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MSS SP 81

Stainless-Steel or Stainless-Steel-Lined, Bonnetless, Knife Gate Valves with Flanged Ends

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Organization: MSS
Publication Date: 1 January 2013
Status: inactive
Page Count: 10
scope:

This Standard Practice covers all stainless-steel or stainless-steel-lined, cast, or fabricated bonnetless, knife gate valves with flanged ends from size NPS 2 (DN 50) through NPS 36 (DN 900).

The valves identified in this Standard Practice are intended for use in applications where shock loadings are not encountered. Applications at conditions other than those specified in Section 3 require special design considerations.

Document History

SP-81
January 1, 2021
Stainless-Steel or Stainless-Steel-Lined, Bonnetless, Knife Gate Valves with Flanged Ends
SCOPE AND FIELD OF APPLICATION This Standard Practice covers all stainless-steel or stainless-steel-lined, cast, or fabricated bonnetless, knife gate valves with flanged ends from size NPS 2 (DN 50)...
SP-81
January 1, 2021
Stainless-Steel or Stainless-Steel-Lined, Bonnetless, Knife Gate Valves with Flanged Ends
A description is not available for this item.
MSS SP 81
January 1, 2017
Stainless-Steel or Stainless-Steel-Lined, Bonnetless, Knife Gate Valves with Flanged Ends
SCOPE AND FIELD OF APPLICATION  This Standard Practice covers all stainless-steel or stainless-steel-lined, cast, or fabricated bonnetless, knife gate valves with flanged ends from size NPS 2 (DN...
MSS SP 81
January 1, 2013
Stainless-Steel or Stainless-Steel-Lined, Bonnetless, Knife Gate Valves with Flanged Ends
This Standard Practice covers all stainless-steel or stainless-steel-lined, cast, or fabricated bonnetless, knife gate valves with flanged ends from size NPS 2 (DN 50) through NPS 36 (DN 900). The...
MSS SP 81
January 1, 2006
Stainless Steel, Bonnetless, Flanged Knife Gate Valves
This Standard Practice covers all stainless steel or stainless steel lined, cast or fabricated bonnetless, flanged knife gate valves in NPS 2 (DN 50) through NPS 36 (DN 900). The valves in this...
MSS SP 81
January 1, 2006
Stainless Steel, Bonnetless, Flanged Knife Gate Valves
This Standard Practice covers all stainless steel or stainless steel lined, cast or fabricated bonnetless, flanged knife gate valves in NPS 2 (DN 50) through NPS 36 (DN 900). The valves in this...
MSS SP 81
January 1, 2001
Stainless Steel, Bonnetless, Flanged Knife Gate Valves
This standard covers all stainless steel or stainless steel lined, cast or fabricated bonnetless, flanged knife gate valves in sizes NPS 2 (DN 50) through NPS 36 (DN 900). The valves in this standard...
MSS SP 81
January 1, 2000
Stainless Steel, Bonnetless, Flanged Knife Gate Valves
SCOPE AND FIELD OF APPLICATION This standard covers all stainless steel or stainless steel lined, cast or fabricated bonnetless, flanged knife gate valves in sizes NPS 2 (DN 50) through NPS 36 (DN...
MSS SP 81
January 1, 1995
Stainless Steel, Bonnetless, Flanged Knife Gate Valves
A description is not available for this item.
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References

This document references:
ASME B16.47 - Large Diameter Steel Flanges NPS 26 Through NPS 60 Metric/Inch Standard
Published by ASME on January 1, 2020
This Standard covers pressure–temperature ratings, materials, dimensions, tolerances, marking, and testing for pipe flanges in sizes NPS 26 through NPS 60. Included are flanges with rating class...
This document references:
ASME B16.5 - Pipe Flanges and Flanged Fittings NPS ½ Through NPS 24 Metric/Inch Standard
Published by ASME on January 1, 2020
(a) This Standard covers pressure–temperature ratings, materials, dimensions, tolerances, marking, testing, and methods of designating openings for pipe flanges and flanged fittings. Included are (1)...
This document references:
ASME BPVC-IX - SECTION IX QUALIFICATION STANDARD FOR WELDING, BRAZING, AND FUZING PROCEDURES; WELDERS; BRAZERS; AND WELDING, BRAZING, AND FUSING OPERATORS - WELDING, BRAZING AND FUSING QUALIFICATIONS
Published by ASME on July 1, 2017
A description is not available for this item.
This document references:
A126 - Standard Specification for Gray Iron Castings for Valves, Flanges, and Pipe Fittings
May 1, 2004
This specification covers three classes of gray iron for castings intended for use as valve pressure-retaining parts, pipe fittings, and flanges. The values stated in inch-pound units are to be...
This document references:
A240/A240M REV A - Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
November 1, 2023
This specification2 covers chromium, chromium-nickel, and chromium-manganese-nickel stainless steel plate, sheet, and strip for pressure vessels and for general applications including architectural,...
This document is referenced by:
AWWA C520 - Knife Gate Valves, Sizes 2 In. (50 mm) Through 96 In. (2,400 mm)
Published by AWWA on January 24, 2019
This standard describes bonneted, bonnetless, cast, and fabricated steel; stainless-steel; and cast ductile-iron body knife gate valves with resilient or metal seats, including tapping knife gate...
This document is referenced by:
ASME B31.12 - Hydrogen Piping and Pipelines
Published by ASME on February 1, 2020
A description is not available for this item.
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:
NAV NFGS-15217 REV C CANC NOTICE 1 - MEDICAL GAS AND VACUUM PIPING
Published by NAVY on July 3, 2001
A description is not available for this item.
This document is referenced by:
UFGS-33 63 14 - EXTERIOR BURIED PUMPED CONDENSATE RETURN
Published by NAVY on April 1, 2006
This guide specification covers the requirements for Contractor designing and providing buried factory-prefabricated preinsulated pumped condensate piping systems for server ground water conditions.
View Less
View All
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