MSS SP-71 Grey iron swing check valves, flanged and threaded

Is MSS SP-71 still current?

Yes. MSS SP-71-2018 is the latest edition MechAtlas found (MechAtlas review: 27 October 2026). Check the publisher for amendments before you specify it.

What it covers

Cast iron swing check valves.

Parts that use MSS SP-71

• Check valve (USA (ASME / ASTM), main)
  Valve that lets flow pass one way and closes automatically to stop back-flow.
  Grey iron swing check, flanged and threaded.

Official source

MechAtlas does not reproduce standards. Check the official edition at the publisher's page for MSS SP-71 or the MSS store.

Other valves standards

• API 598 / ISO 5208 / EN 12266-1 Changing
  Valve inspection and pressure testing
• API 526 / 527 / 520 / ISO 4126 Current
  Relief valve dimensions, seat tightness, sizing
• API 594 Current
  Check valves: flanged, lug, wafer and butt-welding
• API 598 Current
  Valve inspection & testing
• API 600 Current
  Steel gate valves
• API 602 / 608 / 609 Current
  Compact gate, ball, butterfly valves
• API 6D Current
  Specification for valves (absorbed RP 6DR)
• ASME B16.10 / EN 558 Current
  Face-to-face dimensions
• ASME B16.34 Current
  Valves — flanged, threaded & welding end
• AWWA C504 Current
  Rubber-seated butterfly valves (water)
• BS 1868 Current
  Steel check valves, flanged and butt-welding, petroleum industry
• EN 1171 Current
  Cast iron gate valves

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