What type of gasket should be used at the flange connections of gas pipelines?
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I see in the specifications that for gas pipelines, plate-type butt weld flanges cannot be used, nor can hex head bolts or type I nuts; instead, fully threaded studs with type II nuts should be used. But how should the gaskets be chosen? The only thing I’m sure of is that asbestos or non-asbestos gaskets cannot be used! Could you provide the source for a gas pipeline gasket?
Can I use a gasket? I don’t quite understand either…
I saw on the internet that the commonly used materials are polytetrafluoroethylene, graphite, and wound gaskets; I wanted to find out where it’s mentioned, in which standards or manuals
May I ask the original poster, which standard is this? Can’t use hex head bolts? What does this expression mean?
It is mentioned in HG20614 that hex head bolts and double head bolts are used for non-flammable and non-toxic pipeline systems; gas pipelines, on the other hand, involve highly hazardous media that are flammable
Hello. In real-life applications, as long as the gas is not in a high-temperature environment, that is, below 100° Celsius, asbestos boards are often used. In high-temperature environments, graphite packing is typically employed. Polytetrafluoroethylene, as you mentioned, is too expensive; it is generally used in environments with highly corrosive substances. Tangshan Lvyuan Environmental Protection specializes in gas generators, so it has some practical experience in this area: hug: