... DIN, EN1092-1, JIS, BS4504, UNI. )2) Type: WN, SO, PL, BL, THRD, LAP-JOINT, SW. 3) Process: Free Forging, Mould Forging ... steel 6)Slip-on, Welding Neck, Blind, Threades ,Lap-joint, Socket welding...we have enjoy great reputation in foreign trade ... A182-F316, A403WP304, A403-WP317Lpressure 150bls-2500blsface type Flat Face,Raised Face,Ring Joint Face,Lapped Joint Face,Male- Female etc.used in Oil ...