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Membership Benefits

As a member of MSS, your organization receives the following benefits:

  • Gain Internal Company Access to all our Standards
  • Connect and Collaborate with Valve and Fittings Industry Professionals
  • Complimentary Registration to the MSS Annual Meeting
  • CEU/PDH Credit for “PE” and Other Professional Certifications
  • Participate in the Development of New or Existing Technical Standards
  • Complementary subscription to a new innovative platform
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Latest Projects and Publications

  • SP-120-2024, Flexible Graphite Packing Sealing for Rising Stem Valves
  • SP-93-2024, Quality Standard for Steel Castings and Forgings for Valves, Flanges, Fittings, and Other Piping Components – Liquid Penetrant Examination Method
  • SP-159-2024, Manual Actuators for Hand-Operation or Automated Input
  • SP-154-2023, Low Pressure Knife Gate Valves for Double Block and Bleed
  • SP-148-2023, Low Pressure Flanged or Lugged Carbon Steel and Iron or Ductile Iron, Cast or Fabricated, Bonnetless, Knife Gate Valves without Liners
  • SP-105-2023, Instrument Valves for Code Applications
  • SP-149-2023, Preformed Elastomeric and Polytetrafluoroethylene (PTFE) V-Ring Packing Sets for Waterworks Valves
  • SP-99-2023, Instrument Valves
  • SP-138-2023, Quality Standard Practice for Oxygen Cleaning of Valves and Fittings
  • SP-130-2022, Bellows Seals for Instrument Valves
  • SP-117-2022, Bellows Seals for Globe and Gate Valves
  • SP-109-2022, Weld-Fabricated, Copper Solder-Joint Pressure Fittings
  • SP-104-2022, Wrought Copper, Solder-Joint Pressure Fittings
  • Project:20-19-ANS, SP-55, Quality Standard for Steel Castings for Valves, Flanges, Fittings, and Other Piping Components - Visual Method for Evaluation of Surface Irregularities. Opened: October 2020
    • Project: PN-22-15, New SP-Design Guidelines for Gasketed Valve Joints. Opened: October 2022
    • Project: PN-22-14, New SP-Valves for Hydrogen Fluoride (HF) Alkylation Service. Opened: October 2022
    • Project: PN-21-18, New SP-Pre-Insulated Pipe Hangers, Pre-Insulated Pipe Supports, and Thermal Shields - Materials, Design, Testing, Manufacture, Selection, Application, and Installation. Opened: June 2021
    • Project: PN-20-03, New SP-Examination Methodology and Acceptance Criteria for Graphitic-Based Packing and Gaskets for Valves. Opened: May 2020
    • Project: PN-20-01, New SP-Packing and Gaskets for Oxygen Service. Opened: December 2019
    • Project:PN-19-08, New SP-Ductile Iron Flanges for CWP Service. Opened: May 2019
    • Project: PN-20-02, New SP-Design Requirements for Actuator-to-Valve Mounting Components. Opened: October 2018
    • Project: PN-16-20, New SP-Guidelines for Classifying the Severity of Valve Service Conditions. Opened: May 2016
    • Project: PN-16-09, New SP-Large Diameter Slip-On and Lap-Joint Flanges. Opened April 2016
    • Project: PN-11-23, New SP-Protection of Valves, Fittings, and Actuators from Damage During Surface Preparation and Application of Coatings. Opened: May 2011
    • Project: PN-10-05, New SP-Cable Suspension of Pipe - Materials, Selection, Application, and Installation. Opened: February 2010
    • Project: PN-09-16, New SP-Modification of Quarter Turn Valves. Opened: February 2009
    • Project: PN-09-18, New SP-Installation of Gear & Power Actuators. Opened: February 2009
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    Member Companies

    Manufacturers Standardization Society
    of the Valve and Fittings Industry, Inc.