Standard and SpecificationDesign standard Face to face Flanges standard Working temperature Suitable mudiumDIN3356 DIN3202-F6 DIN2532 -20℃--120℃ Water DIN2533 Steam EN1092 Oil Body Bonnet Disc Disc ring Seat GasketGG25 GG25 GG25 Brass Brass NBR GGG40 GGG40 GGG40 Bronze Bronze EPDM GGG50 GGG50 GGG50 NBR EPDM flat metal flange flat metal flangeslip on flange supplier slip on flange supplierweld neck flange weld neck flangestainless socket weld flange stainless socket weld flange