Manufacturers Standardization Society (MSS) Datasheets for Standards and Technical Documents
Standards and technical documents includes standards, codes, regulation, handbooks, manuals, comprehensive guides and other formal publications. Standards, codes, and regulation establish uniform specifications, procedures or technical criteria.
Standards and Technical Documents: Learn more
| Product Name | Notes |
|---|---|
| Ball Valves Threaded, Socket-Welding, Solder Joint, Grooved and Flared Ends This Standard Practice covers round opening, full, regular and reduced port metal ball valves. End connections covered herein are threaded,... | |
| Ball Valves with Flanged or Butt-Welding Ends for General Service This Standard Practice covers flanged or butt weld end ball valves having in general, but not restricted to, round openings... | |
| Bellows Seals for Globe and Gate Valves This Standard Practice covers requirements for design, materials, fabrication, installation, qualification, examination, testing, and shipment of metal bellows and/or bellows assemblies to be... | |
| Bellows Seals for Instrument Valves This Standard Practice provides requirements for design, materials, fabrication, installation, qualification, examination, testing, and shipment of convoluted metal bellows or bellows assemblies to be installed... | |
| Bracing for Piping Systems Seismic-Wind-Dynamic Design, Selection, Application Piping systems shall be protected to reduce the risk of piping overstress where subject to seismic, wind and other dynamic forces. This... | |
| Bronze Gate, Globe, Angle, and Check Valves This MSS Standard Practice establishes requirements for bronze gate, globe, angle, and check valves in Classes 125 (PN 20), 150, 200, 300 (PN... | |
| 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... | |
| Bypass and Drain Connections This Standard Practice establishes requirements for connections to valves and fittings to accommodate drains and bypasses in all pressure classes. Specific requirements are: a) Standard symbols... | |
| 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 hav-ing dimensions, ratings, and materials... | |
| Class 150LW Corrosion Resistant Cast Flanges and Flanged Fittings This Standard Practice establishes a series of cast austenitic stainless steel flanged fittings and austenitic stainless steel flanges of reduced weight... | |
| Class 3000 Steel Pipe Unions Socket Welding and Threaded This Standard Practice establishes envelope and other essential dimensionals, finish, tolerances, testing, marking, material, and minimum performance requirements for forged carbon... | |
| Compact Steel Globe & Check Valves - Flanged, Flangeless, Threaded & Welding Ends (Chemical & Petroleum Refinery Service) This Standard Practice covers flanged end, flangeless end, threaded end, socket-welding end,... | |
| Compression Packing Systems 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. | |
| 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... | |
| Copper Alloy Gate, Globe, Angle, and Check Valves for Low Pressure/Low Temperature Plumbing Applications This MSS Standard Practice establishes requirements for copper alloy gate, globe, angle, and check valves used... | |
| Copper-Nickel Socket-Welding Fittings and Unions This Standard Practice establishes requirements for copper-nickel socket-welding fittings, NPS 1/4 through 12, (or as noted), for use with pipe manufactured to one of the... | |
| Corrosion Resistant Gate, Globe, Angle and Check Valves with Flanged and Butt Weld Ends (Classes 150, 300 & 600) This Standard Practice covers Classes 150, 300 and 600 corrosion resistant... | |
| Corrosion Resistant Pipe Fittings Threaded and Socket Welding Class 150 and 1000 (ANSI-approved American National Standard) This Standard Practice for corrosion resistant pipe fittings threaded and socket welding, Class 150... | |
| Diaphragm Valves This Standard Practice applies to valves for gen-eral liquid and gas service that effect valve closure by means of a resilient diaphragm sealing against a weir or a... | |
| Ductile Iron Gate Valves This Standard Practice provides requirements for ductile iron gate valves with flanged, threaded, mechanical joint, and push-on end connections. These valves are suitable within the sizes... | |
| Ductile Iron Swing Check Valves This Standard Practice establishes requirements for ductile iron swing check valves with flanged, threaded, mechanical-joint, and push-on ends for general purpose. This Standard Practice covers... | |
| Excess Flow Valves for Fuel Gas Service, NPS 1½ through 12 PURPOSE To provide a Standard Practice for Excess Flow Valves, NPS 1½ through 12, designed for use in fuel... | |
| Excess Flow Valves for Low Pressure Fuel Gas Appliances The purpose is to provide a Standard Practice for Excess Flow Valves installed in low pressure fuel gas piping systems which... | |
| Fabricated Tapping Sleeves To provide information for standardization of fabricated tapping sleeves, typically used with tapping valves to make connections to existing mains without interruption of service. SCOPE This Standard... | |
| Factory-Made Butt-Welding Fittings for Class I Nuclear Piping Applications NOTICE: MSS SP-87-1991 (R 1996) was reinstated in 2011 for the purpose of making an active version available to those utilizing... | |
| Factory-Made Wrought Belled End Pipe Fittings for Socket-Welding GENERAL-This Standard Practice covers the design and manufacturing requirements for factory-made wrought belled end pipe fittings for socket-welding formed from either tubular... | |
| Flexible Graphite Packing System for Rising Stem Valves - Design Requirements This Standard Practice establishes material and dimensional requirements for valve packing, packing chamber, packing gland, packing washer, bonnet, and... | |
| Gray Iron and Ductile Iron In-Line, Spring-Loaded, Center-Guided Check Valves This Standard Practice covers in-line, internally spring-loaded, center-guided check valves made of gray iron or ductile iron. These valves, having... | |
| Gray Iron Gate Valves, Flanged and Threaded Ends This Standard Practice covers gray iron gate valves with flanged or threaded ends. This Standard Practice covers valves in sizes and pressure-temperature... | |
| Gray Iron Globe & Angle Valves, Flanged and Threaded Ends This Standard Practice covers gray iron globe and angle valves with flanged and threaded ends. These valves are suitable within... | |
| Gray Iron Plug Valves, Flanged and Threaded Ends This Standard Practice covers gray iron plug valves with flanged or threaded ends. This Standard Practice covers valves in sizes and pressure-temperature... | |
| Gray Iron Swing Check Valves, Flanged and Threaded Ends This Standard Practice covers gray iron swing check valves with flanged and threaded ends for general purpose service. The use of... | |
| Gray-Iron and Ductile-Iron Tapping Sleeves To provide information for standardization of tapping sleeves used to make connections to existing mains. SCOPE This Standard Practice covers the performance and design requirements... | |
| Guidelines for Manual Operation of Valves The handwheels or handles provided with manually actuated valves are designed so that reasonable effort exerted by the operator(s) is sufficient to actuate. However,... | |
| Guidelines for Metric Data in Standards for Valves, Flanges, Fittings, and Actuators This Standard Practice provides recommended rules and guidelines to be followed by MSS Technical Committees while developing or... | |
| Guidelines on Terminology for Valves and Fittings This Standard Practice lists and defines principle terms and acronyms widely used to describe general purpose valves, fittings, and related components. It is... | |
| 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... | |
| High Pressure Chemical Industry Flanges and Threaded Stubs for Use with Lens Gaskets Flanges specified in the Standard Practice should be used only with the lens gaskets specified herein. This... | |
| 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... | |
| Instrument Valves for Code Applications This Standard Practice applies to small valves and manifold valves developed for and predominately used in instrument, control, and sampling piping systems. It covers steel... | |
| Instrument Valves This Standard Practice applies to small valves and manifold valves developed for and predominantly used in instrument, control and sampling piping systems. It covers steel and alloy valves... | |
| Integrally Reinforced Forged Branch Outlet Fittings - Socket Welding, Threaded, and Buttwelding Ends This Standard Practice covers essential dimensions, finish, tolerances, testing, marking, material, and minimum strength requirements for 90... | |
| Live-Loaded Valve Stem Packing Systems Forward: This Standard Practice was developed by a cooperative effort of representatives of valve and packing manufacturers. This Standard Practice is intended primarily to be... | |
| Metallic Manually Operated Gas Distribution Valves The purpose is to provide a Standard Practice for metallic valves used in fuel gas piping systems which are manually operated both above and... | |
| MSS Valve User Guide This Guide presents information which should be helpful to users desiring to avoid the most obvious causes of problems with valves. The material is divided into... | |
| Multi-Turn and Check Valve Modifications This Standard Practice establishes minimum requirements for the modification of new gate, globe, and check valves, which have been manufactured in accordance with recognized national... | |
| Multi-Turn Valve Actuator Attachment - Flange and Driving Component Dimensions and Performance Characteristics This standard practice is intended to provide a basis for the standardization of multi-turn actuator mounting dimensions... | |
| Non-Ferrous Threaded and Solder-Joint Unions for Use With Copper Water Tube This standard practice covers 1/4" – 4" straight size threaded and solder end copper and copper alloy, metal to... | |
| Part-Turn Valve Actuator Attachment - Flange and Driving Component Dimensions and Performance Characteristics This standard practice is intended to provide a basis for the standardization of part-turn actuator mounting dimensions... | |
| Pipe Hangers and Supports – Selection and Application This Standard Practice was developed by a cooperative effort of representatives of the pipe hanger manufacturers. It is based on the best... | |
| Pipe Hangers and Supports - Materials, Design, Manufacture, Selection, Application, and Installation (ANSI-approved American National Standard) This Standard Practice establishes the material, design, fabrication, and inspection criteria to be used... | |
| Plastic Industrial Ball Valves This Standard Practice establishes requirements for plastic industrial ball valves in nominal pipe sizes (NPS) 1/2 through 4, designed for general industrial systems for the distribution... | |
| Pressure Testing of Valves This Standard Practice for Pressure Testing of Valves was originally adopted in 1961. It was developed for the purpose of providing a uniform means of testing... | |
| Protective Coatings for the Interior of Valves, Hydrants, and Fittings This Standard Practice covers the material, application, and performance requirements for liquid or powder interior coatings for valves, hydrants, and... | |
| Qualification Requirements for Elastomer Diaphragms for Nuclear Service Diaphragm Type Valves This Standard Practice delineates a method for qualification of elastomer diaphragms, in accordance with methodology and documentation as described... | |
| Qualification Testing Methods for Stem Packing for Rising Stem Steel Valves This Standard Practice provides procedures and guidelines for testing and evaluation of valve stem packing materials and material combinations. | |
| 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... | |
| Quality Standard for Ferritic and Martensitic Steel Castings for Valves, Flanges, Fittings, and Other Piping Components - Ultrasonic Examination Method This Standard Practice provides methods and acceptance standards for ultrasonic... | |
| Quality Standard for Positive Material Identification of Metal Valves, Flanges, Fittings, and Other Piping Components This Standard Practice provides methods and acceptance standards for Positive Material Identification (PMI) of metal... | |
| Quality Standard for Steel Castings and Forgings for Valves, Flanges and Fittings and Other Piping Components - Magnetic Particle Exam Method The methods of Section 3.0 provide uniform procedures which... | |
| Quality Standard for Steel Castings and Forgings for Valves, Flanges, Fittings, and Other Piping Components Liquid Penetrant Examination Method This MSS Standard Practice, SP-93, was originally adopted in 1982 for... | |
| Quality Standard for Steel Castings for Valves, Flanges, and Fittings and Other Piping Components - Radiographic Examination Method The methods of Section 4 provide uniform procedures which will produce satisfactory... | |
| Quality Standard for Steel Castings for Valves, Flanges, Fittings, and Other Piping Components - Visual Method for Evaluation of Surface Irregularities (ANSI-approved American National Standard) This Standard Practice is intended... | |
| Quality Standard Practice for Oxygen Cleaning of Valves & Fittings This Standard Practice outlines the general requirements for cleaning, inspection, testing, and packaging of valves and fittings intended to be... | |
| Quality Standard Practice for Preparation of Valves and Fittings for Silicone-Free Service This Standard Practice establishes general requirements for valves and fittings for use in silicone-free service requiring an increased... | |
| Resilient-Seated Cast Iron Eccentric Plug Valves This Standard Practice covers 1/4 turn eccentric cast iron plug valves having flanged, threaded, mechanical joint, or grooved end connection. This standard is intended... | |
| Service-Line Valves and Fittings for Drinking Water Systems This standard covers valves and fittings in sizes 1/2" through 2" NPS for use in drinking water system service-line between the main... | |
| Service-Line Valves and Fittings for Drinking Water Systems This Standard Practice covers valves and fittings in sizes NPS ½ through 2, for use in drinking water system service-lines between the... | |
| Socket Welding Reducer Inserts PURPOSE To provide a Standard Practice establishing requirements for insert type fittings, which effectively, after welded installation, creates a socket welded reduced end fitting, such as... | |
| Specification for High-Test, Wrought, Butt-Welding Fittings This specification covers factory-made, seamless and electric welded carbon and low alloy steel, butt-welding fittings for use in high pressure gas and oil transmission... | |
| Spot Facing for Bronze, Iron and Steel Flanges This MSS Standard Practice applies to the spot facing for U.S. customary (inch series) bolting of pipe flanges in bronze, gray iron,... | |
| 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... | |
| Standard Finishes for Contact Faces of Pipe Flanges and Connecting-End Flanges of Valves and Fittings This Standard Practice pertains to the finish of gasket contact faces of pipe flanges and... | |
| Standard Marking Systems for Valves, Fittings, Flanges and Unions This marking system applies to valves, fittings, flanges, and unions used in piping connections which include (but are not limited to)... | |
| Steel In-Line Spring-Assisted Center Guided Check Valves This Standard Practice covers in-line, center guided, internally spring-assisted type check valves made of steel, or other alloys listed in Table 1 of... | |
| Steel Pipeline Flanges This Standard Practice covers pressure-temperature ratings, materials, dimensions, tolerances, marking, and testing. The welding neck type flanges shall be forged steel, and the blind flanges may be... | |
| Swage(d) Nipples and Bull Plugs This document establishes a Standard Practice for Swaged Nipples and Bull Plugs produced for a number of years by various manufacturers to varying dimensions although... | |
| Valves for Cryogenic Service Including Requirements for Body/Bonnet Extensions This Standard Practice covers requirements for material, design, dimensions, fabrication, non-destructive examination and pressure testing of stainless steel and other alloy... | |
| Welded 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-temperatu re... | |
| Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications This Standard Practice provides dimensions, tolerances, and markings for butt-welding fittings for low pressure, corrosion resistant applications. This Standard... | |
| Wrought Copper Solder-Joint Pressure Fittings This Standard Practice covers nominal size 1/8 through 8 straight and reducing size wrought copper solder joint seamless fittings, designed for use with copper water... |