Regulators require minimum federal safety standards for pressure uprating as described in 49 CFR Part 192 Subpart K. Pipeline uprating to a pressure that will produce a hoop stress of 30% or more of SMYS in steel pipelines require a series of documented integrity assessments to ensure the pressure uprating will not adversely affect the safe operation. The objective of this paper is to disseminate a process that operators can use to develop an effective integrity assessment guide for pressure uprating. This guide exceeds the requirements established in §192.555. The combination of External Corrosion Direct Assessment (ECDA), In-Line Inspection (ILI), and hydrostatic testing is used in conjunction to identify a variety of time dependent and time independent threats. A systematic approach for chronological implementation of assessment types for pressure uprating has been validated through a successful case study.

Subject
Electric current, Indirect inspection, External corrosion direct assessment, Piping, Walls, Hydrostatic pressure, Pipelines, Tools, Gas pressure, Rectifiers, Anomalies, Maximum Allowable Operating Pressure, Case studies
Keywords:
Pressure Uprating, Fitness-for-Service, Subpart K, ECDA, ILI, Hydrotest, Case Study
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2022
Association for Materials Protection and Performance (AMPP)
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