Flange selection
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Hydrogen is introduced into the reaction pressure vessel; according to clause 3.17 of the new pressure vessel regulations, is it necessary to use high-neck welded flanges? (Does a highly permeable medium include hydrogen gas?) ）
According to Appendix B of HG20583, for hydrogen media, WN flanges equipped with metal wound gaskets should be used
It is necessary to choose the right welding method, and use HG/T flanges!