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API STD 594

Check Valves: Flanged, Lug, Wafer and Butt-welding

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Organization: API
Publication Date: 1 September 2004
Status: inactive
Page Count: 26
scope:

This standard 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 Tables 2A and 2B 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 Class 125 and 250 cast iron flanges as specified in ASME B16.1, between Class 150 and 300 ductile iron flanges as specified in ASME B16.42, between Class 150 - 2500 steel flanges as specified in ASME B16.5, and between Class 150 - 600 steel pipeline flanges as specified in MSS SP-44 or carbon steel flanges as specified in ASME B16.47.

Type `B' check valves are long face-to-face as defined in 4.1.2 and can be: flanged or butt-welding; steel, nickel alloy or other alloy designed for installation between Class 150 - 2500 steel flanges as specified in ASME B16.5 or for butt-welding into industry accepted piping systems.

Document History

STD 594
February 1, 2022
Check Valves: Flanged, Lug, Wafer, and Butt-welding
This standard covers the design, materials, face-to-face dimensions, pressure-temperature ratings, inspection, examination, and testing requirements for two types of check valves. Type “A” check...
API STD 594
July 1, 2017
Check Valves: Flanged, Lug, Wafer, and Butt-welding
If a product is supplied bearing the API Monogram and manufactured at a facility licensed by API, the requirements of Annex A apply. This standard covers the design, material, face-to-face...
API STD 594
September 1, 2010
Check Valves: Flanged, Lug, Wafer, and Butt-welding
This international standard covers design, material, face-to-face dimensions, pressure-temperature ratings, and examination, inspection, and test requirements for two types of check valves. — Type...
API STD 594
September 1, 2004
Check Valves: Flanged, Lug, Wafer and Butt-welding
This standard 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...
API STD 594
November 1, 1997
Check Valves: Wafer, Wafer-Lug, and Double Flanged Type
1.1 SCOPE This standard covers design, material, face-to-face dimensions, pressure-temperature ratings, and examination, inspection, and test requirements for gray iron, ductile iron, steel, and...
API STD 594
January 1, 1991
Wafer and Wafer-Lug Check Valves
A description is not available for this item.
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References

This document references:
API STD 600 - Steel Gate Valves - Flanged and Butt-welding Ends, Bolted Bonnets
Published by API on January 1, 2015
This standard specifies the requirements for a heavy-duty series of bolted bonnet steel gate valves for petroleum refinery and related applications where corrosion, erosion, and other service...
This document references:
ASME B18.15 - Forged Eyebolts
Published by ASME on August 14, 2015
This Standard is limited to dimensions and capacities for carbon steel and corrosion-resistant stainless steel, forged threaded eyebolts intended primarily for lifting applications. For carbon steel...
This document references:
MSS SP 25 - Standard Marking System for Valves, Fittings, Flanges, and Unions
Published by MSS on January 1, 2018
This standard marking system applies to the marking of new valves, fittings, flanges, and unions used in piping connections that include (but are not limited to) flanged, soldered, brazed, threaded,...
This document references:
ASME B1.1 - Unified Inch Screw Threads (UN and UNR Thread Form)
Published by ASME on January 1, 2019
This Standard specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads. (In order to emphasize that unified screw threads are based on inch modules,...
This document references:
ASME B16.11 - Forged Fittings, Socket-Welding and Threaded
Published by ASME on January 1, 2016
This Standard covers ratings, dimensions, tolerances, marking, and material requirements for forged fittings, both socket-welding and threaded, as illustrated in Tables 1 through 6 and Tables I-1...
This document is referenced by:
UFGS-33 52 43.13 - AVIATION FUEL PIPING
Published by ARMY on February 1, 2010
NOTE: This guide specification covers the requirements for piping and valves for aircraft refueling systems constructed to the requirements of the DoD Type III/IV/V, and Cut'n Cover Hydrant Refueling...
This document is referenced by:
ASME B31.3 - Process Piping
Published by ASME on January 1, 2018
Rules for the Process Piping Code Section B31.31 have been developed considering piping typically found in petroleum refineries; onshore and offshore petroleum and natural gas production facilities;...
This document is referenced by:
BS EN ISO 10438-1 - Petroleum, petrochemical and natural gas industries — Lubrication, shaft-sealing and control-oil systems and auxiliaries — Part 1: General requirements
Published by BSI on January 31, 2008
A description is not available for this item.
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