Dimensions of Non-Metallic Flat Gaskets ASME B16.21
to be used with Raised Face flanges ASME B16.47 series A



 
CLASS 150 TO 600 NPS 26 TO 60
NPSd1d2
Class 150Class 300Class 400Class 600
26660775835832867
28711832899892914
30762883953946972
32813940100610031022
34864991105710541073
369141048111811181130
389651111105410731105
4010161162111411271156
4210671219116511781219
4411181276121912321270
4611681327127312891327
4812191384132413461391
5012701435137814031448
5213211492142914541499
5413721549149215181556
5614221607154315681613
5814731664159416191664
6015241715164516831721
NPSd1Class 150Class 300Class 400Class 600
d2
 

 

General notes:

  • Dimensions are in millimeters unless otherwise indicated.
  • d2 = Outside diameter.
  • Dimensional tolerances outside diameter: +0 / -3.0 mm.
  • Dimensional tolerances inside diameter: ± 3.0 mm.
  • Thickness (t) specified by customer.