Regarding the use of cemented carbide, namely 13Cr+HF, for gate valve internals
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Hello, everyone. I’ve checked the pipeline grade tables for a large compound and a small one; the internal components of gate valves, namely the valve cores, sometimes require cemented carbide, that is, 13Cr+HF. May I ask under what circumstances is this material needed? Is it that the pipeline itself is made of carbon steel, but the medium it carries is highly corrosive? Is it still a relatively high temperature (such as steam)? Thank you very much
Generally, when the fluid flowing through the pipeline is corrosive or highly abrasive, or when the operating conditions are severe (such as high temperatures), cemented carbide is chosen as the material for the internal components of gate valves. Cemented carbides such as 13Cr+HF (where HF refers to a fluoride-containing cemented layer) provide better corrosion and wear resistance, thereby extending the service life of valves. .
Generally, hard-sealed gate valves have sealing surfaces made of the material you mentioned.