Manufacturers Standardization Society (MSS)

MSS About - Officially founded in 1924, the Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry is a non-profit technical association organized for development and improvement of industry, national and international codes and standards for: Valves, Valve Actuators, Valve Modification, Pipe Fittings, Pipe Hangers, Pipe Supports, Flanges and Associated Seals

Standards

• MSS SP-6 - Standard Finishes for Contact Faces of Pipe Flanges and Connecting & End Flanges of Valves and Fittings
• MSS SP-9 - Spot Facing for Bronze, Iron and Steel Flanges
• MSS SP-25 - Standard Marking System for Valves, Fittings, Flanges and Unions
• MSS SP-42 - Class 150 Corrosion Resistant Gate, Globe, angle and Check Valves with Flanged and Butt Weld Ends
• MSS SP-43 - Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications
• MSS SP-44 - Steel Pipeline Flanges
• MSS SP-45 - Bypass and Drain Connections
• MSS SP-51 - Class 150LW Corrosion Resistant Cast Flanges and Flanged Fittings
• MSS SP-53 - Quality Standard for Steel Castings and Forgings for Valves, Flanges and Fittings and Other Piping Components - Magnetic Particle Exam Method
• MSS SP-54 - Quality Standard for Steel Castings for Valves, Flanges and Fittings and Other Piping Components - Radiographic Examination Method
• MSS SP-55 - Quality Standard for Steel Castings for Valves, Flanges and Fittings and Other Piping Components - Visual Method for Evaluation of Surface Irregularities
• MSS SP-58 - Pipe Hangers and Supports - Materials, Design, Manufacture, Selection, Application, and Installation
• MSS SP-60 - Connecting Flange Joint Between Tapping Sleeves and Tapping Valves
• MSS SP-61 - Pressure Testing of Valves
• MSS SP-65 - High Pressure Chemical Industry Flanges and threaded Stubs for Use with Lens Gaskets
• MSS SP-67 - Butterfly Valves
• MSS SP-68 - High Pressure Butterfly Valves with Offset Design
• MSS SP-69 - Pipe Hangers and Supports ‚Äì Selection and Application
• MSS SP-70 - Cast Iron Gate Valves, Flanged and Threaded Ends
• MSS SP-71 - Cast Iron Swing Check Valves, Flanged and Threaded Ends
• MSS SP-72 - Ball valves with Flanged or Butt-Welding ends for General Service
• MSS SP-73 - Brazing Joints for Copper and Copper Alloy Pressure Fittings
• MSS SP-75 - Specification for High Test Wrought Butt Welding Fittings
• MSS SP-77 - Guidelines for Pipe Support Contractual Relationships
• MSS SP-78 - Cast Iron Plug Valves
• MSS SP-79 - Socket Welding Reducer Inserts
• MSS SP-80 - Bronze Gate, Globe Angle and Check Valves
• MSS SP-81 - Stainless Steel, Bonnetless, Flanged Knife Gate Valves
• MSS SP-82 - Valve Pressure Testing Methods (withdrawn, replaced by MSS SP-01)
• MSS SP-83 - Class 300 Steel Pipe Unions, Socket Welding and Threaded
• MSS SP-85 - Cast Iron Globe and Angle Valves, Flanged and Threaded Ends
• MSS SP-86 - Guidelines for Metric Data in Standards for Valves, Flanges, Fittings and Actuators
• MSS SP-88 - Diaphragm Valves
• MSS SP-89 - Pipe Hangers and Supports -Fabrication and Installation Practices
• MSS SP-90 - Guidelines on Terminology for Pipe Hangers and Supports
• MSS SP-91 - Guidelines for Manual Operation of Valves
• MSS SP-92 - MSS Valve User Guide
• MSS SP-93 - Quality Standard for Steel Castings and Forgings for Valves, Flanges, and Fittings and Other Piping Components - Liquid Penetrant Exam Method
• MSS SP-94 - Quality Standard for Ferritic and Martensitic Steel Castings for Valves, Flanges, Fittings, and Other Piping Components - Ultrasonic Examination Method
• MSS SP-95 - Swage(d) Nipples and Bull Plugs
• MSS SP-96 - Guidelines on Terminology for Valves and Fittings
• MSS SP-97 - Integrally Reinforced Forged Branch Outlet Fittings - Socket Welding, Threaded and Buttwelding Ends
• MSS SP-98 - Protective Coatings for the Interior of Valves, Hydrants, and Fittings
• MSS SP-99 - Instrument Valves
• MSS SP-100 - Qualification Requirements for Elastomer Diaphragms for Nuclear Service Diaphragm Type Valves
• MSS SP-101 - Part-Turn Valve Actuator Attachment - Flange and Driving Component Dimensions and Performance Characteristics
• MSS SP-102 - Multi-Turn Valve Actuator Attachment - Flange and Driving Component Dimensions and Performance Characteristics
• MSS SP-104 - Wrought Copper Solder Joint Pressure Fittings
• MSS SP-105 - Instrument Valves for Code Applications
• MSS SP-106 - Cast Copper Alloy Flanges and Flanged Fittings, Class 125, 150 and 300
• MSS SP-108 - Resilient-Seated Cast Iron-Eccentric Plug Valves
• MSS SP-109 - Welded Fabricated Copper Solder Joint Pressure Fittings
• MSS SP-110 - Ball Valves Threaded, Socket-Welding, Solder Joint, Grooved and Flared Ends
• MSS SP-111 - Gray-Iron and Ductile-Iron Tapping Sleeves
• MSS SP-112 - 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.
• MSS SP-113 - Connecting Joint between Tapping Machines and Tapping Valves
• MSS SP-114 - Corrosion Resistant Pipe Fittings Threaded and Socket Welding, Class 150 and 1000
• MSS SP-115 - Excess Flow Valves, 1 1/4 NPS and Smaller, for Natural Gas Service
• MSS SP-116 - Service Line Valves and Fittings for Drinking Water Systems
• MSS SP-117 - Bellows Seals for Globe and Gate Valves
• MSS SP-118 - Compact Steel Globe & Check Valves - Flanged, Flangeless, Threaded & Welding Ends (Chemical & Petroleum Refinery Service)
• MSS SP-119 - Factory-Made Wrought Belled End Socket-Welding Fittings
• MSS SP-120 - Flexible Graphite Packing System for Rising Stem Steel Valves - Design Requirements
• MSS SP-121 - Qualification Testing Methods for Stem Packing for Rising Stem Steel Valves
• MSS SP-122- Plastic Industrial Ball Valves
• MSS SP-123 - Non-Ferrous Threaded and Solder-Joint Unions for Use With Copper Water Tube
• MSS SP-124 - Fabricated Tapping Sleeves
• MSS SP-125 - Gray Iron and Ductile Iron In-Line, Spring-Loaded, Center-Guided Check Valves
• MSS SP-126 - Steel In-Line Spring-Assisted Center Guided Check Valves
• MSS SP-127 - Bracing for Piping Systems Seismic-Wind-Dynamic Design, Selection, Application
• MSS SP-128 - Ductile Iron Gate Valves
• MSS SP-129 - Copper-Nickel Socket-Welding Fittings and Unions
• MSS SP-130 - Bellows Seals for Instrument Valves
• MSS SP-131 - Metallic Manually Operated Gas Distribution Valves
• MSS SP-132 - Compression Packing Systems for Instrument Valves
• MSS SP-133 - Excess Flow Valves for Low Pressure Fuel Gas Appliances
• MSS SP-134 - Valves for Cryogenic Service Including Requirements for Body/Bonnet Extensions
• MSS SP-135 - High Pressure Steel Knife Gate Valves
• MSS SP-136 - Ductile Iron Swing Check Valves
• MSS SP-137 - Quality Standard for Positive Material Identification of Metal Valves, Flanges, Fittings, and Other Piping Components
• MSS SP-138 - Quality Standard Practice for Oxygen Cleaning of Valves & Fittings
• MSS SP-139 - Copper Alloy Gate, Globe, Angle, and Check Valves for Low Pressure/Low Temperature Plumbing Applications