ASME B16.22:2012 pdf free download

ASME B16.22:2012 pdf free download.Wrought Copper and Copper Alloy Solder-Joint Pressure Fittings.
The largest opening in the fitting shall govern the tolerance to be applied to all openings.
9.3 Ovallty of Fitting End (C or FTG)
Maximum ovality of the fitting solder-joint end shall not exceed 1% of the maximum diameters shown in Table I (Table Il-i). The average of the maximum and minimum diameters shall be within the dimensions shown in the Table.
9.4 Inside Diameter of Fitting
The minimum cross-sectional area of the inside diameter through the fitting body shall not be less than the theoretical minimum area defined by diameter 0 in Table 1 (Table 11.1). The out-of-roundness condition of the cross-sectional area shall not exceed the value shown in Table I (Table Il-I).
For reducer or adapter fittings, the smallest end diameter shall apply, provided that this diameter does not restrict the other outlets.
9.5 Wall Thickness
The minimum wall thickness shall not be less than that shown in Table 1 (Table li-I).
10 ThRE.ADED ENDS
Fitting threads shall be right-hand, conforming to ASME l.2O.1. They shall be taper threads (NI’T).
10.1 CountersInk or Chamfer
All internal threads shall be countersunk a distance no less than one-half the pitch of the thread, at an angle of approximately 45 deg with the axis of the thread. All external threads shall be chamfered at an angle of 30 deg to 45 deg from the axis. Countersinking and chamfering shall be concentric with the threads.
The length of threads shall be measured to include the countersink or chamfer.
10.2 Threading Tolerances
Tapered pipe threads (NPT) shall be checked by use of plug or ring gages in either standard or limit types. When gaging internal taper threads, the plug gage shall be screwed hand-tight into the fitting. The reference point for gaging internal product threads depends on the chamfer diameter. When the internal chamfer diameter exceeds the major diameter of the internal thread, the reference point shall be the last thread scratch on the chamfer cone. Otherwise, when the internal chamfer diameter does not exceed the major diameter of the internal thread, the reference point shall be the end of the fitting. In gaging external taper threads, the ring gage shall be screwed hand-tight on the external thread, On the external thread, the ring gage shall be flush with the end of the thread.
Tolerance loran internal threaded end having an internal shoulder shall he from the gage reference point (notch) to one turn small. Tolerance for an internally threaded end without a shoulder, and for an externally threaded end, shall be from one turn small to one turn large.
10.3 DesIgn of Threaded Ends
The wrenching section of internally threaded ends shall be polygonal, and the wrenching section of externally threaded ends shall be furnished with either polygon or flats, at the manufacturer’s option.