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Bolted cover, swing type disc Threaded or welded seat ring ASTM A216 WCB, A217 WC6, A351CF8, A351CF8M, A351 CF3, A351 CF3M, A351 CN7M Standards compliance Design and Manufacture: ANSIB16.34, API6D, BS11868 Face to face(end to end): ANSIB16.10,API6D Flanged connection: 2"~24"to ANSIB16.5,22",26"~36"to MSS-SP-44 to API605 on Request Butt welded end: ANSIB16.25 Test and inspection: API598, API6D
