Manufacturers Standardization Society of the Valve and Fitting Industry
From Engineering Wiki
MSS Standards
Manufacturers Standardization Society of the Valve and Fitting Industry (MSS). MSS is a resource for standards regarding flanges, pipe fittings, pipe hangers, valves, valve actuators, valve modification, and associated seals. The Ohio University Library does not collect MSS Standards but you can look at their web-page to see what standards they have available. Here is a specific example of acquiring a Standard that the library does not own.
