flange
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The use of plate flat welding flanges and commercial-grade bolts and nuts for pipeline components used to transport flammable, combustible, and toxic liquids such as methanol and propanol does not comply with the requirements of relevant standards such as \"Steel Pipe Flanges, Gaskets, and Fasteners\" (HG/T 20592–20635-2009). I don’t see any description of this aspect in the standard? Everyone, please give me some advice!
It must also comply with industrial pipeline design standards! In case of standard conflicts, follow the strict rules!
The medium used by the poster should preferably have a sealing structure that is resistant to leaks, as leaks can cause problems; therefore, the sealing structure is important.