I would appreciate it if experts could help me understand the differences between these standards
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Hello everyone, when designing low and medium pressure pipelines for oil fields, seamless pipes with a diameter of DN200 or less follow the GBT8163 standard, while pipes with a diameter of DN250 or more use welded steel pipes in accordance with the GBT9711 standard. Although GBT9711 also covers seamless steel pipes, why isn’t this standard used for all pipes, and why is GBT8163 applied to pipes with a diameter of DN200 or less? For seamless steel pipes, what is the difference between 8163 and 9711? The same issue applies here: GBT19672 specifies the structural types and technical requirements for gate valves, ball valves, etc., while GBT12234, 12235, etc. also establish such requirements respectively. There are also ASME A106 and API 5L; ASME A106 is used for process pipelines, while API 5L is used for transmission pipelines. I spent a long time trying to figure out the difference between them, but I still didn’t understand it. I’m just starting to learn *pipeline design, and there are many things I don’t understand – what are the differences between these standards? What is their respective role? I would appreciate it if everyone could offer some guidance. Thank you.
It can only be said that the standard system is rather chaotic; it’s better to follow strict standards
There’s no use forcing the application of these so-called standards
But in design, it is always necessary to specify the execution standards; for example, if I choose a gate valve, I follow the GBT12234 standard – why not the GBT19672 standard? I’m confused because I can’t figure out this issue
Simply put, the former is a performance standard for gate valves, while the latter is a more general standard for pipeline valves.
Thank you for your advice. Does that mean we should prioritize implementing standard GBT12234? If that’s the case, under what circumstances is GBT19672 used?