... . ANSI B16.5 150LBS (300LBS, 600LBS, 900LBS,1500LBS, 2500LBS) Blind/ Slip-on/ Welding Neck/ Plate/ Socket weld/ Threaded/ Lap Joint FlangeANSI ... ) Blank Flange, DIN 2573 PN 6 and DIN 2576 PN10 Slip on Welding Flanges, DIN 2631 PN6, DIN 2632 PN10, DIN ...