Gasket Dimensions for ANSI/ASME, DIN EN and AWWA pipe flanges Full Face Gaskets for flat face flanges ANSI B16.21 – Class 75 ANSI B16.21 – Class 150 ANSI B16.21 – Class 300 ANSI B16.21 – Class 400 ANSI B16.21 – Class 600 ANSI B16.21 – Class 900 DIN-EN PN6 to PN40 AWWA C207 & C228 Class B, D & E AWWA C207 & C228 Class F Menu ANSI B16.21 – Class 75 ANSI B16.21 – Class 150 ANSI B16.21 – Class 300 ANSI B16.21 – Class 400 ANSI B16.21 – Class 600 ANSI B16.21 – Class 900 DIN-EN PN6 to PN40 AWWA C207 & C228 Class B, D & E AWWA C207 & C228 Class F Ring Gaskets for raised face flanges ANSI B16.21 – Class 75 ANSI B16.21 – Class 150 ANSI B16.21 – Class 300 ANSI B16.21 – Class 400 ANSI B16.21 – Class 600 ANSI B16.21 – Class 900 DIN-EN PN2.5 to PN63 AWWA C207 & C228 Class B, D & E AWWA C207 & C228 Class F Menu ANSI B16.21 – Class 75 ANSI B16.21 – Class 150 ANSI B16.21 – Class 300 ANSI B16.21 – Class 400 ANSI B16.21 – Class 600 ANSI B16.21 – Class 900 DIN-EN PN2.5 to PN63 AWWA C207 & C228 Class B, D & E AWWA C207 & C228 Class F Spiral Wound Gaskets for flat & raised face flanges ANSI B16.20 Class 150 to 2500 Menu ANSI B16.20 Class 150 to 2500