type,forged flange standard, ASTM. BS, JIS, DIN, ... Flange, Threaded Flange, Socket welding Flange, Blind Flange Pressure grade ASTM B16.5, 150LBS, 300LBS, 400LBS,600LBS, 900LBS, ... Welding Flange, Blind Flange, Orifice Flange, Ring Joint Flanges, Long Welding Neck Flange, Figure 8 Blanks Standard, ... loose plate with weld on plate collar flange Pressure Grade, PN2.5 âPN40 Standard; BS1560; Welding neck ...