Material: 1.4301, 1.4307, 1.4401, 1.4404, 1.4541, 1.4571, ... 4539, F44, F51, SUS304/304L, F304/304L, F321, F304H, F347 Stainless steel Blind Flanges 1. Standard: DIN, ANSI/ASME B16.5 ... 1, HG, UNI, JIS, NFE, GB, BS... 2. Material: 1.4301, 1.4307, 1.4401, 1.4404, 1.4541, 1.4571 ... flange. Our annual productioni comes to 5000 tons of the stainless steel flanges, duplex flange and alloy steel flange, which can ...