... steelASTM A105, SS400,ST37.2, ST35.3, ASTM A182 F304/304L/316/316L/321 and so ... flange, slip-on flange (SO), 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 ... 16.5, ANSI B16.36, ANSI B36.1O-ANSI B36.19, ASME B16.47 SER, B(AP1605), ASME B16, 47SER, A(MSS), ASME B16, 47SER ...