How to conduct L245 welding procedure qualification?

2008-02-29View Original

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How to conduct L245 welding procedure qualification? Since the rules for welder examinations apply to Category II materials, while SY/T0452-2002 on the welding procedure qualification for petroleum and natural gas metal pipelines classifies 20# and L245 as Category I materials, I’m not sure which category they should be assigned to

Reply #22009-05-05

Make it in accordance with standard JB4708!

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How to conduct L245 welding procedure qualification?

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