The use of carbon steel pipelines lined or clad with corrosion resistant alloys (CRAs) is increasing in the oil and gas (O&G) industry. These pipelines combine the mechanical properties of carbon steel with the corrosion resistance of CRAs. Some CRAs such as AISI 316L (UNS 31603) are not pre-qualified according to ANSI/NACE MR0175/ISO 15156 part 3. A note in table A.2 of the standard specifies that AISI 316L (UNS 31603) “shall be free from cold work caused by shaping, forming, cold reducing, tension, expansion, etc. after the final solution annealing and quenching treatment”. During installation in the reeling process, these pipes are subjected to cold deformation caused by cycles of compression and tension. Therefore, UNS 31603 liner or clad material must be qualified according to ISO 15156-3. These pipes are additionally welded with girth and longitudinal welds. This paper presents an approach to simulate the effect of the reeling process (cold deformation) during the qualification of UNS 31603 lined and clad pipes. This approach is in line with DNV ST-F101 which refers to DNV RP-F108. Throughout this paper, the methodology is described and the learnings are discussed.

Subject
Test methods, Materials, Piping, Modeling, Gauges, Pipelines, Installation, Buckling, Bending, Steel, Scale, Carbon steel, Stress corrosion cracking
Keywords:
Production pipelines, Stress Corrosion Cracking, Hydrogen Sulphide, Carbon Dioxide, Lined Pipes, Clad Pipes
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2023
Association for Materials Protection and Performance (AMPP)
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