... -on butt welding flanges, high-pressure flanges, threaded flange and so on2. Standard: DIN, ANSI B16.5, BS4504, JIS, GB, JB3 ... , F304,F304L,F316,F316L,F316Ti DIN: C22.8, C21, RST37.2 JIS: SS400, SF440A , SUS304,SUS304L,SUS316,SUS316L GB: Q235, 16Mn4 ...