MSS Standards for individual purchase

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  • Butterfly Valves

    Standard [CURRENT] 2022

    MSS SP-67:2022

    Butterfly Valves

    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 ...

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  • Bellows Seals for Instrument Valves

    Standard [CURRENT] 2022

    MSS SP-130:2022

    Bellows Seals for Instrument Valves

    This Standard Practice provides requirements for valve packings, packing chambers, and associated components as they relate to the total packing assembly of instrumentation valves. This Standard ...

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  • Weld-Fabricated, Copper Solder-Joint Pressure Fittings

    Standard [CURRENT] 2022

    MSS SP-109:2022

    Weld-Fabricated, Copper Solder-Joint Pressure Fittings

    This Standard Practice covers factory-made, weld-fabricated, copper pressure fittings in nominal sizes 1/4 through 12. Included in this Standard Practice are: a) Pressure-temperature ratings; b) ...

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  • Wrought Copper, Solder-Joint Pressure Fittings

    Standard [CURRENT] 2022

    MSS SP-104:2022

    Wrought Copper, Solder-Joint Pressure Fittings

    This Standard Practice covers seamless wrought-copper fittings in nominal size 1/8 through 8, straight and reducing size, with solder-joint or threaded-end connections, and for use with copper ...

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  • Connecting Flange Joints between Tapping Sleeves and Tapping Valves

    Standard [CURRENT] 2021

    MSS SP-60:2021

    Connecting Flange Joints between Tapping Sleeves and Tapping Valves

    The purpose of this Standard Practice is to prevent interface and interference problems between tapping sleeves and tapping valves through the use of a positioning recess and mating raised face of ...

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  • Quality Standard for Evaluation of Cast Surface Finishes - Visual and Tactile Method

    Standard [CURRENT] 2021

    MSS SP-112:2021

    Quality Standard for Evaluation of Cast Surface Finishes - Visual and Tactile Method

    This SP must be used with a 10-surface, three dimensional Cast Surface Comparator, which is a necessary part of the Standard. This surface quality Standard Practice provides criteria for the ...

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  • Connecting Joints between Tapping Machines and Tapping Valves

    Standard [CURRENT] 2021

    MSS SP-113:2021

    Connecting Joints between Tapping Machines and Tapping Valves

    This Standard Practice covers the dimensions which define the interface between drilling/tapping machine adapters and tapping valves (known as a "joint"); including clearances for the pilot drill ...

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  • Supplemental High-Pressure Gas Test Procedures for Valves

    Standard [CURRENT] 2021

    MSS SP-158:2021

    Supplemental High-Pressure Gas Test Procedures for Valves

    The purpose of this Standard Practice is to provide a testing protocol to be applied to valves requiring supplementary high-pressure gas testing because of hazardous, unique, or severe service ...

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  • High Pressure Butterfly Valves with Offset Design

    Standard [CURRENT] 2021

    MSS SP-68:2021

    High Pressure Butterfly Valves with Offset Design

    This Standard Practice covers design requirements, test performance, marking requirements, and nomenclature for butterfly valves designed for high pressure performance, having a seat plane offset ...

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  • High Pressure Knife Gate Valves

    Standard [CURRENT] 2021

    MSS SP-135:2021

    High Pressure Knife Gate Valves

    This Standard Practice covers the construction requirements for lug- and wafer-type knife gate valves made from ASME Code materials and meeting the applicable gate valve requirements of ASME B16.34.

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