... DIN17440 3) EN10204 3.1 Certificate Materials, Grades (stainless steel) include:1.4301 SS, 1.4306 SS, 1.4401 SS, 1.4404 SS and 1.4541 SS etc.ASTM A182 F304 ... , SUS F316, SUS F316L, SUS F321 etcMainly Flange Standards include:1)DIN 2527 (PN6, PN10, PN16 PN25, PN40),DIN 2533, DIN ... /E/F/H Flange, BS 4504 Flange5) DIN EN 1092-1 Flange6) AS2129 FlangeSealing Surface: FF, RF, LJ, TG, FM, and ...