How to choose Class400 flanges, gaskets, and fasteners
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There is a project that requires valves of Class 400 grade; how should the corresponding gaskets and fasteners be selected?
This post was last edited by Thank goodness you're here on 2016-2-24 10:01. Let’s go with this level! Isn’t there any? :o The standards for gaskets and bolts/nuts of other grades should include Class 400.
How are valves connected? Welding, flanges (RF, RTJ, COMPACT). Class 400 valves are indeed rare
Valves are available in welded and flanged types
The poster can check whether the CLASS300 specifications are suitable; if not, the connection flanges, along with the corresponding gaskets and fasteners, will need to be redesigned using CLASS400 flange dimensions. :lol
Standard SH/T3406-2013 includes Class 400 flanges, and there are corresponding gasket fasteners in this series of standards as well.