1.1 Scope

This Standard covers ratings, dimensions, tolerances,marking, and material requirements for forged fittings,both socket-welding and threaded, as illustrated inTables 1 through 5 and Tables I-1 through I-5, inclusive.

1.1.1 Fitting Types/Configuration. Types of fittingscovered by this Standard are shown in Table 6, by classand size range. Fittings shown in Tables 1 through 5and Tables I-1 through I-5 may also be made with combinationsof socket-welding and threaded ends.

1.1.2 Special Fittings. Fittings with special dimensions,threads, or counterbores may be made byagreement between the manufacturer and purchaser.When such fittings meet all other stipulations of thisStandard, they shall be considered in compliance therewith,provided they are appropriately marked (seesection 4).

1.1.3 Welding. Installation welding requirementsare not within the scope of this Standard. Installationwelding shall be in accordance with the applicable pipingCode or regulation covering the piping system intowhich the fittings are installed.