Design and Manufacture:Casst steel check valve to BS 1868、ASME B 16.34 and API 6D; Forged steel check valve to API 602.Inspection and Test: API 598.End flange dimension: ASME B 16.5 (for NPS≤24); ASME B 16.47 series B、API 605 or ASME B16.47 Series A、MSS SP-44(for NOS>24).BW end dimension:  ASME B 16.25.Socket-weld dimension: ASME B16.11.Face to face and end to end: ASME B16.34.Pressure-temperature ratings: ASME B16.34.Wall thickness dimension: API 600 and BS 1868.
 

Swing Check Valves, lift check valves, piston check valves Standard compliance 1) Design and manufacture: API6D, ANSI B16.34, BS1868 2) Test and inspection: API598 3) Face to face dimensions: ANSI B16.10 4) Flanged end: ANSI B16.5, B16.47 SERIES A & SERIES B 5) Butt-welding end: ANSI B16.25 6) Other standards (DIN, BS, JIS) is also available upon request. Specifications: 1) Size: 2" to 36" 2) Class: 150LB to 2500LB