Manufacturers Standardization Society

06/08/2026

We are pleased to announce the election of Paul Heald, Vice President of Product Engineering, at Bonney Forge as President of the Board of Directors for Manufacturers Standardization Society (MSS).

A valued leader within both our organization and the industry, Paul brings extensive experience, insight, and dedication to this role. We look forward to working together under his leadership as we continue to advance our mission and serve our members.

Please join us in congratulating Paul on this well-deserved honor.

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06/04/2026

ANSI 45-day Public Review

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05/28/2026

The Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry announces the publication of an Errata Sheet for SP-166-2026, Testing of Valves for Cryogenic Hydrogen Service.

The Errata Sheet includes a “normative” correction to Table 3. The Errata Sheet is meant for insertion into the current 2026 Edition. Future editions of this Standard Practice will include this corrected information.

SP-166 continues to be maintained under the consensus of MSS Technical Committee 410, Severe & Special Service Valves.

The Errata Sheet inserted into MSS SP-166-2026 is now available from authorized U.S. and global distributors. It has been published in an electronic version (PDF) and can be downloaded (free of charge) at: https://msshq.org/page/AmendmentsErrataNotices.

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05/26/2026

MSS is creating an ANSI Consensus Committee

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05/19/2026

The Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry announces that MSS SP-166-2026, Testing of Valves for Cryogenic Hydrogen Service has been published by MSS.

This Standard Practice focuses on testing valves for pressure boundary integrity as well as leakage through the valve closure components. It includes qualification testing requirements, to ensure sound basic design and function of a valve type, as well as production testing to validate that valves put into service meet the requirements of the underlying design type. Also included in this Standard Practice is the production testing of the valve vacuum jacket, to validate its reliability in service.

This first edition of the Standard Practice seeks to address the most important testing demands for cryogenic hydrogen valves. This is a broad field, and it will continue to evolve. Future revisions of this Standard Practice will evolve as well to address the demands of these applications as they arise.

SP-166 continues to be maintained under the consensus of MSS Technical Committee 410, Severe and Special Service Valves.

The Standard Practice, MSS SP-166-2026 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- 78 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.

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05/15/2026

The Manufacturers Standardization Society (MSS) of the Valve and Fittings Industry announces that MSS SP-78-2026, Gray Iron Plug Valves, Flanged and Threaded Ends has been revised and published by MSS.

This Standard Practice covers:
a) Gray iron plug valves with flanged or threaded ends.

b) Valves in sizes and pressure-temperature ratings specified herein for general purpose service.

c) Includes directly or by reference, stipulations on chemical and mechanical properties of materials and on dimensions of end connections in common use.

SP-78 continues to be maintained under the consensus of MSS Technical Committee 106, Cast Iron Valves. The Standard Practice, MSS SP-78-2026 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- 78 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.

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04/30/2026