MSS Standards for individual purchase

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  • Integrally Reinforced Forged Branch Outlet Fittings - Socket Welding, Threaded, and Buttwelding Ends

    Standard [CURRENT] 2025

    MSS SP-97:2025

    Integrally Reinforced Forged Branch Outlet Fittings - Socket Welding, Threaded, and Buttwelding Ends

    This Standard Practice includes essential dimensions, finish, tolerances, testing, marking, material, and minimum strength requirements for 90° and 45° integrally reinforced forged branch outlet ...

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  • Valves for Cryogenic Service, Including Requirements for Body/Bonnet Extensions

    Standard [CURRENT] 2025

    MSS SP-134:2025

    Valves for Cryogenic Service, Including Requirements for Body/Bonnet Extensions

    This Standard Practice covers additional requirements for material, design, dimensions, fabrication, non-destructive examination, and pressure testing of metallic valves intended for service at ...

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  • Valves for Use in Hydrogen Peroxide Service

    Standard [CURRENT] 2025

    MSS SP-150:2025

    Valves for Use in Hydrogen Peroxide Service

    This Standard Practice contains requirements for material, design, fabrication, pressure testing, marking, and preparation for shipment of valves for use in hydrogen peroxide (H2)O2))service.

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  • Protection of Valves, Fittings, and Actuators from Damage during Surface Preparation and Application of Coatings

    Standard [CURRENT] 2025

    MSS SP-164:2025

    Protection of Valves, Fittings, and Actuators from Damage during Surface Preparation and Application of Coatings

    This Standard Practice outlines the general requirements for protecting sensitive external components and surface areas of valves, fittings, and actuators from damage during surface preparation ...

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  • Quality Standard for Steel Castings for Valves, Flanges, Fittings, and Other Piping Components - Radiographic Examination Method

    Standard [CURRENT] 2025

    MSS SP-54:2025

    Quality Standard for Steel Castings for Valves, Flanges, Fittings, and Other Piping Components - Radiographic Examination Method

    This Standard Practice provides methods and acceptance standards for the film method of radiographic examination of steel castings for valves, flanges, fittings, and other piping components. This ...

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  • Qualification Requirements for Elastomer Diaphragms for Nuclear Service Diaphragm Valves

    Standard [CURRENT] 2025

    MSS SP-100:2025

    Qualification Requirements for Elastomer Diaphragms for Nuclear Service Diaphragm Valves

    This Standard Practice delineates a method for qualification of elastomer diaphragms, in accordance with methodology and documentation as described in Appendix QR-B of ASME QME-1, that are ...

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  • Cast Copper Alloy Flanges and Flanged Fittings: Class 125, 150, and 300

    Standard [CURRENT] 2025

    MSS SP-106:2025

    Cast Copper Alloy Flanges and Flanged Fittings: Class 125, 150, and 300

    This Standard Practice establishes requirements for cast copper alloy flanges and flanged fittings having dimensions, ratings, and materials not included in ASME B16.24. Specifically, this ...

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  • Quality Standard for Steel Castings Used in Standard Class Steel Valves - Sampling Method for Evaluating Casting Quality

    Standard [CURRENT] 2025

    MSS SP-147:2025

    Quality Standard for Steel Castings Used in Standard Class Steel Valves - Sampling Method for Evaluating Casting Quality

    This Standard Practice provides minimum guidance for the quality of pressure containing steel castings used in the manufacture of standard class, cast valves compliant with ASME B16.34. It covers ...

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  • Cable Suspension of Pipe - Materials, Selection, Application, and Installation

    Standard [CURRENT] 2025

    MSS SP-163:2025

    Cable Suspension of Pipe - Materials, Selection, Application, and Installation

    This Standard Practice establishes the selection, specification, installation, materials, and testing of fixings and suspension systems for cable used to suspend pipe.

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  • Quality Standard for Iron and Steel Castings for Valves, Flanges, Fittings, and Other Piping Components - Visual Method for Evaluation of Surface Irregularities

    Standard [CURRENT] 2025

    MSS SP-55:2025

    Quality Standard for Iron and Steel Castings for Valves, Flanges, Fittings, and Other Piping Components - Visual Method for Evaluation of Surface Irregularities

    This Standard Practice is intended to supplement the requirements of ASTM Specifications A216/A216M, A217/A217M, A351/A351M, A352/A352M, A389/A389M, A487/A487M, and A744/A744M and provide a series ...

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