Qualification of High-Strength Linepipes for Hydrogen Transportation based on ASME B31.12 Code
A number of CPW manufactured HFW and SAWL pipes were tested for fracture toughness properties in high pressure 100% hydrogen environment. All tests were performed in RINA laboratory, following a developed test procedure based on code ASME B31.12 Option B (qualification of the material threshold stress intensity factor KIH). Testing involved API 5L grades of quality X60M to X70M, with a hydrogen test pressure of 80bar and varying applied stress intensity factors 110-145 MPa·√m.
Following a test exposure of 1000h, all parent material, weld and HAZ specimens presented an excellent resistance to hydrogen embrittlement showing no measurable crack propagation from the fatigue pre-crack front. Based on the results, a KIH value of 55 MPa·√m and above was established in all cases, fulfilling the minimum qualification criteria of ASME B31.12 Option B
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Pipeline Technology Journal 1/2021
Issue 1/2021 of ptj is the first issue of the Pipeline Technology Journal in 2021
On its 60 pages this issue will discuss several topics. From the opportunities to Access the benefits of High-Frequency Welded pipes to the qualification of High-Strength Linepipes for hydrogen transportation. This issue contains 4 papers from different companies.