Bolts and nuts for flange pairing

2009-11-23View Original

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I currently have two standards at my disposal: HG20593 and HGT 20592~20635-2009 for steel pipe flanges, gaskets, and fasteners. However, the requirements for selecting nuts and bolts to pair with these flanges differ between these standards. Which standard should be followed? For example, one is M12 and the other is M16; there is always a difference of one grade between them

Reply #22009-11-24

Depending on your process design choice, the flange specified in the process design will be either HG20593-97 or HG/T20592-20635-2009; once the flange is determined, the fasteners are also determined. HG/T20592-20635-2009 is the latest flange standard; the original version from 1997 is still in use as well.

Reply #32009-11-24

However, the version 09 is only applicable to those with PN2.5 or higher; for PN1.6, only the data from 1997 is available. 2# houhairui

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Bolts and nuts for flange pairing

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