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-3327 - What Are the Requirements for Using Internal Corrosion Direct Assessment (ICDA)? [49 CFR 192.927]

Current through Register Vol. 50, No. 6, June 20, 2024
A. Definition.
				  Internal Corrosion Direct Assessment (ICDA) is a process an operator uses to
				  identify areas along the pipeline where fluid or other electrolyte introduced
				  during normal operation or by an upset condition may reside, and then focuses
				  direct examination on the locations in covered segments where internal
				  corrosion is most likely to exist. The process identifies the potential for
				  internal corrosion caused by microorganisms, or fluid with
				  CO2, O2, hydrogen sulfide or
				  other contaminants present in the gas. [
				49
				  CFR 192.927(a)]
B. General Requirements. An operator using
				  direct assessment as an assessment method to address internal corrosion in a
				  covered pipeline segment must follow the requirements in this Section and in
				  ASME/ANSI B31.8S (incorporated by reference, see §507), Section 6.4 and
				  Appendix B2. The ICDA process described in this Section applies only for a
				  segment of pipe transporting nominally dry natural gas, and not for a segment
				  with electrolyte nominally present in the gas stream. If an operator uses ICDA
				  to assess a covered segment operating with electrolyte present in the gas
				  stream, the operator must develop a plan that demonstrates how it will conduct
				  ICDA in the segment to effectively address internal corrosion, and must provide
				  notification in accordance with §3321. A.4 or §3337. C.4 [
				49
				  CFR 192.927(b).]
C. The ICDA Plan. An operator must develop
				  and follow an ICDA plan that provides for preassessment, identification of ICDA
				  regions and excavation locations, detailed examination of pipe at excavation
				  locations, and post-assessment evaluation and monitoring. [
				49
				  CFR 192.927(c)]
1. Preassessment. In the preassessment stage,
				  an operator must gather and integrate data and information needed to evaluate
				  the feasibility of ICDA for the covered segment, and to support use of a model
				  to identify the locations along the pipe segment where electrolyte may
				  accumulate, to identify ICDA regions, and to identify areas within the covered
				  segment where liquids may potentially be entrained. This data and information
				  includes, but is not limited to: [
				49
				  CFR 192.927(c)(1)]
a. all data elements listed in Appendix A2 of
				  ASME/ANSI B31.8S; [
				49
				  CFR
				  192.927(c)(1)(i)]
b. information needed to support use of a
				  model that an operator must use to identify areas along the pipeline where
				  internal corrosion is most likely to occur (see Subsection A of this Section).
				  This information, includes, but is not limited to, location of all gas input
				  and withdrawal points on the line; location of all low points on covered
				  segments such as sags, drips, inclines, valves, manifolds, dead-legs, and
				  traps; the elevation profile of the pipeline in sufficient detail that angles
				  of inclination can be calculated for all pipe segments; and the diameter of the
				  pipeline, and the range of expected gas velocities in the pipeline; [
				49
				  CFR 192.927(c)(1)(ii)
				  ]
c. operating experience data that
				  would indicate historic upsets in gas conditions, locations where these upsets
				  have occurred, and potential damage resulting from these upset conditions; and
				  [
				49
				  CFR 192.927(c)(1)(iii)
				  ]
d. information on covered
				  segments where cleaning pigs may not have been used or where cleaning pigs may
				  deposit electrolytes. [
				49
				  CFR 192.927(c)(1)(iv)
				  ]