MSS The Technical Voice of the Industry

Admendments, Errata, and Notices Recent Publications
News/Press Releases

* MSS-SP-58-2018 Issued 10-17-2019
* MSS-SP-9-2018 Issued 5-22-2019
* MSS-SP-119-2003-2010 Issued 11-21-2018
* MSS-SP-67-2017 Issued 9-21-2018
* MSS SP-44-2016 Issued 1-23-2018
* MSS SP-121-2006 Withdraw Notice Issued 12-14-2017
* MSS SP-67-2017 Issued 11-2017
* MSS SP-136-2014 Issued 9-2017
* MSS SP-44-2016 Issued 9-06-2017
* MSS SP-111-2015 Issued 4-27-2017
* MSS-SP-124-2016 Issued 4-27-2017
* MSS SP-133-2010 Withdraw Notice Issued 5-1-2016
* MSS-SP-43-2013 Issued 9-1-2015
* MSS SP-69-2003 Withdraw Notice Issued 6-6-2014
* MSS-SP-119-2010 Issued 6-4-2014
* MSS SP-71-2011 Issued 2-22-2013
* MSS-SP-80-2008 Issued 12-3-2012
* MSS-SP-109-2012(and 1997 R2006) Issued 7-9-2012
* MSS-SP-72-2010 Replacement (2010a) Issued 4-18-2012
* MSS-SP-86-2009 Issued 7-6-2011
* MSS-SP-44-2006-2010 Issued 5-20-2011
* MSS-SP-79-2009 Issued 9-9-2010 (Amnd. 8-7-2012)
* MSS SP-110-2010 Issued 8-23-2010
* MSS SP-43-2008 Issued 2-25-2010

Amendments, Errata, and Notices are issued after the revision release of the Standard Practice. Please download the document if you have purchased any of the above Standard Practices prior to or on the above issue date. The documents above have been formatted to show their relevant location within the respective Standard Practice.


















Who is MSS?

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, Pipe Fittings, Valve Modification, Flanges, Pipe Hangers, and Associated Supports. MSS valve and fitting standards are in use around the world in a wide variety of facilities, including Nuclear Power Plants, and in virtually every industry, from Waste Water to Oil Refining. MSS currently includes 111 member companies that work in 26 technical committees to develop and maintain standards that shape the way flow is controlled. MSS is an American National Standards Institute (ANSI)-accredited standards developer.

Creating Standards for:

  • Valves
  • Pipe Fittings
  • Flanges
  • Valve Actuators
  • Pipe Hangers
  • Associated Seals
  • Valve Modification
  • Pipe Supports

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    May 17, 2021

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