Regarding the distance between pipe fittings
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For pipes with a DN of 150 mm or more, the minimum distance between the straight sections ahead of and behind two elbows is 150 mm. Is it not appropriate to use the same 150 mm value for the straight sections between elbows in pipes with a DN of 500 mm? How should the minimum distance between such large-diameter pipe fittings be determined?
I think it’s sufficient to avoid the heat-affected zone; there are also those that are connected directly. That standard simply specifies the weld spacing; it is neither mandatory nor derived through calculation. I have questions regarding the minimum weld spacing for pipes; please ask the piping experts! Haichuan Chemical Forum Website - https://bbs.hcbbs.com/thread-1101707-1-1.html
GB 50184-2011 \"Code for Acceptance of Construction Quality of Industrial Metal Piping Projects\" specifies requirements regarding weld spacing, as shown in the figure below:
This seems to be a requirement only for short pipes; there are no fittings, right?
I think these specifications aren’t detailed enough. According to the rules, for pipes with a DN of 150 mm or more, the straight section between two elbows should be at least 150 mm long. For pipes with a DN of 1500 mm, it is sufficient to leave a straight section of 200 mm between the two elbows, but in practice, no such 200-mm straight section is provided.
I think these specifications aren’t detailed enough. According to the standards, for pipes with a DN of 150 mm or more, the straight section between two elbows should be at least 150 mm long. For pipes with a DN of 1500 mm, it is sufficient to leave a straight section of 200 mm between the elbows, but in practice, no such straight section of 200 mm is provided.
:Lol, that’s usually the requirement. . But it’s inevitable, and it doesn’t matter