... -American Standard:ANSI B 16.5, ASTM, ASA, API-605, AWWA-C207, MSS-SP44, A105, 150LB, 300LB, 600LB, 900LB, 1500LB, 2500LB, WNRN ... , GOST12820-80, 12821-80, 2 1/2 (DN15) TO 80(DN2000;)Type: Welding Neck Flanges, Slip-on Flanges, Blind Flanges, Threaded ...