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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 2017
Status: active
Page Count: 10
scope:

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) 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:
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:
A216/A216M - Standard Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High-Temperature Service
September 1, 2021
This specification2 covers carbon steel castings for valves, flanges, fittings, or other pressure-containing parts for high-temperature service and of quality suitable for assembly with other...
This document references:
A276/A276M - Standard Specification for Stainless Steel Bars and Shapes
January 1, 2024
This specification covers hot-finished or cold-finished bars except bars for reforging (Note 1). It includes rounds, squares, and hexagons, and hot-rolled or extruded shapes, such as angles, tees,...
This document is referenced by:
MSS SP 111 - Gray-Iron and Ductile-Iron Tapping Sleeves
Published by MSS on January 1, 2020
This Standard Practice covers the performance and design requirements of gray-iron or ductile-iron tapping sleeves used in water and sewage systems. Tapping sleeves are used with tapping valves to...
This document is referenced by:
SP-67 - Butterfly Valves
Published by MSS on January 1, 2022
This Standard Practice covers dimensions, design, testing, and marking requirements for butterfly valves. Further reference should be made to the MSS SP-68. This Standard Practice covers two types of...
This document is referenced by:
B16.10 - Face-to-Face and End-to-End Dimensions of Valves
Published by ASME on June 20, 2022
General Application. This Standard covers face-to-face and end-to-end dimensions of straightway valves, and center-to-face and center-to-end dimensions of angle valves. Its purpose is to ensure...
This document is referenced by:
MSS SP 154 - Low Pressure Knife Gate Valves for Double Block and Bleed
Published by MSS on January 1, 2018
SCOPE AND FIELD OF APPLICATION This Standard Practice covers stainless-steel-lined, cast, or fabricated bonnetless, low pressure knife gate valves that are designed and manufactured to serve as a...
This document is referenced by:
MSS SP 80 - Bronze Gate, Globe, Angle, and Check Valves
Published by MSS on January 1, 2019
This Standard Practice establishes requirements for bronze gate, globe, angle, and check valves for general purpose services and provides requirements for the following: a) Pressure-Temperature...
View Less
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