... welding flange, socket welding flange, lap joint flange (LJF), welding neck flange (WNF), blind flange, orifice flange, reducing flange, pad type flange, loose hubbed flange, welding plate flange, etc. 2. Flange ... , A403 WP304, 304L, 316, 316L, 310, etc. 6. Flange Executive Standards: ANSI/ASME B16.5, DIN, JIS, GB, ASTM, JB, API 7 ...