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English Translations » 历史存档[信息] » Welding procedure qualification

Welding procedure qualification

2015-12-05View Original

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When X70 steel pipes are welded to A105 and A350LF2 flanges respectively, is it necessary to conduct a welding procedure qualification?
Reply #22015-12-05
No, without changing the welding material
Reply #32015-12-06
If X70 material is used, is your project a long-distance pipeline? For long-distance pipelines, the welding procedure qualification shall be carried out in accordance with the standard SY/T0452‑2012 \"Welding Procedure Qualification for Metal Pipelines in Petroleum and Natural Gas Industries\" ； A105, A350 LF2, and X70 belong to the same category but different groups; for welding with A105 and A350 LF2, the welding procedure qualification for X70 can be used without the need for re-qualification.

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Translated at 2026-07-21 20:34:56

Original: https://bbs.hcbbs.com/thread-1511238-1-1.html

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