Manufacturers Standardization Society

Manufacturers Standardization Society MSS has developed codes and standards for the worldwide valve and fittings industry since 1924.

The primary function of MSS is to provide its members the means to develop engineering standard practices for the use and benefit of the valve and fittings industry and users of its products. The Society, the only organization dedicated solely to the technical needs of the industry, is currently comprised of 26 technical committees to write, revise and reaffirm industry standards.

The Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry announces that MSS SP-45 2026 has bee...
08/21/2026

The Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry announces that MSS SP-45 2026 has been revised and published.

To learn more about SP-45 2026 and other MSS standards and to place an order, start here: https://msshq.org/ActiveStandards. MSS members receive free online access and 50% off downloadable or print editions.

Website: https://msshq.org
Follow us on Facebook: https://www.facebook.com/profile and
LinkedIn: https://www.linkedin.com/company/manufacturers-standardization-society

The Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry announces that MSS SP-6 2026 has been...
08/19/2026

The Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry announces that MSS SP-6 2026 has been revised and published.

To learn more about SP-6 2026 and other MSS standards and to place an order, start here: https://msshq.org/ActiveStandards. MSS members receive free online access and 50% off downloadable or print editions.

Website: https://msshq.org
Follow us on Facebook: https://www.facebook.com/profile and
LinkedIn: https://www.linkedin.com/company/manufacturers-standardization-society

Have you kept up with all the Standard Practices (SPs) published since January 2026 by the Manufacturers Standardization...
08/13/2026

Have you kept up with all the Standard Practices (SPs) published since January 2026 by the Manufacturers Standardization Society?

Here's a recap of revised standards recently published:

SP-156-2026, Ductile Iron, Metal-Seated, Non-Lubricated, Eccentric Plug Valves

SP-42-2026, Corrosion-Resistant Gate, Globe, Angle, and Check Valves with Flanged and Butt Weld Ends (Classes 150, 300, & 600)

SP-78-2026, Gray Iron Plug Valves, Flanged and Threaded Ends

SP-166-2026, Testing of Valves for Cryogenic Hydrogen Service (Errata May 2026)

SP-123-2026, Non-Ferrous Threaded and Solder-Joint Unions for Use with Copper Water Tube

SP-43-2026, Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications

ANSI SP-44-2026, Steel Pipeline Flanges

SP-160-2024, Valves for Hydrogen Fluoride (HF) Alkylation Service January 2026 Errata (Correction)

To learn more about these standards—and many others—go to the Active Standards page.

https://msshq.org/ActiveStandards.
MSS members receive free online access and 50% off downloadable or print editions.

Website: https://msshq.org
Follow us on Facebook: https://www.facebook.com/profile and
LinkedIn: https://www.linkedin.com/company/manufacturers-standardization-society

MSS is pleased to share that Carlos Davila's term on the board has been extended. As the Product Manager at Crane ChemPh...
08/12/2026

MSS is pleased to share that Carlos Davila's term on the board has been extended. As the Product Manager at Crane ChemPharma & Energy, Carlos has made significant contributions as MSS Chair of the Technical Committees on Quality Standards, Diaphragm Valves, and Steel Flanges. We look forward to his continued leadership and expertise.

Website: https://msshq.org
Follow us on Facebook: https://www.facebook.com/profile and
LinkedIn: https://www.linkedin.com/company/manufacturers-standardization-society

08/03/2026
We are excited to announce that Audrey Rivero is joining the MSS family! 🎉 With her extensive editing experience, we bel...
07/30/2026

We are excited to announce that Audrey Rivero is joining the MSS family! 🎉 With her extensive editing experience, we believe she will play a crucial role as our new in-house Standards Editor. We look forward to the positive contributions and insights she will bring to our team!

The Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry announces that MSS SP-156-2026, Ducti...
07/27/2026

The Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry announces that MSS SP-156-2026, Ductile Iron, Metal-Seated, Non-Lubricated, Eccentric Plug Valves has been revised and published by MSS.

SP-156 continues to be maintained under the consensus of MSS Technical Committee 106, Cast Iron Valves. The Standard Practice, MSS SP-156-2026 is now available from authorized U.S. and global distributors. It has been published in an electronic version (PDF) and in book format.

To learn more about SP-156 2026 and other MSS standards, and to place an order, start here: https://msshq.org/ActiveStandards. MSS members receive free online access and 50% off downloadable or print editions.

Website: https://msshq.org
Follow us on Facebook: https://www.facebook.com/profile and
LinkedIn: https://www.linkedin.com/company/manufacturers-standardization-society

The Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry announces that MSS SP-42-2026, Corros...
07/22/2026

The Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry announces that MSS SP-42-2026, Corrosion-Resistant Gate, Globe, Angle, and Check Valves with Flanged and Butt Weld Ends (Classes 150, 300, and 600), has been revised and published by MSS.

SP-42 continues to be maintained under the consensus of MSS Technical Committee 114, Steel Valves. The Standard Practice, MSS SP-42-2026, is now available from authorized U.S. and global distributors. It has been published in an electronic version (PDF) and in book format.

To learn more about SP-42 2026 and other MSS standards, and to place an order, start here: https://msshq.org/ActiveStandards. MSS members receive free online access and 50% off downloadable or print editions.

Website: https://msshq.org
Follow us on Facebook: https://www.facebook.com/profile and
LinkedIn: https://www.linkedin.com/company/manufacturers-standardization-society

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