MSS - Manufacturers Standardization Society of the Valve and Fittings Industry.

MSS SP-110

Fri, 01 Jan 2010 00:00:00 GMT

MSS SP-110; Ball Valves Threaded, Socket-Welding, Solder Joint, Grooved and Flared Ends - Incorporating Errata: August 23, 2010 MSS - Manufacturers Standardization Society of the Valve and Fittings Industry. This Standard Practice covers round opening, full, regular and reduced port metal ball valves.
End connections covered herein are threaded, socket welding, solder joint, grooved and flared end in nominal pipe sizes 1/4 through 4 inch.
These valves are intended for on off operation and should be used for modulating or throttling service only when recommended by the manufacturer.
This Standard Practice covers ball valves of the following materials:
Carbon Steel, Alloy Steels, Stainless Steels, Grey Cast Iron, Ductile Iron, Malleable Iron, and Copper Alloy.
INCLUDES 2010 ERRATA SHEET

MSS SP-144

Tue, 01 Jan 2013 00:00:00 GMT

MSS SP-144; Pressure Seal Bonnet Valves MSS - Manufacturers Standardization Society of the Valve and Fittings Industry. This Standard Practice covers construction requirements for steel and alloy valves having pressure seal bonnets in the size range of NPS 2 (DN 50) through NPS 50 (DN 1250) and Pressure Classes 600, 900, 1500, 2500, and 4500. This Standard Practice applies to gate, globe, and check valves and may be used in conjunction with other valve-specific standards; including the following identified in this Standard Practice as parent valve standards:
API 594, Check Valves; Flanged, Lug, Wafer, and Butt-welding
API 600, Steel Gate Valves – Flanged and Butt-welding Ends, Bolted Bonnets
API 603, Corrosion-resistant, Bolted Bonnet Gate Valves – Flanged and Butt-welding Ends
API 623, Steel Globe Valves – Flanged and Butt-welding Ends, Bolted Bonnets
ASME B16.34, Valves-Flanged, Threaded, and Welded End
For parent valve standard, API 600, this Standard Practice covers two styles of pressure seal bonnet valves as follows:
a. Style A valves in accordance with API 600, except modified with ASME B16.34 minimum wall thicknesses, smaller diameter seats and stems, and pressure seal bonnet requirements of this Standard Practice.
b. Style B valves in accordance with API 600, except as modified for pressure seal bonnet requirements of this Standard Practice.
Except for the requirements for modification to pressure seal bonnets and Style A gate valve modifications, and Style B gate valve specific details, the requirements of this Standard Practice are not intended to replace requirements of the parent valve standard. In the event of a discrepancy between this Standard Practice and a governing normative standard affecting valve construction besides the pressure seal, then the governing normative standard shall take precedence.
Stop check valves shall be constructed to the requirements of a globe valve parent valve standard except as modified for pressure seal bonnet requirements of this Standard Practice.
This Standard Practice includes additional construction detail requirements specifically related to parent standard valves modified with pressure seal bonnets.
Annex A illustrates pressure seal bonnet gate valves and a typical pressure seal bonnet detail for the purposes of identifying nomenclature used in this Standard Practice for valve parts.

MSS SP-53

Sun, 01 Jan 2012 00:00:00 GMT

MSS SP-53; Quality Standard for Steel Castings and Forgings for Valves, Flanges, Fittings, and Other Piping Components - Magnetic Particle Examination Method MSS - Manufacturers Standardization Society of the Valve and Fittings Industry. This Standard Practice provides methods and acceptance standards for magnetic particle examination of ferritic steel valves, flanges, fittings, and other piping components by use of dry magnetic powder or wet magnetic particles. It is applicable to the examination of repairs and the initial examination of castings and forgings.
The methods contained in this Standard Practice provide uniform procedures that will produce satisfactory and consistent results upon which the acceptance standards of Table 1 may be used.
This examination guide may be used on a voluntary basis or when specified in an inquiry, contract, or order and when mutually agreed upon by the manufacturer and the purchaser.
This Standard Practice includes the examination of pressure containing castings and forgings.

MSS SP-119

Fri, 01 Jan 2010 00:00:00 GMT

MSS SP-119; Factory-Made Wrought Belled End Pipe Fittings for Socket-Welding MSS - Manufacturers Standardization Society of the Valve and Fittings Industry. GENERAL-This Standard Practice covers the design and manufacturing requirements for factory-made wrought belled end pipe fittings for socket-welding formed from either tubular sections or flat material. Included are the overall dimensions, tolerances, materials, socket end details, heat treatment, marking and other requirements for belled end fittings in sizes NPS 1/2 through 12. The requirements for these belled end fittings are stipulated into each of two pressure service classes: (1) Class MP for stainless steel fittings for use with ASTM A312 pipe; for titanium fittings for use with ASTM B861 or B862 pipe; and aluminum fittings for use with ASTM B241 pipe; and (2) Class MARINE for copper nickel fittings for use with Military Specification MIL-T-16240 pipe or ASTM B466 or B467 pipe.
PARTIAL COMPLIANCE FITTINGS-This Standard Practice may be used to specify Partial Compliance (PC) fittings by agreement between the manufacturer and purchaser. Special considerations include, but are not limited to: dimensions; such as unlisted reducing tee outlet size combinations, or end shapes; such as a street end tee, or custom tolerances. When such fittings meet all other stipulations of this Standard Practice, they shall be considered as being in Partial Compliance herewith, provided they are appropriately marked.
FITTING SHAPES AND TYPES NOT COVERED-This Standard Practice does not cover the design or construction of laterals, wyes, mitered elbows, tees of notch and point or saddle weld types, sweep elbows, sweep tees or any other fitting not described herein by sketch and table.
SERVICE CONDITIONS-This Standard Practice does not cover the criteria for selection of fitting type or fitting materials suitable for a particular fluid type or service.
INSTALLATION WELDING-This Standard Practice does not cover installation-welding requirements. Installation welding shall be done in accordance with the applicable piping system into which the fittings are installed. Pipe joint weld geometry suggestions contained in Section 13 reflect the proportions used in the fatigue tests conducted on pipe pieces used to qualify these fittings for Navy service.