Material: 1.4301, 1.4307, 1.4401, 1.4404, 1.4541, 1.4571, 1.4305, 1.4539, F44, F51, SUS304/304L, F304/304L, F321, F304H, F347 1. Standard: DIN, ANSI/ASME B16 ... annual productioni comes to 5000 tons of the stainless steel flanges, duplex flange and alloy steel flange, which can be used ... , oil and gas industry, space, machinery accessory etc... Stainless steel Blind Flanges