Regarding whether 20# steel pipes can be welded together according to GB6479 and GB/T8163
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Can 20# steel pipes according to GB6479 and GB/T8163 be welded together? Seeking help from the great deity.
Welding them together is no problem. However, where it is used after welding matters.
Guessing what the original poster means, it’s likely that the materials specified in GB6479 are not available for now, so they want to use GB/T8163 as a substitute. I don’t know if my guess is correct. It’s better not to use substitution; 6479 substituted by 8163 is okay, but the reverse might cause problems, after all, 6479 involves more aspects such as manufacturing methods, delivery conditions, and testing procedures.
All the materials are 20# steel; as long as the outer diameter is the same, they can be welded together. Welding depends mainly on the material
It’s okay during welding; 6479 is higher than 8163
It is possible during welding, but it only applies to using 6479 in place of 8163