Selection of hydrogen gasket materials
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In accordance with the provisions of the \"Design Code for Hydrogen Stations\" GB50177, when the hydrogen pressure is greater than 2.5 MPa, metal wound gaskets should be used； So here comes the question: when the temperature is below 200 degrees, it is acceptable to use polytetrafluoroethylene as the filler for wound gaskets. But at 300 degrees, polytetrafluoroethylene is no longer suitable; in this temperature range, can flexible graphite be used as the filler for wound gaskets?
Directly used flexible graphite can meet the requirements
Just go with the highest one; if the leader agrees, :L
Who said that gasketing can only be made of tetrafluoroethylene?
So, if the leader agrees, haha
It is recommended to take a look at HG20610, Table 3.0.3: Flexible graphite strip –200～+650℃.
When the temperature reaches 300 degrees, annealed copper gaskets can be used, as specified in Table 12.0.4 of GB50177
I would like to know where, in a hydrogen station, are the gaskets that come into contact with hydrogen located at temperatures above 300 degrees?