Selection of valve materials
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It is a high-pressure valve with a medium of H2S (47%), CO2 (50%), CH4 (1%), and N2 (1%), and a nominal pressure of 10 MPa. Can WCB be used as the valve body material, or is it necessary to line it with another material? How to choose the material for the inner components? If other valve body materials are used, how should they be selected?
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WCB can be used in the absence of water, while 316 is required when water is present
This post was last edited by xlxuiin on 2016-7-18 at 14:36. What does the remaining 1% mean? Consider the stress (HIC) corrosion problem.
Can 316 withstand H2S to damage the lining?
This post was last edited by Liu Jiajia on 2016-7-18 at 16:00. The original poster didn’t clarify the following points: 1. What about the operating temperature and design temperature? 2. What about the operating pressure and design pressure? 3. What is the composition of the remaining 1% of the medium? Is there any water? Are there chloride ions? 4. What type of valve is to be used? 5. For high-pressure valves with a nominal pressure of 10 MPa, the lining is definitely no longer suitable; it is recommended to weld STL on the sealing surface. I’ll give suggestions once the OP has met all the other requirements.
Oh, great one. . Without water and chloride ions, is there a problem with the WCB valve body of the globe valve J41Y? Should the inner components be made of 316?
The inner component of J41Y is already made of cemented carbide. No changes needed.