ASME B16.11 Standard covers ratings, dimensions, tolerances, marking, and material requirements for forged fittings, both socket-welding and threaded, as illustrated inTables 1 through 6 and Tables I-1 through I-6, inclusive.
1.1.1 Fitting Types/Configuration. Types of fittings covered by this Standard are shown in Table 7, by class and size range. Fittings shown in Tables 1 through 6 and Tables I-1 through I-6 may also be made with combinations of socket-welding and threaded ends.
1.1.2 Special Fittings. Fittings with special dimen- sions, threads, or counterbores may be made by agree-ment between the manufacturer and purchaser. When such fittings meet all other stipulations of this Standard, they shall be considered in compliance there-with, provided they are appropriately marked (see section 4).
1.1.3 Welding. Installation welding requirements are not within the scope of this Standard. Installation welding shall be in accordance with the applicable piping Code or regulation covering the piping system into which the fittings are installed.