Who knows the standards for this type of high-pressure grooved gate valve?
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http://img2.goepe.com/2018036/2_1522303518_8161.jpg In this groove-shaped form. According to the customer, it was imported from abroad. No corresponding standards can be found online. Does anyone know what the standard is? It is used in coal mines.
There are no valves; only a single standard is applied. The uniqueness of this type of valve lies only in its connection method; as for other standards such as dimensions, materials, and testing, the appropriate standards still need to be followed. The relevant national standards for this type of connection are GB/T 36019-2018 \"Technical Specifications for Grooved Pipe Fittings\" and GB 5135.11-2006 \"Sprinkler Systems – Part 11: Grooved Pipe Fittings\". It is not clear which country’s standards the imported valves follow.