Questions regarding the standards for low-pressure fluid transport steel pipes and straight-seam electric-welded steel pipes
Thread Content
May I ask: In what applications are welded steel pipes for low-pressure fluid transportation (GB/T3091-2008) and straight-seam electric welding steel pipes (GB/T13793-2008) used? I looked at the two standards; the previous standard explains them. This standard includes: 1. Spiral-welded submerged-arc welded steel pipes (SAWH); 2. Straight-welded submerged-arc welded steel pipes (SAWL); 3. Straight-welded high-frequency resistance welded steel pipes (ERW) ； The standard specifications mentioned later apply to straight-seam high-frequency resistance welded steel pipes (ERW). I’m confused now – doesn’t the earlier standard already include the later one? Why is it necessary to draft two standards? I would appreciate some guidance from those with more experience. Thank you!
The standards mentioned earlier are quite broad; there are several types of welded steel pipes for low-pressure fluid transport. Here, we will focus only on welded steel pipes made by straight-seam high-frequency resistance welding (ERW). Regarding ERW specifically, it depends on the GB/T13793-2008 standard
This is the typical characteristic of China: many overlaps, and even contradictions
China is a very interesting place – by formulating standards, it’s possible to employ a group of people who can receive subsidies; many standards, especially industry standards, end up being copied from one another
Referencing the answers from other users, I’m not very good at these detailed things
OP, the focus is different. Welded steel pipes for low-pressure fluid transport (GB/T3091-2008) 【This standard focuses on steel pipes produced using various welding processes for low-pressure fluid transport applications.】 】 1. Spiral-welded submerged-arc welded steel pipes (SAWH) 2. Straight-seam submerged-arc welded steel pipes (SAWL) 3. Straight-seam high-frequency resistance welded steel pipes (ERW) ； The subsequent standard, GB/T13793-2008 for straight-seam electric welded steel pipes, focuses on the welding process, which involves high-frequency resistance welding. In the 2008 version of this standard, such pipes were primarily used for idler tubes and structural steel pipes; whereas in the 2016 version, it was specified that in addition to use in structural applications, they can also be utilized for handling fluids.