Source: https://www.ecfr.gov/cgi-bin/text-idx?mc=true&node=pt46.1.38&rgn=div5
Timestamp: 2019-11-21 17:32:27
Document Index: 120132302

Matched Legal Cases: ['art 38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', 'arts 171', '§38', '§32', '§32', '§32', '§32', '§38', '§38', '§54', '§38', '§38', '§38', '§38', '§32', '§30', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§54', '§54', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38', '§38']

Title 46 → Chapter I → Subchapter D → Part 38
§38.01-1 Scope of regulations—TB/ALL.
§38.01-2 Transportation of portable cylinders or portable tanks containing or having previously contained liquefied flammable gases in dry cargo spaces—TB/ALL.
§38.01-3 Incorporation by reference.
§38.01-5 Certificate of inspection—TB/ALL.
§38.05-1 Design and construction of vessels—general—TB/ALL.
§38.05-2 Design and construction of cargo tanks—general—TB/ALL.
§38.05-3 Design and construction of pressure vessel type cargo tanks—TB/ALL.
§38.05-4 Design and construction of nonpressure vessel type cargo tanks—TB/ALL.
§38.05-5 Markings—TB/ALL.
§38.05-10 Installation of cargo tanks—general—TB/ALL.
§38.05-20 Insulation—TB/ALL.
§38.05-25 Refrigerated systems—TB/ALL.
§38.10-1 Valves, fittings, and accessories—TB/ALL.
§38.10-5 Filling and discharge pipes—TB/ALL.
§38.10-10 Cargo piping—TB/ALL.
§38.10-15 Safety relief valves—TB/ALL.
§38.10-20 Liquid level gaging devices—TB/ALL.
§38.15-1 Filling of tanks—TB/ALL.
§38.15-5 Cargo hose—TB/ALL.
§38.15-10 Leak detection systems—T/ALL.
§38.15-15 Electrical installations—TB/ALL.
§38.15-20 Remote shutdowns—TB/ALL.
§38.20-1 Venting—T/ALL.
§38.20-5 Venting—T/ALL.
§38.20-10 Ventilation—T/ALL.
§38.25-1 Tests and inspections—TB/ALL.
§38.25-3 Nondestructive testing—TB/ALL.
§38.25-5 Removal of defective tanks—TB/ALL.
§38.25-10 Safety relief valves—TB/ALL.
Source: CGFR 66-33, 31 FR 15269, Dec. 6, 1966, unless otherwise noted.
(b) The transportation on deck of liquefied flammable gases in portable cylinders and tanks and the transportation of empty cylinders and portable tanks previously used shall be in accordance with the requirements of 49 CFR parts 171-179. The transportation of such containers under deck shall be in accordance with the requirements of §38.01-2.
[CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGD 86-033, 53 FR 36024, Sept. 16, 1988]
[CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGFR 68-32, 33 FR 5714, Apr. 12, 1968; CGD 74-125A, 47 FR 15231, Apr. 8, 1982; CGD 92-050, 59 FR 39666, Aug. 5, 1994]
(a) Certain standards and specifications are incorporated by reference into this part with the approval of the Director of the Federal Register in accordance with 5 U.S.C. 552(a). To enforce any edition other than the ones listed in paragraph (b) of this section, notice of change must be published in the Federal Register and the material made available to the public. All approved material is on file at 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/federal__register/code__of__federal__regulations/ibr__locations.html. All material is available from the sources indicated in paragraph (b) of this section.
4153 Arlingate Road, Caller #28518, Columbus, OH, 43228-0518
ASNT “Recommended Practice No. SNT-TC-1A (1988), Personnel Qualification and Certification in Nondestructive Testing”38.25-3(c)(2)
ASME Boiler and Pressure Vessel Code Section V, Nondestructive Examination (1986)38.25-3(a)(1)
ASTM D 4986-98, Standard Test Method for Horizontal Burning Characteristics of Cellular Polymeric Materials38.05-20
[CGD 85-061, 54 FR 50962, Dec. 11, 1989, as amended by USCG-1999-6216, 64 FR 53224, Oct. 1, 1999; USCG-1999-5151, 64 FR 67177, Dec. 1, 1999]
(d) Cargo tank spaces are to be isolated from the remainder of the vessel by cofferdams in accordance with §32.60-10 of this subchapter. In a nonpressure vessel configuration, the void between the primary and secondary barriers shall not be acceptable as the required cofferdam between the tank spaces and the main machinery spaces.
(f) Barges utilized for the carriage of liquefied gases shall be of Type II barge hull as defined in §32.63-5(b)(2) of this subchapter. The Commandant may, based on the properties of the liquefied gas to be carried, require a Type I barge hull, as defined in §32.63-5(b)(1) of this subchapter, to ensure the hull is consistent with the degree and nature of the hazard of the liquefied gas to be carried.
[CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGFR 68-82, 33 FR 18806, Dec. 18, 1968; CGFR 68-65, 33 FR 19985, Dec. 28, 1968; CGFR 70-10, 35 FR 3709, Feb. 25, 1970]
ts = tw−0.25(tw−tb) (1)
tw = Boiling temperature of gas at normal working pressure of tank but not higher than + 32 °F.
(c) Heat transmission studies, where required, shall assume the minimum ambient temperatures of 0 °F. still air and 32 °F. still water, and maximum ambient temperatures of 115 °F. still air and 90 °F. still water.
(3) Heaving L/80′ half amplitude (L/20′) in 8 seconds.
(e) Cargo tanks on barges shall be designed in accordance with §32.63-25 of this subchapter.
(d) Tanks with a service temperature of minus 20 °F. or lower and fabricated of ferritic materials shall be stress relieved.
(e) Unlagged cargo tanks, where the cargo is transported, at or near ambient temperatures, shall be designed for the vapor pressure of the gas at 115 °F. The design shall also be based on the minimum internal pressure (maximum vacuum), plus the maximum external static head to which the tank may be subjected. Whenever surrounding cargo is at a greater temperature than the maximum allowable temperature of the liquefied flammable gas tanks, the liquefied flammable gas cargo is to be such that the design pressure of the liquefied flammable gas tank is not exceeded.
(f) Where cargo tanks, in which the cargo is transported at or near ambient temperature, are lagged with an insulation material of a thickness to provide a thermal conductance of not more than 0.075 B.t.u. per square foot per degree Fahrenheit differential in temperature per hour, the tanks shall be designed for a pressure of not less than the vapor pressure of the gas at 105 °F. The insulation material shall conform to the requirements of §38.05-20. The design shall also be based on the minimum internal pressure (maximum vacuum) plus the maximum external static head to which the tank may be subjected.
(g) Cargo tanks in which the temperature is maintained below the normal atmospheric temperature by refrigeration or other acceptable means shall be designed for a pressure of not less than 110 percent of the vapor pressure corresponding to the temperature of the liquid at which the system is maintained, or the pressure corresponding to the greatest dynamic and static loads expected to be encountered either in service or during testing. For mechanically stress relieved cargo tanks, additional factors relating design pressure and maximum allowable pressure shall be as specified by the Commandant. The material of the tank shall satisfy the requirements of subchapter F (Marine Engineering) of this chapter for the service temperature, and this temperature shall be permanently marked on the tank as prescribed in §38.05-5.
[CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGFR 68-82, 33 FR 18806, Dec. 18, 1968]
(a)(1) Upon satisfactory completion of tests and inspection, pressure vessel and nonpressure vessel type cargo tanks, shall have markings as required by §54.10-20 of subchapter F (Marine Engineering) of this chapter except that for nonpressure vessel type tanks, the Coast Guard number and pressure vessel class shall be omitted.
(2) Hydrostatic test for pressure vessel type tanks shall be that specified in §38.25-1(b). In the case of nonpressure vessel type tanks, the hydrostatic test pressure shall mean the pressure specified in §38.25-1(d), while the maximum allowable pressure shall mean the maximum venting pressure as used in §38.05-4(e). Where it is not feasible to attach the nameplate to the tank, it shall be conspicuously displayed nearby.
(a)(1) Cargo tanks shall be supported on foundations of steel or other suitable material and securely anchored in place to prevent the tanks from shifting when subjected to external forces. Each tank shall be so supported as to prevent the concentration of excessive loads on the supporting portions of the shell or head as prescribed under §38.05-2(d).
(2) Cargo tanks installed in barges shall comply with the requirements of §32.63-25 of this subchapter.
(1) Liquefied flammable gas cargo tanks may be located in cargo tanks or in spaces which meet the requirements for cofferdams as defined in §30.10-13 of this subchapter. When liquefied flammable gas cargo tanks are installed in cargo tanks, such cargo tanks may be used simultaneously or separately for the carriage of flammable or combustible liquids up to and including the grade for which the cargo tanks are otherwise certified in accordance with the requirements of this subchapter.
(ii) Self-extinguishing, as determined by ASTM D 4986, “Standard Test Method for Horizontal Burning Characteristics of Cellular Polymeric Materials,” (incorporated by reference, see §38.01-3) and covered by a suitable steel cover.
[CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by USCG-1999-5151, 64 FR 67177, Dec. 1, 1999]
(a) When a liquefied flammable gas is carried below atmospheric temperature under the requirements of §38.05-3(f) or §38.05-4, maintenance of the tank pressure below the maximum allowable pressure shall be provided by one or more of the following means:
(b) A system whereby the vapors are vented to the atmosphere at sea only may be employed in conjunction with paragraph (a)(1) of this section. The pressure control valves shall be independent of the safety relief valves. See §38.20-1(j).
(b) All valves, flanges, fittings, and accessory equipment shall have a pressure rating at operating temperatures not less than the maximum allowable pressure to which they may be subjected. Piping which is not protected by a relief valve or which can be isolated from its relief valve by other valves shall be designed for the greatest of the cargo vapor pressure at 115 °F., or the maximum allowable pressure of the cargo tank, or the requirements of §38.10-10(a). Cargo liquid piping which may be subject to liquid full conditions shall be fitted with relief valves. The escape from piping systems relief valves shall be piped to a venting system or to a suitable vapor recovery system. Provision shall be made for the proper venting of all valves, fittings, etc., in which pressure buildup may occur, especially in refrigerated systems, because of an increase in product temperature.
(g) Each tank shall be provided with the necessary fill and discharge liquid and vapor shutoff valves, safety relief valve connections, refrigeration connections where necessary, liquid level gaging devices, thermometer well and pressure gage, and shall be provided with suitable access for convenient operation. Piping shall enter the cargo tanks above weather deck and as close to the top of the tank or dome as possible, except as otherwise permitted in this section. Connections to the tanks shall be protected against mechanical damage and tampering. No underdeck cargo piping shall be installed between the outboard side of the cargo containment system and the shell of the vessel, unless provision is made to maintain the minimum inspection and collision protection clearances of §38.05-10(e) between the piping and the shell. Other openings in the tanks, except as specifically permitted by the Commandant, are prohibited.
(1) A remotely controlled quick-closing shutoff valve is flanged to the tank outlet connection. The control mechanism for this valve shall meet the requirements of §38.10-5.
(a) Filling and discharge connections shall be provided with the manually operated valve required by §38.10-1(i) and with a positive acting remote controlled quick-closing valve. The remote controlled quick-closing valve shall satisfy the requirements of §38.10-1(j).
(1) The vapors evaporated by an ambient air temperature of 115 °F. plus the maximum flow rate of the cargo filling pipes or,
(2) The vapors generated under fire exposure computed using the formulas of §54.15-25(c) of subchapter F (Marine Engineering) of this chapter.
(d) The safety relief valves shall meet the arrangement and inspection requirements of §54.15-25 of subchapter F (Marine Engineering) of this chapter.
[CGFR 68-82, 33 FR 18807, Dec. 18, 1968, as amended by USCG-2014-0688, 79 FR 58280, Sept. 29, 2014]
(1) Between −20 °F. and 130 °F. for unrefrigerated service; or,
(c) All gaging devices shall be arranged so that the maximum liquid level for product being carried, to which the tank may be filled is readily determinable. The maximum gallonage capacity as required by §38.15-1 shall be:
VL = 0.98dr V/dL
(b) Nonrefrigerated tanks shall be filled so that their filling densities shall not exceed the ratios indicated in table 38.15-1(b).
(c) The “filling density” is defined as the percent ratio of the weight of the gas in a tank to the weight of water the tank will hold at 60 °F.
Table 38.15-1(b)—Maximum Permissible Filling Densities for Tanks Operating At or Near Ambient Temperature
0.473-0.480 38 41 42
0.481-0.488 39 42 43
0.489-0.495 40 43 44
0.496-0.503 41 44 45
0.504-0.510 42 45 46
0.511-0.519 43 46 47
0.520-0.527 44 47 48
0.528-0.536 45 48 49
0.537-0.544 46 49 50
0.545-0.552 47 50 51
0.553-0.560 48 51 52
0.561-0.568 49 52 53
0.569-0.576 50 53 54
0.577-0.584 51 54 55
0.585-0.592 52 55 56
0.593-0.600 53 56 57
0.601-0.608 54 57 58
0.609-0.617 55 58 59
0.618-0.626 56 59 60
0.627-0.634 57 60 61
[CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGFR 68-65, 33 FR 19985, Dec. 28, 1968]
(5) An auxiliary means of emptying the cargo tanks shall be provided in accordance with §38.10-10(d).
(b) The capacity of branch vents or vent headers shall depend upon the number of cargo tanks connected to such branch or header as provided for in the table 38.20-1(b), and upon the total safety relief valve discharge capacity.
Table 38.20-1(b)—Capacity of Branch Vents or Vent Headers
(j) Vapor discharged to the atmosphere in accordance with §38.05-25(b) shall utilize valves separate from the safety relief valves.
(a) Safety relief valves on cargo tanks in barges may be connected to individual or common risers which shall extend to a reasonable height above the deck. An alternate arrangement consisting of a branch vent header system as required by §38.20-1 may be installed. In any case, the provisions of §38.20-1 (d) through (j) shall apply.
(b) The power ventilation units shall not produce a source of vapor ignition in either the compartment or the ventilation system associated with the compartment. Inlets to exhaust ducts shall be provided and located at points where concentrations of vapors may be expected. Ventilation from the weather deck shall be provided. Ventilation outlets shall terminate away from any openings to the interior part of the vessel a lateral distance at least equal to that specified in §38.20-1(a). These outlets shall be so located as to minimize the possibility of recirculating contaminated air through the compartment.
(2) The space surrounding pressure-vessel type tanks whose piping connections are below the weather deck in accordance with §38.10-1(h).
(3) The space surrounding tanks whose manhole openings are below the weather deck in accordance with §38.05-10(f).
(4) If required by the Officer in Charge, Marine Inspection, the owner shall conduct nondestructive testing of each tank in accordance with §38.25-3.
(5) If the tank is a pressure vessel type cargo tank with an internal inspection interval of 10 years, is 30 years old or older, determined from the date it was built, the owner shall conduct nondestructive testing of that tank, in accordance with §38.25-3, during each internal inspection.
(b) If the marine inspector considers a hydrostatic test necessary to determine the condition of the tank, the owner shall perform the test at a pressure of 11⁄2 times the tank's—
(d) Nonpressure vessel type tanks shall be tested to a pressure equal to the pressure on the bottom of the tank under the design conditions listed in §38.05-4(e).
[CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGD 85-061, 54 FR 50962, Dec. 11, 1989; USCG-2014-0688, 79 FR 58280, Sept. 29, 2014]
(a) Before nondestructive testing may be conducted to meet §38.25-1 (a)(4) and (a)(5), the owner shall submit a proposal to the Officer in Charge, Marine Inspection for acceptance that includes—
[CGD 85-061, 54 FR 50963, Dec. 11, 1989]
[CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGD 95-027, 61 FR 26000, May 23, 1996]