Can the SH3407 and HG20631 standards be matched?
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As the title suggests, they are both American standard winding gasket standards. I’m asking whether gaskets from these two standards can be used together – please help!
The sizes are roughly the same, so they can generally be used interchangeably; for example, sh3407, DN20.pn20=56*40*28*22. For 20631, DN20, 150lb rating = 56*39.6*25.4*20.7
Among flanges, those conforming to the national standards GB9112~9124, HG20592~20635, and SH3406 can be used interchangeably as long as their pressure ratings and nominal diameters are the same. However, these flanges differ from those specified in JB74~86 of the Ministry of Machinery; many of them have different shapes, and the number of bolt holes varies as well. The flange can be substituted, as can the gasket.