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Selection of gas pipeline valves

2018-01-02View Original

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Everyone, when I read books on gas pipelines before, I learned that gate valves are valves specifically designed for gas use, and they are gray cast iron valves with a PN1 rating. But now, regulation 50316 specifies that gray cast iron cannot be used in pipes for toxic or flammable substances. I would like to ask what kind of valves are currently used in gas pipes, and what is the pressure rating of those valves?

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