MSS SP 79
Socket Welding Reducer Inserts
|Publication Date:||1 January 2018|
General This Standard Practice covers ratings, dimensions, tolerances, finish, marking and material requirements for socket-welding reducer inserts for use with ASME B16.11, Class 3000 and 6000 socket-welding fittings. U.S. customary unit dimensions for these reducer inserts are shown in Table 3 and SI (metric) dimensions are shown in Table 3M.
Fitting Sizes/Pipe Correlation Fittings covered by this Standard Practice are shown in Table 1, by class, size range and correlation to the schedule number or wall designation of pipe for calculation of ratings.
Partial Compliance Fittings Fittings with special dimensions and fittings made from nonstandard materials may be designed and manufactured by agreement between the manufacturer and the purchaser, provided they are marked in accordance with the requirements for partial compliance fittings of Section 5.1.1(e).
Welding Installation welding requirements are not within the scope of this Standard Practice, except for:
(1) The CAUTIONARY NOTE REGARDING INSTALLATION OF SOCKET-WELDED JOINTS (see Section 12)
(2) The WELDING GAP AND MINIMUM SOCKET WALL THICKNESS (see Figure 1)
(3) The GAP RECOMMENDATIONS (see Figure 2). Installation welding shall be done in accordance with the applicable piping system into which the fittings are to be installed.