GB/T 3091 straight seam and spiral weld

2018-03-30View Original

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Electrofusion welded pipes specified in GB/T 3091 are divided into straight-seam and spiral-seam types. Do I need to indicate whether it is a straight-seam or spiral-seam pipe when specifying the piping class? I would appreciate some guidance from experts, thank you!

Reply #22018-03-30

It should be specified, including what type of welding is used

Reply #32018-03-31

Of course it is needed; the manufacturing processes for the two are different, and so are the inspection methods

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GB/T 3091 straight seam and spiral weld

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