ANSI/API Std 594

Covers design, material, face-to-face dimensions, pressure-temperature ratings, and examination, inspection, and test requirements for two types of check valves.

Type A check valves are short face-to-face as defined in Table 3 and Table 4 and can be: wafer, lug, or double flanged; single plate or dual plate; gray iron, ductile iron, steel, nickel alloy, or other alloy designed for installation between Classes 125 and 250 cast iron flanges as specified in ASME B16.1, between Classes 150 and 300 ductile iron flanges as specified in ASME B16.42, between Classes 150 and 2500 steel flanges as specified in ASME B16.5, and between Classes 150 and 600 steel pipeline flanges as specified in MSS SP-44 or steel flanges as specified in ASME B16.47.

Type B bolted cover swing check valves are long face-to-face as defined in 5.1.2 and can be: flanged or butt-welding ends of steel, nickel alloy, or other alloy material. End flanges shall be as specified in ASME B16.5 or ends shall be butt-welding as specified in ASME B16.25.



Product Code(s): C59407,C59407

This product references:API Std 598 - Valve Inspection and Testing, Ninth Edition
API Std 600 - Steel Gate Valves - Flanged and Butt-welding Ends, Bolted Bonnets, Twelfth Edition, Includes Errata (2009)
ANSI/ASME B1.1-2003 (R2008) - Unified Inch Screw Threads, UN and UNR Thread Form
ANSI/ASME B16.1-2005 - Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 125, and 250
ANSI/ASME B16.5-2009 - Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard
ANSI/ASME B16.10-2009 - Face to Face and End-to-End Dimensions of Valves
ANSI/ASME B16.11-2009 - Forged Fittings, Socket-Welding and Threaded
ANSI/ASME B16.14-1991 - Ferrous Pipe Plugs, Bushings and Locknuts With Pipe Threads
ANSI/ASME B16.25-2007 - Buttwelding Ends
ANSI/ASME B16.34-2009 - Valves Flanged, Threaded and Welding End, Includes Supplement (2010)
ANSI/ASME B16.42-1998 (R2006) - Ductile Iron Pipe Flanges and Flanged Fittings, Classes 150 and 300
ANSI/ASME B16.47-2006 - Large Diameter Steel Flanges: NPS 26 Through NPS 60
ANSI/ASME B18.15-1985 (R2008) - Forged Eyebolts
ANSI/ASME B18.2.1-1996 (R2005) - Square and Hex Bolts and Screws - Inch Series
ASME BPVC-VIII-2010 SET - 2010 ASME Boiler Pressure Vessel Code (BPVC) - Section VIII - Pressure Vessels - COMPLETE 3-Volume SET (VIII-DIV 1, VIII-DIV 2, VIII-DIV3), Includes 2011 Addenda Reprint
ASTM A182/A182M-10 - Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service
ASTM A217/A217M-10 - Standard Specification for Steel Castings, Martensitic Stainless and Alloy, for Pressure-Containing Parts, Suitable for High-Temperature Service
ASTM A351/A351M-10 - Standard Specification for Castings, Austenitic, for Pressure-Containing Parts
ASTM A494/A494M-09e1 - Standard Specification for Castings, Nickel and Nickel Alloy
ASTM B473-07 - Standard Specification for UNS N08020, UNS N08024, and UNS N08026 Nickel Alloy Bar and Wire
ASTM B564-06a - Standard Specification for Nickel Alloy Forgings
ANSI/AWS A5.9/A5.9M:2006 - Specification for Bare Stainless Steel Welding Electrodes and Rods, 2nd Printing
ANSI/AWS A5.13:2010 - Specification for Surfacing Electrodes for Shielded Metal Arc Welding
MSS SP-6-2007 - Standard Finishes for Contact Faces of Pipe Flanges and Connecting-End Flanges of Valves and Fittings
MSS SP-25-2008 - Standard Marking System for Valves, Fittings, Flanges and Unions
MSS SP-44-2010 - Steel Pipeline Flanges, Includes Errata (May 2011)
This product referenced by:ANSI/ASME B31.9-2011 - Check Valves: Flanged, Lug, Wafer and Butt-welding, 7th Edition
This product replaces:ANSI/API Std 594 - Check Valves: Flanged, Lug, Wafer and Butt-welding, 6th Edition

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ANSI/API Std 594
ANSI/API Std 594
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