... , ASTM, ASA, API-605, AWWA-C207, MSS-SP44, A105, 150LB, 300LB, 600LB, 900LB, 1500LB, 2500LB, WNRN, SORF, BLRF, THRF ... , DIN2632, DIN2633, DIN2502, DIN2543, DIN2544, DIN2566, DIN2634, DIN2545, PN6, PN10, PN16, RST37.2, CC22.8 etc.;3-British Standard ... 80(DN2000;)Type: Welding Neck Flanges, Slip-on Flanges, Blind Flanges, Threaded Flanges, Lap-Joint Flanges, Socket Welding Flanges;OD Size: 1/2 inch ...