butt weld pipe fitting,screwed flange,cap, elbow, reducer, tee, stub end material,cs ... tee, reducer tee, bends, concentric reducer, eccectric reducer, screwed flange, cap, stub end MATERIAL carbon steel, stainless steel, alloy ... steel, some specialSTANDARD ANSI, ASME, API5L, DIN, JIS, BS, GB, or probuce according ... , API, CCS, CE, TUV stainless steel screwed flange