MSS SP-114 Corrosion Resistant Pipe Fittings Threaded and Socket Welding Class 150 and 1000

MSS SP-114 practice for corrosion resistant pipe fittings threaded and socket welding, Class 150 and 1000, establishes requirements for the following:

a) Pressure-temperature ratings
b) Size and method of designating openings of reducing fittings
c) Marking
d) Minimum requirements for materials
e) Dimensions and tolerances
f) Threading
g) Tests

For purposes of MSS SP-114, castings are including for Class 150 fittings only.

The wall thickness of the fittings covered by MSS SP-114 corresponds to Sch40 pipes. When thinner pipe of equivalent material is used, its strength may govern the rating. When Sch40 pipe of equivalent material is used, the strength of the fitting governs the rating.

Marking of Class 150 fittings

a) The manufacturer’s name or trademark
b) Material identification
c) The symbol “SP114” to denote compliance with MSS SP-114
d) Class 150
e) Size
f) Other marking in accordance with MSS SP-25. Where size and shape of fittings do not permit all of the above markings, they may be omitted in the reverse order given
g) The marking of plugs, bushings, and locknuts is not required by MSS SP-114

Marking of Class 1000 fittings

a) The manufacturer’s name or trademark
b) Material identification
c) The symbol “SP114” to denote compliance with MSS SP-114
d) Class 1000 or 1M
e) Size
f) Other marking in accordance with MSS SP-25. Where size and shape of fittings do not permit all of the above markings, they may be omitted in the reverse order given
g) The marking of plugs, bushings, and locknuts is not required by MSS SP-114