Louisiana Administrative Code › Title 43 - NATURAL RESOURCES › Part XIII - Office of Conservation-Pipeline Safety › Subpart 3 - Transportation of Natural Gas or Other Gas by Pipeline: Minimum Safety Standards [49 CFR Part 192] › Chapter 33 - Gas Transmission Pipeline Integrity Management [49 CFR Part 192 Subpart O] › Section XIII-3303 - What Definitions Apply to this Chapter? [49 CFR 192.903]

Current through Register Vol. 50, No. 6, June 20, 2024
A. The following
				  definitions apply to this Chapter.
Assessment
-the use of testing techniques
					 as allowed in this Chapter to ascertain the condition of a covered pipeline
					 segment.
Confirmatory Direct Assessment
-an
					 integrity assessment method using more focused application of the principles
					 and techniques of direct assessment to identify internal and external corrosion
					 in a covered transmission pipeline segment.
Covered Segment or Covered Pipeline
					 Segment
-a segment of gas transmission pipeline located in a high
					 consequence area. The terms gas and transmission line are defined in §503
Direct Assessment
-an integrity assessment
					 method that utilizes a process to evaluate certain threats (i.e., external
					 corrosion, internal corrosion and stress corrosion cracking) to a covered
					 pipeline segment's integrity. The process includes the gathering and
					 integration of risk factor data, indirect examination or analysis to identify
					 areas of suspected corrosion, direct examination of the pipeline in these
					 areas, and post assessment evaluation.
High Consequence Area
- an area
					 established by one of the methods described in Subparagraphs a or b as
					 follows:
a. An
area
defined as:
i. a Class 3 location under §505; or
ii. a Class 4 location under §505; or
iii. any area in a Class 1 or Class 2 location where the
					 potential impact radius is greater than 660 feet (200 meters), and the area
					 within a potential impact circle contains 20 or more buildings intended for
					 human occupancy; or
iv. any area in a Class 1 or Class 2 location where the
					 potential impact circle contains an identified site.
b. The area within a potential impact circle
					 containing:
i. 20 or more buildings intended for human occupancy,
					 unless the exception in Subparagraph d applies; or
ii. an identified site.
c. Where a potential impact circle is calculated under
					 either method a. or b. to establish a high consequence area, the length of the
					 high consequence area extends axially along the length of the pipeline from the
					 outermost edge of the first potential impact circle that contains either an
					 identified site or 20 or more buildings intended for human occupancy to the
					 outermost edge of the last contiguous potential impact circle that contains
					 either an identified site or 20 or more buildings intended for human occupancy
					 (see Figure E.I.A. in
					 §5109 Appendix E).
d. If in identifying a high consequence area under Clause
					 a.iii of this definition or Clause b.i of this definition, the radius of the
					 potential impact circle is greater than 660 feet (200 meters), the operator may
					 identify a high consequence area based on a prorated number of buildings
					 intended for human occupancy within a distance 660 feet (200 meters) from the
					 centerline of the pipeline until December 17, 2006. If an operator chooses this
					 approach, the operator must prorate the number of buildings intended for human
					 occupancy based on the ratio of an area with a radius of 660 feet (200 meters)
					 to the area of the potential impact circle (i.e., the prorated number of
					 buildings intended for human occupancy is equal to 20 x (660 feet) [or 200
					 meters]/ potential impact radius in feet [or
					 meters]2).
Identified Site
-each of the following
					 areas:
a. an outside area or open structure that is occupied by 20
					 or more persons on at least 50 days in any 12 month period. (The days need not
					 be consecutive.) Examples include but are not limited to, beaches, playgrounds,
					 recreational facilities, camping grounds, outdoor theaters, stadiums,
					 recreational areas near a body of water, or areas outside a rural building such
					 as a religious facility); or
b. a building that is occupied by 20 or more persons on at
					 least five days a week for 10 weeks in any 12 month period. (The days and weeks
					 need not be consecutive). Examples include, but are not limited to, religious
					 facilities, office buildings, community centers, general stores, 4-H
					 facilities, or roller skating rinks); or
c. a facility occupied by persons who are confined, are of
					 impaired mobility, or would be difficult to evacuate. Examples include but are
					 not limited to hospitals, prisons, schools, day-care facilities, retirement
					 facilities or assisted-living facilities.
Potential Impact Circle
-a circle of radius
					 equal to the potential impact radius (PIR).
Potential Impact Radius
(PIR)-the radius
					 of a circle within which the potential failure of a pipeline could have
					 significant impact on people or property. PIR is determined by the formula r =
					 0.69 * [square root of (p*d2)], where 'r' is the
					 radius of a circular area in feet surrounding the point of failure, 'p' is the
					 maximum allowable operating pressure (MAOP) in the pipeline segment in pounds
					 per square inch and 'd' is the nominal diameter of the pipeline in
					 inches.
NOTE: 0.69 is the factor for natural gas. This number will
					 vary for other gases depending upon their heat of combustion. An operator
					 transporting gas other than natural gas must use Section 3.2 of ASME/ANSI
					 B31.8S incorporated by reference, see §507) to calculate the impact radius
					 formula.
Remediation
-a repair or mitigation
					 activity an operator takes on a covered segment to limit or reduce the
					 probability of an undesired event occurring or the expected consequences from
					 the event.
AUTHORITY NOTE:
					 Promulgated in accordance with
					 R.S. 30:501
					 et seq.