How to choose the welding heat treatment method and inspection level?
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In the design, welding is usually required at the elbow or flange. How to choose the welding method? What kind of heat treatment method should be used under what circumstances? What are the inspection levels of pipelines? Under what circumstances are they used? How to conduct hydraulic pressure test and air tightness inspection? Under what circumstances should a hydrostatic test be performed? What pressure should be used for water pressure and air tightness inspection? If anyone knows about it, can he explain it to me or tell me which specification manual I can find it in? ! Thank you all!
Please refer to GB 50236 GB50235, design drawing requirements (such as test pressure), and the construction unit's welding process instructions (welding requirements).