News / Press Recent Publications Projects
News/Press Releases

* MSS Publishes New Standard for Evaluating Casting Quality and for Knife Gate Valves (Mar 2014)
* MSS Publishes Revised Standard Marking System and Receives ANSI Approval (Jan 2014)
* MSS Publishes Revised Standard for Bracing of Piping Systems (Mar 2014)
* MSS Scholarship Press Release January 2014
* MSS Awards Scholarship to Mechanical Engineering Undergrad (August 2011)
* MSS Scholarship Press Release June 2011
* ANSI-MSS SP-114-2007 Press Release
* Publication Announcement October 2010
* MSS Publishes New SP-139 Valve Standard for Low Lead Conditions_August 2010
* Debut of Redesigned MSS Web Site_July 2010
* Publication Announcement April 2010
* New MSS President
* New MSS SP for PipeHangers
* MSS Publishes 11 Revised Standards (December 2011)
* MSS Publishes Three New Standards (December 2011)
* MSS Publishes Six Revised and One New Standard (March 2012)
* MSS Publishes Eleven Revised Standards (May 2012)
* MSS Elects New Officials (July 2012)
* MSS Mourns the Passing of its President, Thomas J. Hannafin (August 2012)
* MSS Publishes Revised Quality Standard for Magnetic Particle Examination (Dec 2012)
* MSS Publishes New Standard for Pressure Seal Bonnet Valves (Feb 2013)
* MSS Publishes Five Revised Standards (March 2013)
* MSS Publishes Six Revised and One New Standard (June 2013)


SP-9-2013

SP-25-2013

SP-42-2013

SP-43-2013

SP-54-2013

SP-61-2013

SP-80-2013

SP-81-2013

SP-123-2013

SP-126-2013

SP-127-2014a

SP-130-2013

SP-137-2013

SP-142-2012

SP-143-2012

SP-144-2013

SP-145-2013

SP-146-2014

SP-147-2014


ANSI/MSS STANDARDS PROCESS:
ANSI/MSS SP-69-2003 has been Withdrawn as an active SP. ANSI/MSS SP-58 can be referenced in place of this standard; SP-69 will remain available as a "historical" document" (June 2014).
PN-11-01-ANS (C-304)
, ANSI Consensus Committee for approval of MSS SP-138-201x as an American National Standard
(ANSI public review is complete; Consensus Committee review and Ballot in process
PN-13-01-ANS (C-110), ANSI Consensus Committee for approval of MSS SP-44-2010 as an American National Standard
(ANSI public review complete; Prep for ANSI Consensus Committee review in progress--accepting nominations for Consensus Committee)
PN-13-02-ANS (C-108)
, ANSI Consensus Committee for approval of ANSI/MSS SP-114-201x as a revised American National Standard
(Currently being revised; Prep for Consensus Committee review and Ballot--accepting nominations for Consensus Committee)
PN-13-03-ANS (C-403)
, ANSI Consensus Committee for approval of ANSI/MSS SP-58-201x as a revised American National Standard
(Currently being revised in MSS committee; accepting nominations for Consensus Committee)
PN-13-22-ANS (C-114)
, ANSI Consensus Committee for approval of MSS SP-134-2012 as an American National Standard
(ANSI PINS Review complete; Currently in prep for BSR-8 Public Review; accepting nominations for Consensus Committee)
PN-13-23-ANS (C-114)
, ANSI Consensus Committee for approval of MSS SP-144-2013 as an American National Standard
(ANSI PINS Review complete; Currently in prep for BSR-8 Public Review; accepting nominations for Consensus Committee)
PN-14-02-ANS (C-302)
, ANSI Consensus Committee for approval of MSS SP-96-2011 as an American National Standard
(ANSI public review set to begin; Prep for ANSI Consensus Committee review in progress--accepting nominations for Consensus Committee)

MSS STANDARD PRACTICE PROJECTS:
PN-08-10 (C-401), Metal Ball Valves for Low Pressure/Low Temperature Plumbing Applications
PN-08-11 (C-304), Quality Standard for Steel Castings Used in Standard Class Steel Valves ? Sampling Method for Evaluating Casting Quality
PN-09-16 (C-310), Modification of Quarter Turn Valves
PN-09-17 (C-310), Modification of AWWA Valves
PN-09-18 (C-310), Installation of Gear & Power Actuators
PN-09-19 (C-114), High Pressure Iron and Ductile Iron Knife Gate Valves
PN-09-20 (C-308), Preformed Elastomeric V-Ring Packing Sets for Valves
PN-10-04 (C-113), Wrought and Fabricated Press-Connection Fittings for Low Pressure, Corrosion Resistant Applications
PN-10-05 (C-403), Wire Rope Pipe Hangers
PN-11-23 (C-304), Protection of Valves, Fittings, and Actuators from Damage during Surface Preparation and Application of Coatings
Pending PN (C-201), Cast Copper Alloy Flanges and Flanged Fittings for Use in Potable Water Applications
Pending PN (C-201), Soft-Seated Copper Alloy Unions
Pending PN (C-114), Involves low pressure, Classes 125/300 rated knife gate valves with body materials of gray iron & ductile iron

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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 85 member companies that work in 25 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.

ANSI Accreditation
As part of the American National Standards process, ANSI accredits the due process-based procedures of MSS, in addition, ANSI accreditation signifies that the procedures used by MSS meet the Institute's requirements for consensus, openness, balance, and due process.

Creating Standards for:

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


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