... JIS, BS4504, UNI. )2) Type: WN, SO, PL, BL, THRD, LAP-JOINT, SW. 3) Process: Free Forging, Mould Forging, Upset Forging....4 ... , stainless steel 6)Slip-on, Welding Neck, Blind, Threades ,Lap-joint, Socket welding...we have enjoy great reputation in foreign trade ... slip on flange, Blind Flange,Threaded Flange,Socket-weld Flange Lap Joint Flange ,Orifice Flange,Spectacle Blind.standard ASME,JIS,ANSI,DIN ...