Too many questions regarding pipeline flange standards
Thread Content
As is well known, there are numerous standards for pipeline flanges in **, such as GB, HG, JB, SY, SH, etc.; if dealing with external transactions, other standards may also be required. Why are there so many standards for pipeline flanges in our country? Why don’t **standardization committees establish a unified standard? After so many years of practical use, it’s entirely possible to standardize all these standards – that would reduce the amount of work by so much! To be honest, standardizing management across various industries is quite challenging as well. Everyone is welcome to join the discussion and share their opinions.
The situation you describe does indeed exist; it is the result of various industry ministries developing independently during the planned economy era, **with no timely standardization across the entire engineering sector. Standardization is necessary, but each industry standard has its own theoretical basis and calculation methods; standardization requires to be carried out at a higher level by an organization capable of managing various industries. I think the Chinese Academy of Engineering is capable of doing this.
I’m not sure if it’s the same abroad; besides ASME B16, are there any other standards in the United States?
Yes, we often encounter problems with this issue. As those who work on the internal components, we frequently have to connect them to the flanges of the tower’s piping. The different standards for selecting flanges for these piping connections require that our matching components also comply with those standards, as does the choice of bolts used. Since the quantities required are small, purchasing them becomes quite troublesome. It would be much easier if there were a unified standard.
The same is true abroad; it’s relatively fewer； For example: ANSI, ISO, JIS, DIN – they simply don’t have as many standards as we do
The general trend is toward unity, but the original poster shouldn’t be too hasty.