MSS - Manufacturers Standardization Society of the Valve and Fittings Industry.
Scope
This Standard Practice covers nominal size 1/8 through 8 straight and reducing size wrought copper solder joint seamless fittings@ designed for use with copper water tube@ ASTM B 88@ at pressures and temperatures shown in Table A 1. The fittings in this Standard Practice have dimensions and ratings not covered in ASME B16.22. Included in this Standard Practice are: a) Pressure-temperature ratings; b) Abbreviations for end connections; c) Size and method of designating openings and fittings; d) Marking; e) Materials; f) Dimensions and tolerances; g) Tests.