, 173.224, 173.225, 173.245, 

173.301, 173.305, 173.306, 173.314, 

173.315, 173.316, 173.318, 173.334, 

173.340, 173.411, 173.433, 173.457, 

173.471, 173.472, 173.476, 174.50, 174.63, 

175.8, 175.85, 175.701, 175.703, 176.168, 

176.340, 176.704, 178.3, 178.35, 178.47, 

178.53, 178.273, 178.274, 178.503, 178.509, 

178.605, 178.606, 178.608, 178.801, 

178.813, 180.213. 

2137–0559 ......................... (Rail Carriers and Tank Car Tank Requirements) Requirements for Rail Tank Car 

Tanks—Transportation of Hazardous Materials by Rail..

§§ 172.102, Special provisions: B45, B46, B55, 

B61, B69, B77, B78, B81; 173.10, 173.31, 

174.20, 174.50, 174.63, 174.104, 174.114, 

174.204, 179.3, 179.4, 179.5, 179.6, 179.7, 

179.11, 179.18, 179.22, 179.100–9, 179.100– 

12, 179.100–13, 179.100–16, 179.100–17, 

179.102–4, 179.102–17, 179.103–1, 179.103– 

2, 179.103–3, 179.103–5, 179.200–10, 

179.200–14, 179.200–15, 179.200–16, 

179.200–17, 179.200–19, 179.201–3, 

179.201–8, 179.201–9, 179.220–4, 179.220– 

7, 179.220–8, 179.220–13, 179.220–15, 

179.220–17, 179.220–18, 179.220–20, 

179.220–22, 179.300–3, 179.300–7, 179.300– 

9, 179.300–12, 179.300–13, 179.300–15, 

179.300–20, 179.400–3, 179.400–4, 179.400– 

11, 179.400–13, 179.400–16, 179.400–17, 

179.400–19, 179.400–20, 179.500–5, 

179.500–8, 179.500–12, 179.500–18, 

180.505, 180.509, 180.515, 180.517. 

2137–0572 ......................... Testing requirements for non-bulk packages ...... §§ 173.168, 178.2, 178.601, Appendix C to Part

178, Appendix D to Part 178. 

2137–0582 ......................... Container Certification Statement ....................... §§ 176.27, 176.172. 

2137–0586 ......................... Hazardous Materials Public Sector Training and 

Planning Grants.

Part 110. 

2137–0591 ......................... Response Plans for Shipments of Oil ................. Part 130. 

2137–0595 ......................... Cargo Tank Motor Vehicles in Liquefied Compressed Gas Service.§§ 173.315, 178.337–8, 178.337–9, 180.405, 

180.416.

2137–0612 ......................... Hazardous Materials Security Plans ................... Part 172, Subpart I, §§ 172.800, 172.802,

172.804.

2137–0613 ......................... Subsidiary Hazard Class and Number/Type of 

Packagings.

§§ 172.202, 172.203 

2137–0620 ......................... Inspection and Testing of Meter Provers ............ Part 173, Subpart A, § 173.5a. 

2137–0621 ......................... Requirements for United Nations (UN) Cylinders §§ 173.301, 173.304, 173.304b, 178.69, 178.70, 

178.74, 178.75, 180.207, 180.209, 180.212, 

180.215, 180.217. 

[Amdt. 171–111, 56 FR 66157] 

EDITORIAL NOTE: For FEDERAL REGISTER citations affecting §171.6, see the List of CFR Sections Affected which appears in the Finding Aids section of the printed volume and on GPO 

Access.

§ 171.7 Reference material. 

(a) Matter incorporated by reference—

(1) General. There is incorporated, by 

reference in parts 170–189 of this subchapter, matter referred to that is not 

specifically set forth. This matter is 

hereby made a part of the regulations 

in parts 170–189 of this subchapter. The 

matter subject to change is incorporated only as it is in effect on the 

85

Pipeline and Hazardous Materials Safety Admin., DOT § 171.7 

date of issuance of the regulation referring to that matter. The material listed in paragraph (a)(3) has been approved for incorporation by reference 

by the Director of the Federal Register 

in accordance with 5 U.S.C 552(a) and 1 

CFR part 51. Material is incorporated 

as it exists on the date of the approval 

and a notice of any change in the material will be published in the FEDERAL

REGISTER. Matters referenced by footnote are included as part of the regulations of this subchapter. 

(2) Accessibility of materials. All incorporated matter is available for inspection at: 

(i) The Office of Hazardous Materials 

Safety, Office of Hazardous Materials 

Standards, East Building, PHH–10, 1200 

New Jersey Avenue, SE., Washington, 

DC 20590–0001. For information on the 

availability of this material at PHH–10, 

call 1–800–467–4922, or go to: http://

www.phmsa.dot.gov; and 

(ii) The National Archives and 

Records Administration (NARA). For 

information on the availability of this 

material at NARA, call 202–741–6030, or 

go to: http://www.archives.gov/

federallregister/

codeloflfederallregulations/

ibrllocations.html.

(3) Table of material incorporated by 

reference. The following table sets forth 

material incorporated by reference. 

The first column lists the name and address of the organization from which 

the material is available and the name 

of the material. The second column 

lists the section(s) of this subchapter, 

other than §171.7, in which the matter 

is referenced. The second column is 

presented for information only and 

may not be all inclusive. 

Source and name of material 49 CFR reference 

Air Transport Association of America, 1301 Pennsylvania Avenue, N.W., Washington, DC 20004–1707: 

ATA Specification No. 300 Packaging of Airline Supplies, Revision 19, July 31, 1996 .................. 172.102. 

The Aluminum Association, 420 Lexington Avenue, New York, NY 10017, telephone 301–645–0756, 

http://www.aluminum.org:

Aluminum Standards and Data, Seventh Edition, June 1982 .......................................................... 172.102; 178.65.

Welding Aluminum: Theory and Practice, 2002 Fourth Edition ........................................................ 178.68 

American National Standards Institute, Inc., 25 West 43rd Street, New York, NY 10036: 

ANSI/ASHRAE 15–94, Safety Code for Mechanical Refrigeration ................................................... 173.306; 173.307.

ANSI B16.5–77, Steel Pipe Flanges, Flanged Fittings ..................................................................... 178.360–4.

ANSI N14.1 Uranium Hexafluoride—Packaging for Transport, 1971, 1982, 1987, 1990, 1995 and 

2001 Editions.

173.417; 173.420. 

American Petroleum Institute, 1220 L Street, NW, Washington, D.C. 20005–4070: 

API Recommended Practice Closures of Underground Petroleum Storage Tanks, 3rd Edition, 

March 1996.

172.102.

American Pyrotechnics Association (APA), P.O. Box 30438, Bethesda, MD 20824, (301) 907–8181, 

www.americanpyro.com:

APA Standard 87–1, Standard for Construction and Approval for Transportation of Fireworks, 

Novelties, and Theatrical Pyrotechnics, December 1, 2001 version.

173.56.

American Society of Mechanical Engineers, ASME International, 22 Law Drive, P.O. Box 2900, Fairfield, 

NJ 07007–2900, telephone 1–800–843–2763 or 1–973–882–1170, http://www.asme.org:

86

§ 171.7 49 CFR Ch. I (10–1–10 Edition) 

Source and name of material 49 CFR reference 

‘ASME Code’; ASME Code, Sections II (Parts A and B), V, VIII (Division 1), and IX of 1998 Edition of American Society of Mechanical Engineers Boiler and Pressure Vessel Code.172.102; 173.5b; 

173.24b; 173.32; 

173.306; 173.315; 

173.318; 173.420; 

178.245–1;

178.245–3;

178.245–4;

178.245–6;

178.245–7;

178.255–1;

178.255–2;

178.255–14;

178.255–15;

178.270–2;

178.270–3;

178.270–7;

178.270–9;

178.270–11;

178.270–12;

178.271–1;

178.272–1;

178.273; 178.274; 

178.276; 178.277; 

178.320; 178.337– 

1; 178.337–2; 

178.337–3;

178.337–4;

178.337–6;

178.337–16;

178.337–18;

178.338–1;

178.338–2;

178.338–3;

178.338–4;

178.338–5;

178.338–6;

178.338–13;

178.338–16;

178.338–18;

178.338–19;

178.345–1;

178.345–2;

178.345–3;

178.345–4;

178.345–7;

178.345–14;

178.345–15;

178.346–1;

178.347–1;

178.348–1;

179.400–3;

180.407.

Pipeline Transportation Systems for Liquid Hydrocarbons and other Liquids, Chapters II, III, IV, 

V and VI, ASME B31.4–1998 Edition.

173.5a.

American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 1942, telephone (610) 832–9585, http://www.astm.org:

Noncurrent ASTM Standards are available from: Engineering Societies Library, 354 East 47th 

Street, New York, NY 10017 

ASTM A 20/A 20M–93a Standard Specification for General Requirements for Steel Plates for 

Pressure Vessels.

178.337–2;

179.102–4;

179.102–1;

179.102–17.

ASTM A 47–68 Malleable Iron Castings ........................................................................................... 179.200–15.

ASTM A 53, ASTM A 53/A 53M–06a Standard Specification for Pipe, Steel, Black and HotDipped, Zinc-Coated, Welded and Seamless.173.5b.

ASTM A 106, ASTM A 106/A 106M–06a Standard Specification for Seamless Carbon Steel Pipe 

for High-Temperature Service.

173.5b.

87

Pipeline and Hazardous Materials Safety Admin., DOT § 171.7 

Source and name of material 49 CFR reference 

ASTM A 240/A 240M–99b Standard Specification for Heat-Resisting Chromium and ChromiumNickel Stainless Steel Plate, Sheet and Strip for Pressure Vessels.178.57; 178.358–5; 

179.100–7;

179.100–10;

179.102–1;

179.102–4;

179.102–17;

179.200–7;

179.201–5;

179.220–7;

179.300–7;

179.400–5.

ASTM A 242–81 Standard Specification for High-Strength Low-Alloy Structural Steel ................... 178.338–2. 

ASTM A 262–93a Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels.179.100–7;

179.200–7;

179.201–4.

ASTM A 285–78 Pressure Vessel Plates, Carbon Steel, Low- and Intermediate-Tensile Strength 179.300–7. 

ASTM A 300–58 Steel Plates for Pressure Vessels for Service at Low Temperatures .................. 178.337–2. 

ASTM A 302/A 302M–93 Standard Specification for Pressure Vessel Plates, Alloy Steel, Manganese-Molybdenum and Manganese-Molybdenum Nickel.179.100–7;

179.200–7;

179.220–7.

ASTM A 333–67 Seamless and Welded Steel Pipe for Low-Temperature Service ........................ 178.45. 

ASTM A 370–94 Standard Test 179.102–1; 179.102–4; Methods and Definitions for Mechanical 

Testing of Steel Products.

179.102–17.

ASTM A 441–81 Standard Specification for High-Strength Low-Alloy Structural Manganese Vanadium Steel.178.338–2.

ASTM A 514–81 Standard Specification for High-Yield Strength Quenched and Tempered Alloy 

Steel Plate, Suitable for Welding.

178.338–2.

ASTM A 515/A 515M–03 Standard Specification for Pressure Vessel Plates, Carbon Steel, for 

Intermediate- and Higher-Temperature Service.

179.300–7.

ASTM A 516/A 516M–90 Standard Specification for Pressure Vessel Plates, Carbon Steel, for 

Moderate and Lower-Temperature Service.

178.337–2;

179.100–7;

179.102–1;

179.102–2;

179.102–4;

179.102–17;

179.200–7;

179.220–7;

179.300–7.

ASTM A 537/A 537M–91 Standard Specification for Pressure Vessel Plates, Heat-Treated, Carbon-Manganese-Silicon Steel.179.100–7;

179.102–4;

179.102–17.

ASTM A 572–82 Standard Specification for High-Strength Low-Alloy Columbian-Vanadium 

Steels of Structural Quality.

178.338–2.

ASTM A 588–81 Standard Specification for High-Strength Low-Alloy Structural Steel with 50 Ksi 

Minimum Yield Point to 4 in. Thick.

178.338–2.

ASTM A 606–75 Standard Specification for Steel Sheet and Strip Hot- Rolled and Cold-Rolled, 

High-Strength, Low-Alloy, with Improved Atmospheric Corrosion Resistance, 1975 (Reapproved 1981).

178.338–2.

ASTM A 607–98 Standard Specification for Steel, Sheet and Strip, High-Strength, Low-Alloy, 

Columbium or Vanadium, or Both, Hot-Rolled and Cold-Rolled.

178.338–2.

ASTM A 612–72a High Strength Steel Plates for Pressure Vessels for Moderate and Lower 

Temperature Service.

178.337–2.

ASTM A 633–79a Standard Specification for Normalized High-Strength Low-Alloy Structural 

Steel, 1979 Edition.

178.338–2.

ASTM A 715–81 Standard Specification for Steel Sheet and Strip, Hot-Rolled, High-Strength, 

Low-Alloy with Improved Formability, 1981.

178.338–2.

ASTM A 1008/A 1008M—03 Standard Specification for Steel, Sheet, Cold-Rolled, Carbon, 

Structural, High-Strength Low-Alloy and High Strength Low-Alloy with Improved Formability.

178.338–2;

178.345–2

ASTM A 1011/A 1011M—03a Standard Specification for Steel, Sheet and Strip, Hot-Rolled, Carbon, Structural, High-Strength Low Alloy and High Strength Low-Alloy with Improved 

Formability.

178.338–2;

178.345–2

ASTM B 162–93a Standard Specification for Nickel Plate, Sheet, and Strip .................................. 173.249; 179.200–7. 

ASTM B 209–93 Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate ....... 179.100–7; 

179.200–7;

179.220–7.

ASTM B 221–76 Aluminum Alloy Extruded Bars, Rods, Shapes, and Tubes ................................. 178.46. 

ASTM B 557–84 Tension Testing Wrought and Cast Aluminum and Magnesium-Alloy Products .. 178.46. 

ASTM B 580–79 Standard Specification for Anodic Oxide Coatings on Aluminum, (Re-approved 

2000).

173.316; 173.318; 

178.338–17.

ASTM D 1238–90b Standard Test Method for Flow Rates of Thermoplastics for Extrusion Plastometer.173.225.

ASTM D 1709–01 Standard Text Methods for Impact Resistance of Plastic Film by the Free-Falling Dart Method.173.197.

ASTM D 1835–97 Standard Specification for Liquefied Petroleum (LP) Gases .............................. 180.209. 

88

§ 171.7 49 CFR Ch. I (10–1–10 Edition) 

Source and name of material 49 CFR reference 

ASTM D 1838–64 Copper Strip Corrosion by Liquefied Petroleum (LP) Gases ............................. 173.315. 

ASTM D 1922–00a Standard Test Method for Propogation Tear Resistance of Plastic Film and 

Thin Sheeting by Pendulum Method.

173.197.

ASTM D 4206–96 Standard Test Method for Sustained Burning of Liquid Mixtures Using the 

Small Scale Open-Cup Apparatus.

173.120.

ASTM D 4359–90 Standard Test Method for Determining Whether a Material is a Liquid or a 

Solid.

171.8.

ASTM E 8–99 Standard Test Methods for Tension Testing of Metallic Materials ........................... 178.36; 178.37; 

178.38; 178.39; 

178.44; 178.45; 

178.50; 178.51; 

178.53; 178.55; 

178.56; 178.57; 

178.58; 178.59; 

178.60; 178.61; 

178.68.

ASTM E 23–98 Standard Test Methods for Notched Bar Impact Testing of Metallic Materials ...... 178.57. 

ASTM E 112–88 Standard Test Methods for Determining Average Grain Size .............................. 178.44. 

ASTM E 112–96 Standard Test Methods for Determining Average Grain Size, 1996 Edition ........ 178.274; Part 178, 

appendix A. 

ASTM E 114–95 Standard Practice for Ultrasonic Pulse-Echo Straight-Beam Examination by the 

Contact Method.

178.45.

ASTM E 213–98 Standard Practice for Ultrasonic Examination of Metal Pipe and Tubing ............ 178.45. 

American Water Works Association, 1010 Vermont Avenue, N.W., Suite 810, Washington, DC 20005: 

AWWA Standard C207–55, Steel Pipe Flanges, 1955 ..................................................................... 178.360–4. 

American Welding Society, 550 N.W. Le Jeune Road, Miami, Florida 33126: 

AWS Code B 3.0; Standard Qualification Procedure; 1972 (FRB 3.0–41, rev. May 1973) ............. 178.356–2, 

178.358–2.

AWS Code D 1.0; Code for Welding in Building Construction (FR D 1.0–66, 1966) ...................... 178.356–2; 

178.358–2.

Association of American Railroads, American Railroads Building, 50 F Street, NW., Washington, DC 

20001; telephone (877) 999–8824, http://www.aar.org/publications.com;

89

Pipeline and Hazardous Materials Safety Admin., DOT § 171.7 

Source and name of material 49 CFR reference 

AAR Manual of Standards and Recommended Practices, Section C—Part III, Specifications for 

Tank Cars, Specification M–1002, (AAR Specifications for Tank Cars), December 2000.

173.31; 174.63; 

179.6; 179.7; 

179.15; 179.16; 

179.20; 179.22; 

179.100–9;

179.100–10;

179.100–12;

179.100–13;

179.100–14;

179.100–18;

179.101–1;

179.102–1;

179.102–4;

179.102–17;

179.103–5;

179.200–7;

179.200–9;

179.200–10;

179.200–11;

179.200–13;

179.200–17;

179.200–22;

179.201–6;

179.220–6;

179.220–7;

179.220–10;

179.220–11;

179.220–14;

179.220–18;

179.220–26;

179.300–9;

179.300–10;

179.300–15;

179.300–17;

179.400–5;

179.400–6;

179.400–8;

179.400–11;

179.400–12;

179.400–15;

179.400–18;

179.400–20;

179.400–25;

180.509; 180.513; 

180.515; 180.517. 

AAR Manual of Standards and Recommended Practices, Section I, Specially Equipped Freight 

Car and Intermodal Equipment, 1988.

174.55; 174.63. 

AAR Specifications for Design, Fabrication and Construction of Freight Cars, Volume 1, 1988 .... 179.16. 

Chlorine Institute, Inc., 1300 Wilson Boulevard, Arlington, VA 22209 

AAR Standard 286; AAR Manual of Standards and Recommended Practices, Section C, Car 

Construction Fundamentals and Details, Standard S–286, Free/Unrestricted Interchange for 

286,000 lb Gross Rail Load Cars (Adopted 2002; Revised: 2003, 2005, 2006).

179.13

Chlorine Institute Emergency Kit ‘‘A’’ for 100-lb. & 150 lb. Chlorine Cylinders (with the exception 

of repair method using Device 8 for side leaks), Edition 10, June 2003.

173.3

Chlorine Institute Emergency Kit ‘‘B’’ for Chlorine Ton Containers (with the exception of repair 

method using Device 9 for side leaks), Edition 9, June 2003.

173.3

Type 11⁄2 JQ 225, Dwg., H51970, Revision F, November 1996; or Type 11⁄2 JQ 225, Dwg. 

H50155, Revision H, November 1996.

173.315.

Section 3, Pamphlet 57, Emergency Shut-Off Systems for Bulk Transfer of Chlorine, Edition 4, 

October 2003.

177.840.

Section 3, Pamphlet 166, Angle Valve Guidelines for Chlorine Bulk Transportation, 1st Edition, 

October 2002.

178.337–9.

Standard Chlorine Angle Valve Assembly, Dwg. 104–8, July 1993 ................................................. 178.337–9. 

Excess Flow Valve with Removable Seat, Dwg. 101–7, July 1993 ................................................. 178.337–8. 

Excess Flow Valve with Removable Basket, Dwg. 106–6, July 1993 .............................................. 178.337–8. 

Standards for Housing and Manway Covers for Steel Cargo Tanks, Dwgs. 137–1 and 137–2, 

September 1, 1982.

178.337–10.

Typical Manway Arrangement Chlorine Cargo Tank, Dwg 137–5, November 1996 ....................... 178.337–10. 

Canadian General Standards Board, Place du Portage III, 6B1 11 ............................................................... 171.12

Laurier Street, Gatineau, Quebec, Canada K1A 1G6 

National Standard of Canada (CAN/CGSB 43.147—2005) Construction, Modification, Qualification, Maintenance, and Selection and Use of Means of Containment for the Handling, Offering 

for Transport, or Transportation of Dangerous Goods by Rail.

90

§ 171.7 49 CFR Ch. I (10–1–10 Edition) 

Source and name of material 49 CFR reference 

CGA Pamphlet C–3, Standards for Welding on Thin-Walled Steel Cylinders, 1994 ....................... 178.47; 178.50; 

178.51; 178.53; 

178.55; 178.56; 

178.57; 178.58; 

178.59; 178.60; 

178.61; 178.65; 

178.68; 180.211. 

CGA C–5, Cylinder Service Life—Seamless Steel High Pressure Cylinders, 1991 (reaffirmed 

1995).

173.302a.

CGA Pamphlet C–6, Standards for Visual Inspection of Steel Compressed Gas Cylinders, 1993 173.3, 173.198, 

180.205, 180.209, 

180.211, 180.411, 

180.519.

CGA Pamphlet C–6.1, Standards for Visual Inspection of High Pressure Aluminum Compressed 

Gas Cylinders, 2002, Fourth Edition.

180.205; 180.209 

CGA Pamphlet C–6.2, Guidelines for Visual Inspection and Requalification of Fiber Reinforced 

High Pressure Cylinders, 1996, Third Edition.

180.205.

CGA Pamphlet C–6.3, Guidelines for Visual Inspection and Requalification of Low Pressure Aluminum Compressed Gas Cylinders, 1991.180.205; 180.209. 

CGA C–7, Guide to Preparation of Precautionary Labeling and Marking of Compressed Gas 

Containers, Appendix A, issued 2004 (8th Edition).

172.400a.

CGA Pamphlet C–8, Standard for Requalification of DOT-3HT Cylinder Design, 1985 .................. 180.205; 180.209. 

CGA Pamphlet C–11, Recommended Practices for Inspection of Compressed Gas Cylinders at 

Time of Manufacture, 2001, Third Edition.

178.35.

CGA Pamphlet C–12, Qualification Procedure for Acetylene Cylinder Design, 1994 ...................... 173.301; 173.303; 

178.59; 178.60. 

CGA Pamphlet C–13, Guidelines for Periodic Visual Inspection and Requalification of Acetylene 

Cylinders, 2000, Fourth Edition.

173.303; 180.205; 

180.209.

CGA Pamphlet C–14, Procedures for Fire Testing of DOT Cylinder Pressure Relief Device Systems, 1979.173.301; 173.323. 

CGA Pamphlet G–2.2, Guideline Method for Determining Minimum of 0.2% Water in Anhydrous 

Ammonia, 1985, Second Edition, Reaffirmed 1997.

173.315.

CGA Pamphlet G–4.1, Cleaning Equipment for Oxygen Service, 1985 .......................................... 178.338–15. 

CGA Pamphlet P–20, Standard for the Classification of Toxic Gas Mixtures, 2003, Third Edition ............... 173.115. 

CGA Pamphlet P–20, Standard for the Classification of Toxic Gas Mixtures, 1995 ....................... 173.115. 

CGA S–1.1, Pressure Relief Device Standards—Part 1—Cylinders for Compressed Gases, 2005 

(with the exception of paragraph 9.1.1.1), Twelfth Edition.

173.301, 173.304a 

178.75.

CGA Pamphlet S–1.2, Safety Relief Device Standards Part 2—Cargo and Portable Tanks for 

Compressed Gases, 1980.

173.315; 173.318; 

178.276; 178.277. 

CGA S–7, Method for Selecting Pressure Relief Devices for Compressed Gas Mixtures in Cylinders, 2005.173.301.

CGA Technical Bulletin TB–2, Guidelines for Inspection and Repair of MC–330 and MC–331 

Cargo Tanks, 1980.

180.407; 180.413. 

CGA Technical Bulletin TB–25, Design Considerations for Tube Trailers, 2008 Edition ................. 173.301. 

Department of Defense (DOD), 2461 Eisenhower Avenue, Alexandria, VA 22331: 

DOD TB 700–2; NAVSEAINST 8020.8B; AFTO 11A–1–47; DLAR 8220.1: Explosives Hazard 

Classification Procedures, January 1998.

173.56.

Packaging of Hazardous Material, DLAD 4145.41/ AR 700–143/AFJI 24–210/NAVSUPINST 

4030.55B/MCO 4030.40B, January 14, 2000.

173.7

Department of Energy (USDOE), 100 Independence Avenue SW., Washington, DC 20545: 

USDOE publications available from: Superintendent of Documents, Government Printing Office 

(GPO) or The National Technical Information Service (NTIS). 

USDOE, CAPE–1662, Revision 1, and Supplement 1, Civilian Application Program Engineering 

Drawings, April 6, 1988.

178.356–1;

178.356–2;

178.358–1;

178.358–2;

178.358–3;

178.358–4.

USDOE, Material and Equipment Specification No. SP–9, Rev. 1, and Supplement—Fire Resistant Phenolic Foam, March 28, 1968.178.356–2;

178.358–2.

USDOE, KSS–471, November 30, 1986—Proposal for Modifications to U.S. Department of 

Transportation Specification 21PF–1, Fire and Shock Resistant Phenolic Foam—Insulated 

Metal Overpack.

178.358–1;

178.358–3.

General Services Administration, Specification Office, Room 6662, 7th and D Street, S.W., Washington, 

DC 20407: 

Federal Specification RR-C–901D, Cylinders, Compressed Gas: Seamless Shatterproof, High 

Pressure DOT 3AA Steel, and 3AL Aluminum, February 21, 2003 (Superseding RR-C–901C, 

1981).

173.302; 173.336; 

173.337.

Institute of Makers of Explosives, 1120 19th Street NW., Suite 310, Washington, DC 20036–3605: 

IME Safety Library Publication No. 22 (IME Standard 22), Recommendation for the Safe Transportation of Detonators in a Vehicle with Certain Other Explosive Materials, May 1993.173.63; 177.835. 

International Atomic Energy Agency (IAEA), P.O. Box 100, Wagramer Strasse 5, A–1400 Vienna, Austria: 

91

Pipeline and Hazardous Materials Safety Admin., DOT § 171.7 

Source and name of material 49 CFR reference 

Also available from: Bernan Associates, 4611–F Assembly Drive, Lanham, MD 20706–4391, 

USA; or Renouf Publishing Company, Ltd., 812 Proctor Avenue, Ogdensburg, New York 

13669, USA. 

IAEA, Regulations for the Safe Transport of Radioactive Material, (IAEA Regulations), 1996 Edition (Revised), No. TS-R-1 (ST-1, Revised).171.22; 171.23; 

171.26, 173.415, 

173.416, 173.417, 

173.473

International Civil Aviation Organization (‘‘ICAO’’), 999 University Street, Montre ́al, Quebec H3C 5H7, 

Canada, 1–514–954–8219, http://www.icao.int:

ICAO Technical Instructions available from: INTEREG, International Regulations, Publishing and 

Distribution Organization, P.O. Box 60105, Chicago, IL 60660. 

Technical Instructions for the Safe Transport of Dangerous Goods by Air (‘‘ICAO Technical Instructions’’), 

2009–2010 Edition.

171.8; 171.22; 

171.23; 171.24; 

172.202; 172.401; 

172.512; 172.602; 

173.56; 173.320; 

175.33; 178.3. 

International Electrotechnical Commission (IEC) 3, rue de Varembe ́, P.O. Box 131, CH—1211, GENEVA 

20, Switzerland: 

Fuel cell technologies—Part 6–1: Micro fuel cell power systems—Safety, IEC/PAS 62282–6– 

1:2006(E), First Edition 2006–02, with Corrigendum 1, First Edition 2007–04.

§ 175.10. 

International Maritime Organization (‘‘IMO’’), 4 Albert Embankment, London, SE1 7SR, United Kingdom 

or New York Nautical Instrument & Service Corporation, 140 West Broadway, New York, NY 10013, 

+44 (0) 20 7735 7611, http://www.imo.org:

International Convention for the Safety of Life at Sea, (‘‘SOLAS’’) 176.63, 176.84. Amendments 2002, 

Chapter II–2/Regulation 19, Consolidated Edition 2004..

International Maritime Dangerous Goods Code (‘‘IMDG Code’’), 2008 Edition, Incorporating Amendment 

34–08 (English Edition), Volumes 1 and 2.

171.22; 171.23; 

171.25; 172.101 

Appendix B; 

172.202; 172.401; 

172.502; 172.602; 

173.21; 173.56; 

176.2; 176.5; 

176.11; 176.27; 

176.30; 176.84; 

178.3; 178.274. 

International Organization for Standardization, Case Postale 56, CH–1211, Geneve 20, Switzerland, 

http://www.iso.org:

Also available from: ANSI 25, West 43rd Street, New York, NY 10036, 1–212–642–4900, http://

www.ansi.org.

ISO 535–1991(E) Paper and board—Determination of water absorptiveness—Cobb method ....... 178.516; 178.707; 

178.708.

ISO 1496–1: 1990 (E)—Series 1 freight containers—Specification and testing, Part 1: General 

cargo containers. Fifth Edition, (August 15, 1990).

173.411

ISO 1496–3—Series 1 freight containers—Specification and testing—Part 3: Tank containers for 

liquids, gases and pressurized dry bulk, Fourth edition, March 1995, (E).

178.74; 178.75; 

178.274.

ISO 2431–1984(E) Standard Cup Method ........................................................................................ 173.121.

ISO 2592–1973(E) Petroleum products—Determination of flash and fire points—Cleveland open 

cup method.

173.120.

ISO 2919–1980(E) Sealed radioactive sources—Classification ....................................................... 173.469. 

ISO 3036–1975(E) Board—Determination of puncture resistance ................................................... 178.708. 

ISO 3574–1986(E) Cold-reduced carbon steel sheet of commercial and drawing qualities ............ 178.503; Part 178, 

appendix C. 

ISO 3807–2, Cylinders for acetylene—Basic requirements—Part 2: Cylinders with fusible plugs, 

First edition, March 2000, (E).

173.303; 178.71. 

ISO 4126–1 Safety valves—Part 1: General Requirements, December 15, 1991, First Edition ..... 178.274. 

ISO 6406, Gas cylinders—Seamless steel gas cylinders—Periodic inspection and testing, Second edition, February 2005, (E).180.207.

ISO 6892 Metallic materials—Tensile testing, July 15, 1984, First Edition ...................................... 178.274. 

ISO 7225, Gas cylinders—Precautionary labels, Second Edition, July 2005, (E) ........................... 178.71. 

ISO 7866, Gas cylinders—Refillable seamless aluminum alloy gas cylinders—Design, construction and testing, First edition, June 1999, (E).178.71.

ISO 8115 Cotton bales—Dimensions and density, 1986 Edition ..................................................... 172.102. 

ISO 9809–1: Gas cylinders—Refillable seamless steel gas cylinders—Design, construction and 

testing—Part 1: Quenched and tempered steel cylinders with tensile strength less than 1 100 

MPa., First edition, June 1999, (E).

178.37; 178.71; 

178.75.

ISO 9809–2: Gas cylinders—Refillable seamless steel gas cylinders—Design, construction and 

testing—Part 2: Quenched and tempered steel cylinders with tensile strength greater than or 

equal to 1 100 MPa., First edition, June 2000, (E).

178.71; 178.75. 

ISO 9809–3: Gas cylinders—Refillable seamless steel gas cylinders—Design, construction and 

testing—Part 3: Normalized steel cylinders, First edition, December 2000, (E).

178.71; 178.75. 

ISO 9978:1992(E)—Radiation protection—Sealed radioactive sources—Leakage test methods. 

First Edition, (February 15, 1992).

173.469.

92

§ 171.7 49 CFR Ch. I (10–1–10 Edition) 

Source and name of material 49 CFR reference 

ISO 10156:1996, Gases and Gas Mixtures—Determination of fire potential and oxidizing ability for the selection of cylinder valve outlets, Second edition, February 1996 (E).173.115.

ISO 10156–2:2005, Gas cylinders—Gases and gas mixtures—Part 2: Determination of oxidizing ability of 

toxic and corrosive gases and gas mixtures, First edition, August 2005, (E).

173.115.

ISO 10297, Gas cylinders—Refillable gas cylinder valves—Specification and type testing, First 

edition, May 1999, (E).

173.301b, 178.71. 

ISO 10461, Gas cylinders—Seamless aluminum—alloy gas cylinders—Periodic inspection and 

testing, Second edition, February 2005, (E).

180.207.

ISO 10462, Gas cylinders—Transportable cylinders for dissolved acetylene—Periodic inspection 

and maintenance, Second edition, February 2005, (E).

180.207.

ISO 11114–1, Transportable gas cylinders—Compatibility of cylinder and valve materials with 

gas contents—Part 1: Metallic materials, First edition, October 1997, (E).

173.301b; 178.71. 

ISO 11114–2, Transportable gas cylinders—Compatibility of cylinder and valve materials with 

gas contents—Part 2: Non-metallic materials, First edition, December 2000, (E).

173.301b; 178.71. 

ISO 11117, Gas cylinders—Valve protection caps and valve guards for industrial and medical 

gas cylinders—Design, construction and tests, First edition, August 1998, (E).

173.301b.

ISO 11118, Gas cylinders—Non-refillable metallic gas cylinders—Specification and test methods, 

First edition, October 1999, (E).

178.71.

ISO 11119–1, Gas cylinders—Gas cylinders of composite construction—Specification and test 

methods—Part 1: Hoop-wrapped composite gas cylinders, First edition, May 2002, (E).

178.71.

ISO 11119–2, Gas cylinders—Gas cylinders of composite construction—Specification and test 

methods—Part 2: Fully wrapped fibre reinforced composite gas cylinders with load-sharing 

metal liners, First edition, May 2002, (E).

178.71.

ISO 11119–3, Gas cylinders of composite construction—Specification and test methods—Part 3: 

Fully wrapped fibre reinforced composite gas cylinders with non-load-sharing metallic or nonmetallic liners, First edition, September 2002, (E).

178.71.

ISO 11120, Gas cylinders—Refillable seamless steel tubes of water capacity between 150 L and 

3000 L—Design, construction and testing, First edition, March 1999, (E).

178.71; 178.75. 

ISO 11621, Gas cylinders—Procedures for change of gas service, First edition, April 1997, (E) .. 173.302, 173.336, 

173.337.

ISO 11623, Transportable gas cylinders—Periodic inspection and testing of composite gas cylinders, First edition, March 2002, (E).180.207.

National Board of Boiler and Pressure Vessel Inspectors, 1055 Crupper Avenue, Columbus, Ohio 43229: 

National Board Inspection Code, A Manual for Boiler and Pressure Vessel Inspectors, NB–23, 

1992 Edition.

180.413.

National Fire Protection Association, Batterymarch Park, Quincy, MA 02269: 

NFPA 58-Liquefied Petroleum Gas Code, 2001 Edition ................................................................... 173.315. 

National Institute of Standards and Technology, Department of Commerce, 5285 Port Royal Road, 

Springfield, VA 22151: 

USDC, NBS Handbook H–28 (1957), 1957 Handbook of Screw-Thread Standards for Federal 

Services, December 1966 Edition.

179.2; 178.45; 

178.46.

Organization for Economic Cooperation and Development (OECD), OECD Publications and Information 

Center, 2001 L Street, N.W., Suite 700, Washington, DC 20036: 

OECD Guideline for Testing of Chemicals, No. 404 ‘‘Acute Dermal Irritation/Corrosion,’’ 1992 ..... 173.137. 

Transport Canada, TDG Canadian Government Publishing Center, Supply and Services, Canada, Ottawa, Ontario, Canada K1A 059, 416–973–1868, http://www.tc.gc.ca:

Transportation of Dangerous Goods Regulations (Transport Canada TDG Regulations), August 

2001 including Clear Language Amendments SOR 2001–286, Amendment 1 (SOR/2002–306) 

August 8, 2002; Amendment 2 (SOR/2003–273) July 24, 2003; Amendment 3 (SOR/2003– 

400) December 3, 2003; Amendment 4 (SOR/2005–216) July 13, 2005; Amendment 5 (SOR/ 

2005–279) September 21, 2005; and subsection 4.18(5) of Amendment 6 (SOR/2008–34) 

February 7, 2008.

171.12; 171.22; 

171.23; 172.401; 

172.502; 172.519; 

172.602; 173.31; 

173.32; 173.33. 

Truck Trailer Manufacturers Association, 1020 Princess Street, Alexandria, Virginia 22314: 

TTMA RP No. 61–98, Performance of manhole and/or Fill Opening Assemblies on MC 306, 

DOT 406, Non-ASME MC 312 and Non-ASME DOT 412 Cargo Tanks, June 1, 1998.

180.405.

TTMA RP No. 81–97, Performance of Spring Loaded Pressure Relief Valves on MC 306, MC 

307, MC 312, DOT 406, DOT 407, and DOT 412 Tanks, July 1, 1997 Edition.

178.345–10;

178.346–3.

TTMA TB No. 107, Procedure for Testing In-Service Unmarked and/or Uncertified MC 306 and 

Non-ASME MC 312 Type Cargo Tank Manhole Covers, June 1, 1998 Edition.

180.405.

United Nations, Publications, 2 United Nations Plaza, Room DC2–853, New York, NY 10017, 1–212– 

963–8302, http://unp.un.org.

UN Recommendations on the Transport of Dangerous Goods, Fifteenth revised edition (2007). Volumes I 

and II.

171.8; 171.12; 

171.22; 171.23; 

172.202; 172.401; 

172.502; 173.22; 

173.24; 173.24b; 

173.40; 173.56; 

173.192; 173.197; 

173.302b;

173.304b; 178.75; 

178.274; 178.801. 

93

Pipeline and Hazardous Materials Safety Admin., DOT § 171.7 

Source and name of material 49 CFR reference 

UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, Fourth revised edition, (2003), and Addendum 2, (2004).172.102; 173.21; 

173.56; 173.57; 

173.58; 173.115; 

173.124; 173.125; 

173.127; 173.128; 

173.137; 173.185; 

Part 173, appendix H; 178.274. 

United States Enrichment Corporation, Inc. (USEC): 

USEC Inc., 6903 Rockledge Drive, Bethesda, MD 20817.

USEC–651—Good Handling Practices for Uranium Hexafluoride, Revision 8, January 1999 ........ 173.417 

(b) List of informational materials not 

requiring incorporation by reference. The

materials listed in this paragraph do 

not require approval for incorporation 

by reference and are included for informational purposes. These materials 

may be used as noted in those sections 

in which the material is referenced. 

Source and name of material 49 CFR reference 

American Biological Safety Association 

1202 Allanson Road, Mundelein, IL 60060 

Risk Group Classification for Infectious Agents, 1998 .................................................................................... 173.134 

American Institute of Chemical Engineers (AIChE),

3 Park Avenue New York, NY 10016–5991 

Process Safety Progress Journal, Vol. 21, No. 2.

Example of a Test Method for Venting Sizing: OPPSD/SPI Methodology ..................................................... Note to § 173. 

225(h)(3)(vi).

American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428: 

Noncurrent ASTM Standards are available from: Engineering Societies Library, 354 East 47th Street, 

New York, NY 10017 

ASTM E 380–89 Standards for Metric Practice .............................................................................................. 171.10 

Association of American Railroads, 

American Railroads Building, 50 F Street, NW., Washington, DC 20001 

AAR Catalog Nos. SE60CHT; SE60CC; SE60CHTE; SE60CE; SE60DC; SE60DE ..................................... 179.14 

AAR Catalog Nos. SE67CC; SE67CE; SE67BHT; SE67BC; SE67BHTE; SE67BE ...................................... 179.14 

AAR Catalog Nos. SE68BHT; SE68BC; SE68BHTE; SE68BE ...................................................................... 179.14 

AAR Catalog Nos. SE69AHTE; SE69AE ........................................................................................................ 179.14 

AAR Catalog Nos. SF70CHT; SF70CC; SF70CHTE; SF70CE ...................................................................... 179.14 

AAR Catalog Nos. SF73AC; SF73AE; SF73AHT; SF73AHTE ....................................................................... 179.14

AAR Catalog Nos. SF79CHT; SF79CC; SF79CHTE; SF79CE ...................................................................... 179.14 

Bureau of Explosives, 

Hazardous Materials Systems (BOE), Association of American Railroads, American Railroads Building, 50 F Street, NW., Washington, DC 20001 

Fetterley’s Formula (The Determination of the Relief Dimensions for Safety Valves on Containers in 

which Liquefied gas is charged and when the exterior surface of the container is exposed to a temperature of 1,200 °F.).

173.315

Pamphlet 6, Illustrating Methods for Loading and Bracing Carload and Less-Than-Carload Shipments of 

Explosives and Other Dangerous Articles, 1962.

174.55; 174.101; 

174.112; 174.115; 

174.290

Pamphlet 6A (includes appendix No. 1, October 1944 and appendix 2, December 1945), Illustrating Methods for Loading and Bracing Carload and Less-Than-Carload Shipments of Loaded Projectiles, Loaded 

Bombs, etc., 1943.

174.101; 174.290 

Pamphlet 6C, Illustrating Methods for Loading and Bracing Trailers and Less-Than-Trailer Shipments of 

Explosives and Other Dangerous Articles Via Trailer-on-Flatcar (TOFC) or Container-on-Flatcar 

(COFC), 1985.

174.55; 174.63; 

174.101; 174.112; 

174.115

Emergency Handling of Hazardous Materials in Surface Transportation, 1989 ............................................. 171.7 

Centers for Disease Control and Prevention 

1600 Clifton Road, Atlanta, GA 30333 

Biosafety in Microbiological and Biomedical Laboratories, Fourth Edition, April 1999 ................................... 173.134 

Compressed Gas Association, Inc., 4221 Walney Road, 5th Floor, Chantilly, Virginia 20151 

CGA C–1.1, Personnel Training and Certification Guidelines for Cylinder Requalification By the Volumetric Expansion Method, 2004, First Edition.180.209

National Institutes of Health 

Bethesda, MD 20892 

NIH Guidelines for Research Involving Recombinant DNA Molecules (NIH Guidelines), January 2001, Appendix B.173.134

Pantone Incorporated 

590 Commerce Boulevard, Carlstadt, New Jersey 07072–3098 

Pantone ® Formula guide coated/uncoated, Second Edition 2004 ................................................................. 172.407, 172.519

94

§ 171.8 49 CFR Ch. I (10–1–10 Edition) 

Source and name of material 49 CFR reference 

Society of Plastics Industries, Inc., 

Organic Peroxide Producers Safety Division, 1275 K Street, NW., Suite 400, Washington, DC 20005 

Self Accelerating Decomposition Temperature Test, 1972 ............................................................................. 173.21 

Truck Trailer Manufacturers Association, 

1020 Princess Street, Alexandria, Virginia 22314, telephone (703) 549–3010, http://www.ttmanet.org:

TTMA RP No. 96–01, TTMA RP No. 96–01, Structural Integrity of DOT 406, DOT 407, and DOT 412 Cylindrical Cargo Tanks, January 2001 Edition.178.345–3

[Amdt. 171–111, 55 FR 52466, Dec. 21, 1990; 71 FR 78611, Dec. 29, 2006; 75 FR 69, Jan. 4, 2010] 

EDITORIAL NOTE: For FEDERAL REGISTER citations affecting §171.7, see the List of CFR Sections Affected which appears in the Finding Aids section of the printed volume and on GPO 

Access.

EDITORIAL NOTE: At 68 FR 19273, Apr. 18, 2003, §171.7(a)(3) was amended by removing the 

entry for ‘‘TTMA TB No. 81’’ under ‘‘Truck Trailer Manufacturers Association’’. The amendment could not be incorporated because that entry does not exist. 

§ 171.8 Definitions and abbreviations. 

In this subchapter, 

Administrator means the Administrator, Pipeline and Hazardous Materials Safety Administration. 

Aerosol means any non-refillable receptacle containing a gas compressed, 

liquefied or dissolved under pressure, 

the sole purpose of which is to expel a 

nonpoisonous (other than a Division 6.1 

Packing Group III material) liquid, 

paste, or powder and fitted with a selfclosing release device allowing the contents to be ejected by the gas. 

Aggregate lithium content means the 

sum of the grams of lithium content or 

equivalent lithium content contained 

by the cells comprising a battery. 

Agricultural product means a hazardous material, other than a hazardous waste, whose end use directly 

supports the production of an agricultural commodity including, but not 

limited to a fertilizer, pesticide, soil 

amendment or fuel. An agricultural

product is limited to a material in 

Class 3, 8 or 9, Division 2.1, 2.2, 5.1, or 

6.1, or an ORM-D material. 

Approval means a written authorization, including a competent authority 

approval, from the Associate Administrator or other designated Department 

official, to perform a function for 

which prior authorization by the Associate Administrator is required under 

subchapter C of this chapter (49 CFR 

parts 171 through 180.) 

Approved means approval issued or 

recognized by the Department unless 

otherwise specifically indicated in this 

subchapter.

Asphyxiant gas means a gas which dilutes or replaces oxygen normally in 

the atmosphere. 

Associate Administrator means the Associate Administrator for Hazardous 

Materials Safety, Pipeline and Hazardous Materials Safety Administration.

Atmospheric gases means air, nitrogen, oxygen, argon, krypton, neon and 

xenon.

Authorized Inspection Agency means:

(1) A jurisdiction which has adopted 

and administers one or more sections 

of the ASME Boiler and Pressure Vessel Code as a legal requirement and has 

a representative serving as a member 

of the ASME Conference Committee; or 

(2) an insurance company which has 

been licensed or registered by the appropriate authority of a State of the 

United States or a Province of Canada 

to underwrite boiler and pressure vessel insurance in such State or Province.

Authorized Inspector means an Inspector who is currently commissioned by 

the National Board of Boiler and Pressure Vessel Inspectors and employed as 

an Inspector by an Authorized Inspection Agency. 

Bag means a flexible packaging made 

of paper, plastic film, textiles, woven 

material or other similar materials. 

Bar means 1 BAR = 100 kPa (14.5 psi). 

Barge means a non-selfpropelled vessel.

Biological product. See §173.134 of this 

subchapter.

Biological substances, Category B. See

§173.134 of this subchapter. 

95

Pipeline and Hazardous Materials Safety Admin., DOT § 171.8 

Bottle means an inner packaging having a neck of relatively smaller cross 

section than the body and an opening 

capable of holding a closure for retention of the contents. 

Bottom shell means that portion of a 

tank car tank surface, excluding the 

head ends of the tank car tank, that 

lies within two feet, measured circumferentially, of the bottom longitudinal 

center line of the tank car tank. 

Box means a packaging with complete rectangular or polygonal faces, 

made of metal, wood, plywood, reconstituted wood, fiberboard, plastic, or 

other suitable material. Holes appropriate to the size and use of the packaging, for purposes such as ease of handling or opening, or to meet classification requirements, are permitted as 

long as they do not compromise the integrity of the packaging during transportation, and are not otherwise prohibited in this subchapter. 

Break-bulk means packages of hazardous materials that are handled individually, palletized, or unitized for purposes of transportation as opposed to 

bulk and containerized freight. 

Btu means British thermal unit. 

Bulk packaging means a packaging, 

other than a vessel or a barge, including a transport vehicle or freight container, in which hazardous materials 

are loaded with no intermediate form 

of containment. A Large Packaging in 

which hazardous materials are loaded 

with an intermediate form of containment, such as one or more articles or 

inner packagings, is also a bulk packaging. Additionally, a bulk packaging 

has: * * * 

(1) A maximum capacity greater than 

450 L (119 gallons) as a receptacle for a 

liquid;

(2) A maximum net mass greater 

than 400 kg (882 pounds) and a maximum capacity greater than 450 L (119 

gallons) as a receptacle for a solid; or 

(3) A water capacity greater than 454 

kg (1000 pounds) as a receptacle for a 

gas as defined in §173.115 of this subchapter.

Bundle of cylinders means assemblies 

of UN cylinders fastened together and 

interconnected by a manifold and 

transported as a unit. The total water 

capacity for the bundle may not exceed 

3,000 L, except that a bundle intended 

for the transport of gases in Division 

2.3 is limited to a water capacity of 

1,000 L. 

Bureau of Explosives means the Bureau of Explosives (B of E) of the Association of American Railroads. 

C means Celsius or Centigrade. 

Captain of the Port (COTP) means the 

officer of the Coast Guard, under the 

command of a District Commander, so 

designated by the Commandant for the 

purpose of giving immediate direction 

to Coast Guard law enforcement activities within an assigned area. As used in 

this subchapter, the term Captain of the 

Port includes an authorized representative of the Captain of the Port. 

Carfloat means a vessel that operates 

on a short run on an irregular basis and 

serves one or more points in a port 

area as an extension of a rail line or 

highway over water, and does not operate in ocean, coastwise, or ferry service.

Cargo aircraft only means an aircraft 

that is used to transport cargo and is 

not engaged in carrying passengers. 

For purposes of this subchapter, the 

terms cargo aircraft only, cargo-only aircraft and cargo aircraft have the same 

meaning.

Cargo tank means a bulk packaging 

that:

(1) Is a tank intended primarily for 

the carriage of liquids or gases and includes appurtenances, reinforcements, 

fittings, and closures (for the definition 

of a tank, see 49 CFR 178.320, 178.337–1, 

or 178.338–1, as applicable); 

(2) Is permanently attached to or 

forms a part of a motor vehicle, or is 

not permanently attached to a motor 

vehicle but which, by reason of its size, 

construction or attachment to a motor 

vehicle is loaded or unloaded without 

being removed from the motor vehicle; 

and

(3) Is not fabricated under a specification for cylinders, intermediate 

bulk containers, multi-unit tank car 

tanks, portable tanks, or tank cars. 

Cargo tank motor vehicle means a 

motor vehicle with one or more cargo 

tanks permanently attached to or 

forming an integral part of the motor 

vehicle.

Cargo vessel means: (1) Any vessel 

other than a passenger vessel; and 

96

§ 171.8 49 CFR Ch. I (10–1–10 Edition) 

(2) Any ferry being operated under 

authority of a change of character certificate issued by a Coast Guard Officer-in-Charge, Marine Inspection. 

Carrier means a person who transports passengers or property in commerce by rail car, aircraft, motor vehicle, or vessel. 

CC means closed-cup. 

Character of vessel means the type of 

service in which the vessel is engaged 

at the time of carriage of a hazardous 

material.

Class means hazard class. See hazard

class.

Class 1. See §173.50 of this subchapter. 

Class 2. See §173.115 of this subchapter.

Class 3. See §173.120 of this subchapter.

Class 4. See §173.124 of this subchapter.

Class 5. See §173.128 of this subchapter.

Class 6. See §173.132 of this subchapter.

Class 7. See §173.403 of this subchapter.

Class 8. See §173.136 of this subchapter.

Class 9. See §173.140 of this subchapter.

Closure means a device which closes 

an opening in a receptacle. 

COFC means container-on-flat-car. 

Combination packaging means a combination of packaging, for transport 

purposes, consisting of one or more 

inner packagings secured in a non-bulk 

outer packaging. It does not include a 

composite packaging. 

Combustible liquid. See §173.120 of this 

subchapter.

Commerce means trade or transportation in the jurisdiction of the United 

States within a single state; between a 

place in a state and a place outside of 

the state; that affects trade or transportation between a place in a state 

and place outside of the state; or on a 

United States-registered aircraft. 

Compatibility group letter means a designated alphabetical letter used to categorize different types of explosive substances and articles for purposes of 

stowage and segregation. See §173.52 of 

this subchapter. 

Competent Authority means a national 

agency responsible under its national 

law for the control or regulation of a 

particular aspect of the transportation 

of hazardous materials (dangerous 

goods). The term Appropriate Authority, 

as used in the ICAO Technical Instructions (IBR, see §171.7), has the same 

meaning as Competent Authority. For

purposes of this subchapter, the Associate Administrator is the Competent 

Authority for the United States. 

Composite packaging means a packaging consisting of an outer packaging 

and an inner receptacle, so constructed 

that the inner receptacle and the outer 

packaging form an integral packaging. 

Once assembled it remains thereafter 

an integrated single unit; it is filled, 

stored, shipped and emptied as such. 

Compressed gas. See §173.115 of this 

subchapter.

Consignee means the person or place 

shown on a shipping document, package marking, or other media as the location to which a carrier is directed to 

transport a hazardous material. 

Consumer commodity means a material 

that is packaged and distributed in a 

form intended or suitable for sale 

through retail sales agencies or instrumentalities for consumption by individuals for purposes of personal care or 

household use. This term also includes 

drugs and medicines. 

Containership means a cargo vessel 

designed and constructed to transport, 

within specifically designed cells, portable tanks and freight containers 

which are lifted on and off with their 

contents intact. 

Corrosive material. See §173.136 of this 

subchapter.

Crate means an outer packaging with 

incomplete surfaces. 

Crewmember means a person assigned 

to perform duty in an aircraft during 

flight time. 

Cryogenic liquid. See §173.115(g) of 

this subchapter. 

Cultures and stocks. See §173.134 of 

this subchapter. 

Cylinder means a pressure vessel designed for pressures higher than 40 psia 

and having a circular cross section. It 

does not include a portable tank, 

multi-unit tank car tank, cargo tank, 

or tank car. 

Dangerous when wet material. See

§173.124 of this subchapter. 

97

Pipeline and Hazardous Materials Safety Admin., DOT § 171.8 

Design Certifying Engineer means a 

person registered with the Department 

in accordance with subpart F of part 

107 of this chapter who has the knowledge and ability to perform stress analysis of pressure vessels and otherwise 

determine whether a cargo tank design 

and construction meets the applicable 

DOT specification. A Design Certifying 

Engineer meets the knowledge and ability requirements of this section by 

meeting any one of the following requirements:

(1) Has an engineering degree and one 

year of work experience in cargo tank 

structural or mechanical design; 

(2) Is currently registered as a professional engineer by appropriate authority of a state of the United States or a 

province of Canada; or 

(3) Has at least three years’ experience in performing the duties of a Design Certifying Engineer prior to September 1, 1991. 

Designated facility means a hazardous 

waste treatment, storage, or disposal 

facility that has been designated on 

the manifest by the generator. 

District Commander means the District Commander of the Coast Guard, 

or his authorized representative, who 

has jurisdiction in the particular geographical area. 

Division means a subdivision of a hazard class. 

DOD means the U.S. Department of 

Defense.

Domestic transportation means transportation between places within the 

United States other than through a foreign country. 

DOT or Department means U.S. Department of Transportation. 

Drum means a flat-ended or convexended cylindrical packaging made of 

metal, fiberboard, plastic, plywood, or 

other suitable materials. This definition also includes packagings of other 

shapes made of metal or plastic (e.g., 

round taper-necked packagings or pailshaped packagings) but does not include cylinders, jerricans, wooden barrels or bulk packagings. 

Elevated temperature material means a 

material which, when offered for transportation or transported in a bulk 

packaging:

(1) Is in a liquid phase and at a temperature at or above 100 °C (212 °F);

(2) Is in a liquid phase with a flash 

point at or above 38 °C (100 °F) that is 

intentionally heated and offered for 

transportation or transported at or 

above its flash point; or 

(3) Is in a solid phase and at a temperature at or above 240 °C (464 °F).

Engine means a locomotive propelled 

by any form of energy and used by a 

railroad.

EPA means U.S. Environmental Protection Agency. 

Equivalent lithium content means, for 

a lithium-ion cell, the product of the 

rated capacity, in ampere-hours, of a 

lithium-ion cell times 0.3, with the result expressed in grams. The equivalent 

lithium content of a battery equals the 

sum of the grams of equivalent lithium 

content contained in the component 

cells of the battery. 

Etiologic agent. See §173.134 of this 

subchapter.

EX number means a number preceded 

by the prefix ‘‘EX’’, assigned by the Associate Administrator, to an item that 

has been evaluated under the provisions of §173.56 of this subchapter. 

Explosive. See §173.50 of this subchapter.

F means degree Fahrenheit. 

Farmer means a person engaged in 

the production or raising of crops, 

poultry, or livestock. 

Federal hazardous material transportation law means 49 U.S.C. 5101 et seq. 

Ferry vessel means a vessel which is 

limited in its use to the carriage of 

deck passengers or vehicles or both, operates on a short run on a frequent 

schedule between two points over the 

most direct water route, other than in 

ocean or coastwise service, and is offered as a public service of a type normally attributed to a bridge or tunnel. 

Filling density has the following 

meanings:

(1) For compressed gases in cylinders, 

see §173.304a(a)(2) table note 1. 

(2) For compressed gases in tank 

cars, see §173.314(c) table note 1. 

(3) For compressed gases in cargo 

tanks and portable tanks, see 

§173.315(a) table note 1. 

(4) For cryogenic liquids in cylinders, 

except hydrogen, see §173.316(c)(1). 

(5) For hydrogen, cryogenic liquid in 

cylinders, see §173.316(c)(3) table note 1. 

98

§ 171.8 49 CFR Ch. I (10–1–10 Edition) 

(6) For cryogenic liquids in cargo 

tanks, see §173.318(f)(1). 

(7) For cryogenic liquids in tank cars, 

see §173.319(d)(1). 

Flammable gas. See §173.115 of this 

subchapter.

Flammable liquid. See §173.120 of this 

subchapter.

Flammable solid. See §173.124 of this 

subchapter.

Flash point. See §173.120 of this subchapter.

Freight container means a reusable 

container having a volume of 64 cubic 

feet or more, designed and constructed 

to permit being lifted with its contents 

intact and intended primarily for containment of packages (in unit form) 

during transportation. 

Fuel cell means an electrochemical 

device that converts the energy of the 

chemical reaction between a fuel, such 

as hydrogen or hydrogen rich gases, alcohols, or hydrocarbons, and an oxidant, such as air or oxygen, to direct 

current (d.c.) power, heat, and other reaction products. 

Fuel cell cartridge or fuel cartridge 

means an article that stores fuel for 

discharge into the fuel cell through a 

valve(s) that controls the discharge of 

fuel into the fuel cell. 

Fuel cell system means a fuel cell with 

an installed fuel cell cartridge together 

with wiring, valves, and other attachments that connect the fuel cell or cartridge to the device it powers. The fuel 

cell or cartridge may be so constructed 

that it forms an integral part of the device or may be removed and connected 

manually to the device. 

Fuel tank means a tank other than a 

cargo tank, used to transport flammable or combustible liquid, or compressed gas for the purpose of supplying fuel for propulsion of the transport vehicle to which it is attached, or 

for the operation of other equipment 

on the transport vehicle. 

Fumigated lading. See §§172.302(g) and 

173.9.

Gas means a material which has a 

vapor pressure greater than 300 kPa 

(43.5 psia) at 50 °C (122 °F) or is completely gaseous at 20 °C (68 °F) at a 

standard pressure of 101.3 kPa (14.7 

psia).

Gross weight or Gross mass means the 

weight of a packaging plus the weight 

of its contents. 

Hazard class means the category of 

hazard assigned to a hazardous material under the definitional criteria of 

part 173 of this subchapter and the provisions of the §172.101 table. A material 

may meet the defining criteria for 

more than one hazard class but is assigned to only one hazard class. 

Hazard zone means one of four levels 

of hazard (Hazard Zones A through D) 

assigned to gases, as specified in 

§173.116(a) of this subchapter, and one 

of two levels of hazards (Hazard Zones 

A and B) assigned to liquids that are 

poisonous by inhalation, as specified in 

§173.133(a) of this subchapter. A hazard 

zone is based on the LC50 value for 

acute inhalation toxicity of gases and 

vapors, as specified in §173.133(a). 

Hazardous material means a substance 

or material that the Secretary of 

Transportation has determined is capable of posing an unreasonable risk to 

health, safety, and property when 

transported in commerce, and has designated as hazardous under section 5103 

of Federal hazardous materials transportation law (49 U.S.C. 5103). The term 

includes hazardous substances, hazardous wastes, marine pollutants, elevated temperature materials, materials designated as hazardous in the 

Hazardous Materials Table (see 49 CFR 

172.101), and materials that meet the 

defining criteria for hazard classes and 

divisions in part 173 of subchapter C of 

this chapter. 

Hazardous substance for the purposes 

of this subchapter, means a material, 

including its mixtures and solutions, 

that—

(1) Is listed in the appendix A to 

§172.101 of this subchapter; 

(2) Is in a quantity, in one package, 

which equals or exceeds the reportable 

quantity (RQ) listed in the appendix A 

to §172.101 of this subchapter; and 

(3) When in a mixture or solution— 

(i) For radionuclides, conforms to 

paragraph 7 of the appendix A to 

§172.101. 

(ii) For other than radionuclides, is 

in a concentration by weight which 

equals or exceeds the concentration 

corresponding to the RQ of the material, as shown in the following table: 

99

Pipeline and Hazardous Materials Safety Admin., DOT § 171.8 

RQ pounds (kilograms) 

Concentration by 

weight

Percent PPM 

5000 (2270) ....................................... 10 100,000 

1000 (454) ......................................... 2 20,000 

100 (45.4) .......................................... 0.2 2,000 

10 (4.54) ............................................ 0.02 200 

1 (0.454) ............................................ 0.002 20 

The term does not include petroleum, 

including crude oil or any fraction 

thereof which is not otherwise specifically listed or designated as a hazardous substance in appendix A to 

§172.101 of this subchapter, and the 

term does not include natural gas, natural gas liquids, liquefied natural gas, 

or synthetic gas usable for fuel (or mixtures of natural gas and such synthetic 

gas).

Hazardous waste, for the purposes of 

this chapter, means any material that 

is subject to the Hazardous Waste 

Manifest Requirements of the U.S. Environmental Protection Agency specified in 40 CFR part 262. 

Hazmat means a hazardous material. 

Hazmat employee means: (1) A person 

who is: 

(i) Employed on a full-time, part 

time, or temporary basis by a hazmat 

employer and who in the course of such 

full time, part time or temporary employment directly affects hazardous 

materials transportation safety; 

(ii) Self-employed (including an 

owner-operator of a motor vehicle, vessel, or aircraft) transporting hazardous 

materials in commerce who in the 

course of such self-employment directly affects hazardous materials 

transportation safety; 

(iii) A railroad signalman; or 

(iv) A railroad maintenance-of-way 

employee.

(2) This term includes an individual, 

employed on a full time, part time, or 

temporary basis by a hazmat employer, 

or who is self-employed, who during 

the course of employment: 

(i) Loads, unloads, or handles hazardous materials; 

(ii) Designs, manufactures, fabricates, inspects, marks, maintains, reconditions, repairs, or tests a package, 

container or packaging component 

that is represented, marked, certified, 

or sold as qualified for use in transporting hazardous material in commerce.

(iii) Prepares hazardous materials for 

transportation;

(iv) Is responsible for safety of transporting hazardous materials; 

(v) Operates a vehicle used to transport hazardous materials. 

Hazmat employer means:

(1) A person who employs or uses at 

least one hazmat employee on a fulltime, part time, or temporary basis; 

and who: 

(i) Transports hazardous materials in 

commerce;

(ii) Causes hazardous materials to be 

transported in commerce; or 

(iii) Designs, manufactures, fabricates, inspects, marks, maintains, reconditions, repairs or tests a package, 

container, or packaging component 

that is represented, marked, certified, 

or sold by that person as qualified for 

use in transporting hazardous materials in commerce; 

(2) A person who is self-employed (including an owner-operator of a motor 

vehicle, vessel, or aircraft) transporting materials in commerce; and 

who:

(i) Transports hazardous materials in 

commerce;

(ii) Causes hazardous materials to be 

transported in commerce; or 

(iii) Designs, manufactures, fabricates, inspects, marks, maintains, reconditions, repairs or tests a package, 

container, or packaging component 

that is represented, marked, certified, 

or sold by that person as qualified for 

use in transporting hazardous materials in commerce; or 

(3) A department, agency, or instrumentality of the United States Government, or an authority of a State, political subdivision of a State, or an Indian 

tribe; and who: 

(i) Transports hazardous materials in 

commerce;

(ii) Causes hazardous materials to be 

transported in commerce; or 

(iii) Designs, manufactures, fabricates, inspects, marks, maintains, reconditions, repairs or tests a package, 

container, or packaging component 

that is represented, marked, certified, 

or sold by that person as qualified for 

use in transporting hazardous materials in commerce. 

100

§ 171.8 49 CFR Ch. I (10–1–10 Edition) 

Hermetically sealed means closed by 

fusion, gasketing, crimping, or equivalent means so that no gas or vapor can 

enter or escape. 

Household waste means any solid 

waste (including garbage, trash, and 

sanitary waste from septic tanks) derived from households (including single 

and multiple residences, hotels and 

motels, bunkhouses, ranger stations, 

crew quarters, campgrounds, picnic 

grounds, and day-use recreation areas). 

This term is not applicable to consolidated shipments of household hazardous materials transported from collection centers. A collection center is a 

central location where household waste 

is collected. 

HMR means the Hazardous Materials 

Regulations, Parts 171 through 180 of 

this chapter. 

IAEA means International Atomic 

Energy Agency. 

IATA means International Air Transport Association. 

ICAO means International Civil Aviation Organization. 

IMO means International Maritime 

Organization.

Incorporated by reference or IBR

means a publication or a portion of a 

publication that is made a part of the 

regulations of this subchapter. See 

§171.7. 

Infectious substance (etiologic agent). 

See §173.134 of this subchapter. 

Inner packaging means a packaging 

for which an outer packaging is required for transport. It does not include the inner receptacle of a composite packaging. 

Inner receptacle means a receptacle 

which requires an outer packaging in 

order to perform its containment function. The inner receptacle may be an 

inner packaging of a combination 

packaging or the inner receptacle of a 

composite packaging. 

Intermediate bulk container or IBC

means a rigid or flexible portable packaging, other than a cylinder or portable tank, which is designed for mechanical handling. Standards for IBCs 

manufactured in the United States are 

set forth in subparts N and O of part 

178 of this subchapter. 

Intermediate packaging means a packaging which encloses an inner packaging or article and is itself enclosed in 

an outer packaging. 

Intermodal container means a freight 

container designed and constructed to 

permit it to be used interchangeably in 

two or more modes of transport. 

Intermodal portable tank or IM portable 

tank means a specific class of portable 

tanks designed primarily for international intermodal use. 

International transportation means

transportation—

(1) Between any place in the United 

States and any place in a foreign country;

(2) Between places in the United 

States through a foreign country; or 

(3) Between places in one or more foreign countries through the United 

States.

Irritating material. See §173.132(a)(2) of 

this subchapter. 

Jerrican means a metal or plastic 

packaging of rectangular or polygonal 

cross-section.

Large packaging means a packaging 

that—

(1) Consists of an outer packaging 

that contains articles or inner packagings;

(2) Is designated for mechanical handling;

(3) Exceeds 400 kg net mass or 450 liters (118.9 gallons) capacity; 

(4) Has a volume of not more than 3 

cubic meters (m3) (see §178.801(i) of this 

subchapter); and 

(5) Conforms to the requirements for 

the construction, testing and marking 

of Large Packagings as specified in 

subparts P and Q of part 178 of this subchapter.

Limited quantity, when specified as 

such in a section applicable to a particular material, means the maximum 

amount of a hazardous material for 

which there is a specific labeling or 

packaging exception. 

Lighter means a mechanically operated flame-producing device employing 

an ignition device and containing a 

Class 3 or a Division 2.1 material. For 

design, capacity, and filling density requirements for lighters containing a 

Division 2.1 material, see §173.308. 

Lighter refill means a pressurized container that does not contain an ignition device but does contain a release 

101

Pipeline and Hazardous Materials Safety Admin., DOT § 171.8 

device and is intended for use as a replacement cartridge in a lighter or to 

refill a lighter with a Division 2.1 flammable gas fuel. For capacity limits, see 

§173.306(h) of this subchapter. 

Liquid means a material, other than 

an elevated temperature material, with 

a melting point or initial melting point 

of 20 °C (68 °F) or lower at a standard 

pressure of 101.3 kPa (14.7 psia). A viscous material for which a specific 

melting point cannot be determined 

must be subjected to the procedures 

specified in ASTM D 4359 ‘‘Standard 

Test Method for Determining Whether 

a Material is Liquid or Solid’’ (IBR, see 

§171.7). 

Liquid phase means a material that 

meets the definition of liquid when 

evaluated at the higher of the temperature at which it is offered for transportation or at which it is transported, 

not at the 38 °C (100 °F) temperature 

specified in ASTM D 4359 (IBR, see 

§171.7). 

Lithium content means the mass of 

lithium in the anode of a lithium metal 

or lithium alloy cell. The lithium content of a battery equals the sum of the 

grams of lithium content contained in 

the component cells of the battery. For 

a lithium-ion cell see the definition for 

‘‘equivalent lithium content’’. 

Loading incidental to movement means

loading by carrier personnel or in the 

presence of carrier personnel of packaged or containerized hazardous material onto a transport vehicle, aircraft, 

or vessel for the purpose of transporting it, including the loading, 

blocking and bracing a hazardous materials package in a freight container 

or transport vehicle, and segregating a 

hazardous materials package in a 

freight container or transport vehicle 

from incompatible cargo. For a bulk 

packaging, loading incidental to movement means filling the packaging with 

a hazardous material for the purpose of 

transporting it. Loading incidental to 

movement includes transloading. 

Magazine vessel means a vessel used 

for the receiving, storing, or dispensing 

of explosives. 

Magnetic material. See §173.21(d) of 

this subchapter. 

Marine pollutant, means a material 

which is listed in appendix B to §172.101 

of this subchapter (also see §171.4) and, 

when in a solution or mixture of one or 

more marine pollutants, is packaged in 

a concentration which equals or exceeds:

(1) Ten percent by weight of the solution or mixture for materials listed in 

the appendix; or 

(2) One percent by weight of the solution or mixture for materials that are 

identified as severe marine pollutants 

in the appendix. 

Marking means a descriptive name, 

identification number, instructions, 

cautions, weight, specification, or UN 

marks, or combinations thereof, required by this subchapter on outer 

packagings of hazardous materials. 

Material of trade means a hazardous 

material, other than a hazardous 

waste, that is carried on a motor vehicle—

(1) For the purpose of protecting the 

health and safety of the motor vehicle 

operator or passengers; 

(2) For the purpose of supporting the 

operation or maintenance of a motor 

vehicle (including its auxiliary equipment); or 

(3) By a private motor carrier (including vehicles operated by a rail carrier) in direct support of a principal 

business that is other than transportation by motor vehicle. 

Material poisonous by inhalation or

Material toxic by inhalation means:

(1) A gas meeting the defining criteria in §173.115(c) of this subchapter 

and assigned to Hazard Zone A, B, C, or 

D in accordance with §173.116(a) of this 

subchapter;

(2) A liquid (other than as a mist) 

meeting the defining criteria in 

§173.132(a)(1)(iii) of this subchapter and 

assigned to Hazard Zone A or B in accordance with §173.133(a) of this subchapter; or 

(3) Any material identified as an inhalation hazard by a special provision 

in column 7 of the §172.101 table. 

Maximum allowable working pressure 

or MAWP: For DOT specification cargo 

tanks used to transport liquid hazardous materials, see §178.320(a) of this 

subchapter.

Maximum capacity means the maximum inner volume of receptacles or 

packagings.

Maximum net mass means the allowable maximum net mass of contents in 

102

§ 171.8 49 CFR Ch. I (10–1–10 Edition) 

a single packaging, or as used in subpart M of part 178 of this subchapter, 

the maximum combined mass of inner 

packaging, and the contents thereof. 

Mechanical displacement meter prover 

means a mechanical device used in the 

oilfield service industry consisting of a 

pipe assembly that is used to calibrate 

the accuracy and performance of meters that measure the quantities of a 

product being pumped or transferred at 

facilities such as drilling locations, refineries, tank farms, and loading racks. 

Metered delivery service means a cargo 

tank unloading operation conducted at 

a metered flow rate of 378.5 L (100 gallons) per minute or less through an attached delivery hose with a nominal inside diameter of 3.175 cm (11⁄4 inches) or 

less.

Miscellaneous hazardous material. See

§173.140 of this subchapter. 

Mixture means a material composed 

of more than one chemical compound 

or element. 

Mode means any of the following 

transportation methods; rail, highway, 

air, or water. 

Motor vehicle includes a vehicle, machine, tractor, trailer, or semitrailer, 

or any combination thereof, propelled 

or drawn by mechanical power and 

used upon the highways in the transportation of passengers or property. It 

does not include a vehicle, locomotive, 

or car operated exclusively on a rail or 

rails, or a trolley bus operated by electric power derived from a fixed overhead wire, furnishing local passenger 

transportation similar to street-railway service. 

Movement means the physical transfer of a hazardous material from one 

geographic location to another by rail 

car, aircraft, motor vehicle, or vessel. 

Multiple-element gas container or 

MEGC means assemblies of UN cylinders, tubes, or bundles of cylinders 

interconnected by a manifold and assembled within a framework. The term 

includes all service equipment and 

structural equipment necessary for the 

transport of gases. 

Name of contents means the proper 

shipping name as specified in §172.101 

of this subchapter. 

Navigable waters means, for the purposes of this subchapter, waters of the 

United States, including the territorial 

seas.

Non-bulk packaging means a packaging which has: 

(1) A maximum capacity of 450 L (119 

gallons) or less as a receptacle for a 

liquid;

(2) A maximum net mass of 400 kg 

(882 pounds) or less and a maximum capacity of 450 L (119 gallons) or less as a 

receptacle for a solid; or 

(3) A water capacity of 454 kg (1000 

pounds) or less as a receptacle for a gas 

as defined in §173.115 of this subchapter.

Nonflammable gas. See §173.115 of this 

subchapter.

N.O.S. means not otherwise specified. 

N.O.S. description means a shipping 

description from the §172.101 table 

which includes the abbreviation n.o.s.

NPT means an American Standard 

taper pipe thread conforming to the requirements of NBS Handbook H–28 

(IBR, see §171.7). 

NRC (non-reusable container) means a 

packaging (container) whose reuse is 

restricted in accordance with the provisions of §173.28 of this subchapter. 

Occupied caboose means a rail car 

being used to transport non-passenger 

personnel.

Officer in Charge, Marine Inspection 

means a person from the civilian or 

military branch of the Coast Guard 

designated as such by the Commandant 

and who under the supervision and direction of the Coast Guard District 

Commander is in charge of a designated inspection zone for the performance of duties with respect to the 

enforcement and administration of 

title 52, Revised Statutes, acts amendatory thereof or supplemental thereto, 

rules and regulations thereunder, and 

the inspection required thereby. 

Offshore supply vessel means a cargo 

vessel of less than 500 gross tons that 

regularly transports goods, supplies or 

equipment in support of exploration or 

production of offshore mineral or energy resources. 

Operator means a person who controls 

the use of an aircraft, vessel, or vehicle.

Organic peroxide. See §173.128 of this 

subchapter.

ORM means other regulated material. See §173.144 of this subchapter. 

103

Pipeline and Hazardous Materials Safety Admin., DOT § 171.8 

Outage or ullage means the amount 

by which a packaging falls short of 

being liquid full, usually expressed in 

percent by volume. 

Outer packaging means the outermost 

enclosure of a composite or combination packaging together with any absorbent materials, cushioning and any 

other components necessary to contain 

and protect inner receptacles or inner 

packagings.

Overpack, except as provided in subpart K of part 178 of this subchapter, 

means an enclosure that is used by a 

single consignor to provide protection 

or convenience in handling of a package or to consolidate two or more 

packages. Overpack does not include a 

transport vehicle, freight container, or 

aircraft unit load device. Examples of 

overpacks are one or more packages: 

(1) Placed or stacked onto a load 

board such as a pallet and secured by 

strapping, shrink wrapping, stretch 

wrapping, or other suitable means; or 

(2) Placed in a protective outer packaging such as a box or crate. 

Oxidizer. See §173.127 of this subchapter.

Oxidizing gas means a gas which may, 

generally by providing oxygen, cause 

or contribute to the combustion of 

other material more than air does. 

Oxygen generator (chemical) means a 

device containing chemicals that upon 

activation release oxygen as a product 

of chemical reaction. 

Package or Outside Package means a 

packaging plus its contents. For radioactive materials, see §173.403 of this 

subchapter.

Packaging means a receptacle and 

any other components or materials 

necessary for the receptacle to perform 

its containment function in conformance with the minimum packing requirements of this subchapter. For radioactive materials packaging, see 

§173.403 of this subchapter. 

Packing group means a grouping according to the degree of danger presented by hazardous materials. Packing Group I indicates great danger; 

Packing Group II, medium danger; 

Packing Group III, minor danger. See 

§172.101(f) of this subchapter. 

Passenger (With respect to vessels and 

for the purposes of part 176 only) means 

a person being carried on a vessel other 

than:

(1) The owner or his representative; 

(2) The operator; 

(3) A bona fide member of the crew 

engaged in the business of the vessel 

who has contributed no consideration 

for his carriage and who is paid for his 

services; or 

(4) A guest who has not contributed 

any consideration directly or indirectly for his carriage. 

Passenger-carrying aircraft means an 

aircraft that carries any person other 

than a crewmember, company employee, an authorized representative of 

the United States, or a person accompanying the shipment. 

Passenger vessel means—

(1) A vessel subject to any of the requirements of the International Convention for the Safety of Life at Sea, 

1974, which carries more than 12 passengers;

(2) A cargo vessel documented under 

the laws of the United States and not 

subject to that Convention, which carries more than 16 passengers; 

(3) A cargo vessel of any foreign nation that extends reciprocal privileges 

and is not subject to that Convention 

and which carries more than 16 passengers; and 

(4) A vessel engaged in a ferry operation and which carries passengers. 

Person means an individual, corporation, company, association, firm, partnership, society, joint stock company; 

or a government, Indian tribe, or authority of a government or tribe offering a hazardous material for transportation in commerce or transporting a 

hazardous material to support a commercial enterprise. This term does not 

include the United States Postal Service or, for purposes of 49 U.S.C. 5123 and 

5124, a Department, agency, or instrumentality of the government. 

Person who offers or offeror means:

(1) Any person who does either or 

both of the following: 

(i) Performs, or is responsible for performing, any pre-transportation function required under this subchapter for 

transportation of the hazardous material in commerce. 

(ii) Tenders or makes the hazardous 

material available to a carrier for 

transportation in commerce. 

104

§ 171.8 49 CFR Ch. I (10–1–10 Edition) 

(2) A carrier is not an offeror when it 

performs a function required by this 

subchapter as a condition of acceptance of a hazardous material for transportation in commerce (e.g., reviewing 

shipping papers, examining packages 

to ensure that they are in conformance 

with this subchapter, or preparing 

shipping documentation for its own 

use) or when it transfers a hazardous 

material to another carrier for continued transportation in commerce without performing a pre-transportation 

function.

PHMSA means the Pipeline and Hazardous Materials Safety Administration, U.S. Department of Transportation, Washington, DC 20590. 

Placarded car means a rail car which 

is placarded in accordance with the requirements of part 172 of this subchapter.

Poisonous gas. See §173.115 of this subchapter.

Poisonous materials. See §173.132 of 

this subchapter. 

Portable tank means a bulk packaging 

(except a cylinder having a water capacity of 1000 pounds or less) designed 

primarily to be loaded onto, or on, or 

temporarily attached to a transport vehicle or ship and equipped with skids, 

mountings, or accessories to facilitate 

handling of the tank by mechanical 

means. It does not include a cargo 

tank, tank car, multi-unit tank car 

tank, or trailer carrying 3AX, 3AAX, or 

3T cylinders. 

Preferred route or Preferred highway is

a highway for shipment of highway

route controlled quantities of radioactive 

materials so designated by a State 

routing agency, and any Interstate 

System highway for which an alternative highway has not been designated by such State agency as provided by §397.103 of this title. 

Pre-transportation function means a 

function specified in the HMR that is 

required to assure the safe transportation of a hazardous material in commerce, including— 

(1) Determining the hazard class of a 

hazardous material. 

(2) Selecting a hazardous materials 

packaging.

(3) Filling a hazardous materials 

packaging, including a bulk packaging. 

(4) Securing a closure on a filled or 

partially filled hazardous materials 

package or container or on a package 

or container containing a residue of a 

hazardous material. 

(5) Marking a package to indicate 

that it contains a hazardous material. 

(6) Labeling a package to indicate 

that it contains a hazardous material. 

(7) Preparing a shipping paper. 

(8) Providing and maintaining emergency response information. 

(9) Reviewing a shipping paper to 

verify compliance with the HMR or 

international equivalents. 

(10) For each person importing a hazardous material into the United States, 

providing the shipper with timely and 

complete information as to the HMR 

requirements that will apply to the 

transportation of the material within 

the United States. 

(11) Certifying that a hazardous material is in proper condition for transportation in conformance with the requirements of the HMR. 

(12) Loading, blocking, and bracing a 

hazardous materials package in a 

freight container or transport vehicle. 

(13) Segregating a hazardous materials package in a freight container or 

transport vehicle from incompatible 

cargo.

(14) Selecting, providing, or affixing 

placards for a freight container or 

transport vehicle to indicate that it 

contains a hazardous material. 

Primary hazard means the hazard 

class of a material as assigned in the 

§172.101 table. 

Private track or Private siding means:

(i) Track located outside of a carrier’s 

right-of-way, yard, or terminals where 

the carrier does not own the rails, ties, 

roadbed, or right-of-way, or 

(ii) Track leased by a railroad to a 

lessee, where the lease provides for, 

and actual practice entails, exclusive 

use of that trackage by the lessee and/ 

or a general system railroad for purpose of moving only cars shipped to or 

by the lessee, and where the lessor otherwise exercises no control over or responsibility for the trackage or the 

cars on the trackage. 

Proper shipping name means the name 

of the hazardous material shown in 

Roman print (not italics) in §172.101 of 

this subchapter. 

105

Pipeline and Hazardous Materials Safety Admin., DOT § 171.8 

Psi means pounds per square inch. 

Psia means pounds per square inch 

absolute.

Psig means pounds per square inch 

gauge.

Public vessel means a vessel owned by 

and being used in the public service of 

the United States. It does not include a 

vessel owned by the United States and 

engaged in a trade or commercial service or a vessel under contract or charter to the United States. 

Pyrophoric liquid. See §173.124(b) of 

this subchapter. 

Radioactive materials. See §173.403 of 

this subchapter for definitions relating 

to radioactive materials. 

Rail car means a car designed to 

carry freight or non-passenger personnel by rail, and includes a box car, 

flat car, gondola car, hopper car, tank 

car, and occupied caboose. 

Railroad means a person engaged in 

transportation by rail. 

Receptacle means a containment vessel for receiving and holding materials, 

including any means of closing. 

Reconditioned packaging. See §173.28 

of this subchapter. 

Registered Inspector means a person 

registered with the Department in accordance with subpart F of part 107 of 

this chapter who has the knowledge 

and ability to determine whether a 

cargo tank conforms to the applicable 

DOT specification. A Registered Inspector meets the knowledge and ability requirements of this section by meeting 

any one of the following requirements: 

(1) Has an engineering degree and one 

year of work experience relating to the 

testing and inspection of cargo tanks; 

(2) Has an associate degree in engineering and two years of work experience relating to the testing and inspection of cargo tanks; 

(3) Has a high school diploma (or 

General Equivalency Diploma) and 

three years of work experience relating 

to the testing and inspection of cargo 

tanks; or 

(4) Has at least three years’ experience performing the duties of a Registered Inspector prior to September 1, 

1991.

Regulated medical waste. See §173.134 

of this subchapter. 

Remanufactured packagings. See

§173.28 of this subchapter. 

Reportable quantity (RQ) for the purposes of this subchapter means the 

quantity specified in column 2 of the 

appendix to §172.101 for any material 

identified in column 1 of the appendix. 

Research means investigation or experimentation aimed at the discovery 

of new theories or laws and the discovery and interpretation of facts or 

revision of accepted theories or laws in 

the light of new facts. Research does 

not include the application of existing 

technology to industrial endeavors. 

Residue means the hazardous material remaining in a packaging, including a tank car, after its contents have 

been unloaded to the maximum extent 

practicable and before the packaging is 

either refilled or cleaned of hazardous 

material and purged to remove any 

hazardous vapors. 

Reused packaging. See §173.28 of this 

subchapter.

SADT means self-accelerated decomposition temperature. See §173.21(f) of 

this subchapter. 

Salvage packaging means a special 

packaging conforming to §173.3 of this 

subchapter into which damaged, defective, leaking, or non-conforming hazardous materials packages, or hazardous materials that have spilled or 

leaked, are placed for purposes of 

transport for recovery or disposal. 

SCF (standard cubic foot) means one 

cubic foot of gas measured at 60 °F. and 

14.7 psia. 

Secretary means the Secretary of 

Transportation.

Self-defense spray means an aerosol or 

non-pressurized device that: 

(1) Is intended to have an irritating 

or incapacitating effect on a person or 

animal; and 

(2) Meets no hazard criteria other 

than for Class 9 (for example, a pepper 

spray; see §173.140(a) of this subchapter) and, for an aerosol, Division 

2.1 or 2.2 (see §173.115 of this subchapter), except that it may contain 

not more than two percent by mass of 

a tear gas substance (e.g., 

chloroacetophenone (CN) or 0- 

chlorobenzylmalonitrile (CS); see 

§173.132(a)(2) of this subchapter.) 

Settled pressure means the pressure 

exerted by the contents of a UN pressure receptacle in thermal and diffusive equilibrium. 

106

§ 171.8 49 CFR Ch. I (10–1–10 Edition) 

Sharps. See §173.134 of this subchapter.

Shipping paper means a shipping 

order, bill of lading, manifest or other 

shipping document serving a similar 

purpose and prepared in accordance 

with subpart C of part 172 of this chapter.

Siftproof packaging means a packaging impermeable to dry contents, including fine solid material produced 

during transportation. 

Single packaging means a non-bulk 

packaging other than a combination 

packaging.

Solid means a material which is not a 

gas or a liquid. 

Solution means any homogeneous liquid mixture of two or more chemical 

compounds or elements that will not 

undergo any segregation under conditions normal to transportation. 

Special permit means a document 

issued by the Associate Administrator, 

or other designated Department official, under the authority of 49 U.S.C. 

5117 permitting a person to perform a 

function that is not otherwise permitted under subchapters A or C of this 

chapter, or other regulations issued 

under 49 U.S.C. 5101 et seq. (e.g., Federal 

Motor Carrier Safety routing requirements). The terms ‘‘special permit’’ 

and ‘‘exemption’’ have the same meaning for purposes of subchapters A or C 

of this chapter or other regulations 

issued under 49 U.S.C. 5101 through 

5128.

Specification packaging means a packaging conforming to one of the specifications or standards for packagings 

in part 178 or part 179 of this subchapter.

Spontaneously combustible material. 

See §173.124(b) of this subchapter. 

Stabilized means that the hazardous 

material is in a condition that precludes uncontrolled reaction. This may 

be achieved by methods such as adding 

an inhibiting chemical, degassing the 

hazardous material to remove dissolved oxygen and inerting the air 

space in the package, or maintaining 

the hazardous material under temperature control. 

State means a State of the United 

States, the District of Columbia, the 

Commonwealth of Puerto Rico, the 

Commonwealth of the Northern Mariana Islands, the Virgin Islands, American Samoa, Guam, or any other territory or possession of the United States 

designated by the Secretary. 

State-designated route means a preferred route selected in accordance 

with U.S. DOT ‘‘Guidelines for Selecting Preferred Highway Routes for 

Highway Route Controlled Quantities 

of Radioactive Materials’’ or an equivalent routing analysis which adequately considers overall risk to the 

public.

Storage incidental to movement means

storage of a transport vehicle, freight 

container, or package containing a hazardous material by any person between 

the time that a carrier takes physical 

possession of the hazardous material 

for the purpose of transporting it in 

commerce until the package containing the hazardous material is physically delivered to the destination indicated on a shipping document, package 

marking, or other medium, or, in the 

case of a private motor carrier, between the time that a motor vehicle 

driver takes physical possession of the 

hazardous material for the purpose of 

transporting it in commerce until the 

driver relinquishes possession of the 

package at its destination and is no 

longer responsible for performing functions subject to the HMR with respect 

to that particular package. 

(1) Storage incidental to movement includes—

(i) Storage at the destination shown 

on a shipping document, including 

storage at a transloading facility, provided the shipping documentation identifies the shipment as a through-shipment and identifies the final destination or destinations of the hazardous 

material; and 

(ii) Rail cars containing hazardous 

materials that are stored on track that 

does not meet the definition of ‘‘private track or siding’’ in §171.8, even if 

those cars have been delivered to the 

destination shown on the shipping document.

(2) Storage incidental to movement 

does not include storage of a hazardous 

material at its final destination as 

shown on a shipping document. 

Stowage means the act of placing hazardous materials on board a vessel. 

107

Pipeline and Hazardous Materials Safety Admin., DOT § 171.8 

Strong outer packaging means the outermost enclosure that provides protection against the unintentional release 

of its contents. It is a packaging that 

is sturdy, durable, and constructed so 

that it will retain its contents under 

normal conditions of transportation. In 

addition, a strong outer packaging 

must meet the general packaging requirements of subpart B of part 173 of 

this subchapter but need not comply 

with the specification packaging requirements in part 178 of the subchapter. For transport by aircraft, a 

strong outer packaging is subject to 

§173.27 of this subchapter. The terms 

‘‘strong outside container’’ and ‘‘strong 

outside packaging’’ are synonymous 

with ‘‘strong outer packaging.’’ 

Subsidiary hazard means a hazard of a 

material other than the primary hazard. (See primary hazard).

Table in §172.101 or §172.101 table 

means the Hazardous Materials Table 

in §172.101 of this subchapter. 

Technical name means a recognized 

chemical name or microbiological 

name currently used in scientific and 

technical handbooks, journals, and 

texts. Generic descriptions are authorized for use as technical names provided they readily identify the general 

chemical group, or microbiological 

group. Examples of acceptable generic 

chemical descriptions are organic phosphate compounds, petroleum aliphatic 

hydrocarbons and tertiary amines. For 

proficiency testing only, generic 

microbiological descriptions such as 

bacteria, mycobacteria, fungus, and 

viral samples may be used. Except for 

names which appear in subpart B of 

part 172 of this subchapter, trade 

names may not be used as technical 

names.

TOFC means trailer-on-flat-car. 

Top shell means the tank car tank 

surface, excluding the head ends and 

bottom shell of the tank car tank. 

Toxin. See §173.134 of this subchapter. 

Trailership means a vessel, other than 

a carfloat, specifically equipped to 

carry motor transport vehicles and 

fitted with installed securing devices 

to tie down each vehicle. The term 

trailership includes Roll-on/Roll-off (RO/ 

RO) vessels.

Train means one or more engines coupled with one or more rail cars, except 

during switching operations or where 

the operation is that of classifying and 

assembling rail cars within a railroad 

yard for the purpose of making or 

breaking up trains. 

Trainship means a vessel other than a 

rail car ferry or carfloat, specifically 

equipped to transport railroad vehicles, 

and fitted with installed securing devices to tie down each vehicle. 

Transloading means the transfer of a 

hazardous material by any person from 

one bulk packaging to another bulk 

packaging, from a bulk packaging to a 

non-bulk packaging, or from a nonbulk packaging to a bulk packaging for 

the purpose of continuing the movement of the hazardous material in commerce.

Transport vehicle means a cargo-carrying vehicle such as an automobile, 

van, tractor, truck, semitrailer, tank 

car or rail car used for the transportation of cargo by any mode. Each 

cargo-carrying body (trailer, rail car, 

etc.) is a separate transport vehicle. 

Transportation or transport means the 

movement of property and loading, unloading, or storage incidental to that 

movement.

UFC means Uniform Freight Classification.

UN means United Nations. 

UN cylinder means a transportable 

pressure receptacle with a water capacity not exceeding 150 L that has been 

marked and certified as conforming to 

the applicable requirements in part 178 

of this subchapter. 

UN portable tank means an intermodal tank having a capacity of more 

than 450 liters (118.9 gallons). It includes a shell fitted with service equipment and structural equipment, including stabilizing members external to the 

shell and skids, mountings or accessories to facilitate mechanical handling. A UN portable tank must be capable of being filled and discharged 

without the removal of its structural 

equipment and must be capable of 

being lifted when full. Cargo tanks, rail 

tank car tanks, non-metallic tanks, 

non-specification tanks, bulk bins, and 

IBCs and packagings made to cylinder 

specifications are not UN portable 

tanks.

UN pressure receptacle means a UN 

cylinder or tube. 

108

§ 171.8 49 CFR Ch. I (10–1–10 Edition) 

UN Recommendations means the UN 

Recommendations on the Transport of 

Dangerous Goods (IBR, see §171.7). 

UN standard packaging means a packaging conforming to standards in the 

UN Recommendations (IBR, see §171.7). 

UN tube means a seamless transportable pressure receptacle with a water 

capacity exceeding 150 L but not more 

than 3,000 L that has been marked and 

certified as conforming to the requirements in part 178 of this subchapter. 

Undeclared hazardous material means

a hazardous material that is: (1) Subject to any of the hazard communication requirements in subparts C (Shipping Papers), D (Marking), E (Labeling), and F (Placarding) of Part 172 of 

this subchapter, or an alternative 

marking requirement in Part 173 of 

this subchapter (such as §§173.4(a)(10) 

and 173.6(c)); and (2) offered for transportation in commerce without any 

visible indication to the person accepting the hazardous material for transportation that a hazardous material is 

present, on either an accompanying 

shipping document, or the outside of a 

transport vehicle, freight container, or 

package.

Unintentional release means the escape of a hazardous material from a 

package on an occasion not anticipated 

or planned. This includes releases resulting from collision, package failures, human error, criminal activity, 

negligence, improper packing, or unusual conditions such as the operation 

of pressure relief devices as a result of 

over-pressurization, overfill or fire exposure. It does not include releases, 

such as venting of packages, where allowed, and the operational discharge of 

contents from packages. 

Unit load device means any type of 

freight container, aircraft container, 

aircraft pallet with a net, or aircraft 

pallet with a net over an igloo. 

United States means a State of the 

United States, the District of Columbia, the Commonwealth of Puerto Rico, 

the Commonwealth of the Northern 

Mariana Islands, the Virgin Islands, 

American Samoa, Guam, or any other 

territory or possession of the United 

States designated by the Secretary. 

Unloading incidental to movement 

means removing a packaged or containerized hazardous material from a 

transport vehicle, aircraft, or vessel, or 

for a bulk packaging, emptying a hazardous material from the bulk packaging after the hazardous material has 

been delivered to the consignee when 

performed by carrier personnel or in 

the presence of carrier personnel or, in 

the case of a private motor carrier, 

while the driver of the motor vehicle 

from which the hazardous material is 

being unloaded immediately after 

movement is completed is present during the unloading operation. 

(Emptying a hazardous material from a 

bulk packaging while the packaging is 

on board a vessel is subject to separate 

regulations as delegated by Department of Homeland Security Delegation 

No. 0170.1 at 2(103).) Unloading incidental to movement includes

transloading.

Vessel includes every description of 

watercraft, used or capable of being 

used as a means of transportation on 

the water. 

Viscous liquid means a liquid material 

which has a measured viscosity in excess of 2500 centistokes at 25 °C. (77 °F.)

when determined in accordance with 

the procedures specified in ASTM 

Method D 445–72 ‘‘Kinematic Viscosity 

of Transparent and Opaque Liquids 

(and the Calculation of Dynamic Viscosity)’’ or ASTM Method D 1200–70 

‘‘Viscosity of Paints, Varnishes, and 

Lacquers by Ford Viscosity Cup.’’ 

Volatility refers to the relative rate of 

evaporation of materials to assume the 

vapor state. 

Water reactive material. See §173.124(c) 

of this subchapter. 

Water resistant means having a degree 

of resistance to permeability by and 

damage caused by water in liquid form. 

Wooden barrel means a packaging 

made of natural wood, of round crosssection, having convex walls, consisting of staves and heads and fitted 

with hoops. 

Working pressure for purposes of UN 

pressure receptacles, means the settled 

pressure of a compressed gas at a reference temperature of 15 °C (59 °F).

W.T. means watertight. 

[Amdt. 171–32, 41 FR 15994, Apr. 15, 1976] 

EDITORIAL NOTE: For FEDERAL REGISTER citations affecting §171.8, see the List of CFR