... , 1.4571, 1.4305, 1.4539, F44, F51, SUS304/304L, F304/304L, F321, F304H, F347 Stainless steel Blind Flanges 1. Standard: DIN ... .4541, 1.4571, 1.4305, 1.4539, F44, F51, SUS304/304L, F304/304L, F321, F304H, F347H, F317L, F316/316L, F316Ti... 3. Type ...