ASME B16.22:2012 pdf free download

ASME B16.22:2012 pdf free download.Wrought Copper and Copper Alloy Solder-Joint Pressure Fittings.
ASME B16.22 establishes specifications for wrought copper and wrought copper alloy, solder-joint, seamless fittings, designed for use with seamless copper tube conforming to ASTM 888 (water and general plumbing systems), 13280 (air conditioning and refrigeration service), and 13819 (medical gas systems), as well as fittings intended to be assembled with soldering materials conforming to ASTM 1332, brazing materials conforming to AWS A5.8, or with tapered pipe thread conforming to
ASME 81.20.1.
This Standard is allied with ASMIi 1316.18, which covers cast copper alloy pressure fittings. It provides requirements for fitting ends suitable for soldering. This Standard covers the following:
(a) pressure—temperature ratings
(b) abbreviations for end connections
(C) size and method of designating openings of fittings
(d) marking
(e) material
(f) dimensions and tolerances
(g) tests
2 GENERAL
2.1 Units of Measure
The values stated in either SI (metric) or U.S. Customary (in.-lb) units of measure shall be regarded separately as standard. Within the main text, SI units are given. For convenience, the customary units are shown in Mandatory Appendix II. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other.
NOTE: Combining values from the two systems may rvsult in nonconformance with the Standard.
2.2 References
Standards and specifications adopted by reference in this Standard are shown in Mandatory Appendix Ill. It is not considered practical to identify the specific edition of each standard and specification in the individual references. Instead, the specific edition reference is identified in Mandatory Appendix Ill.
The largest opening in the fitting shall govern the tolerance to be applied to all openings.
9.3 OvaLity 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 1 (Table lI-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 Il-i). 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 Il-I).
10 THREADED ENDS
Fitting threads shall be right-hand, conforming to ASME 81.20.1. They shall be taper threads (N19).
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 dcg 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 referencepoint for gaging internal product threads depends on thechamfer diameter. When the internal chamfer diameterexceeds the major diameter of the internal thread, thereference point shall be the last thread scratch on thechamfer cone.Otherwise,when the internal chamferdiameter does not exceed the major diameter of theinternal thread, the reference point shall be the end ofthe fitting. In gaging external taper threads,the ringgage shall be screwed hand-tight on the external thread.On the external thread, the ring gage shall be flush withthe end of the thread.
Tolerance for an internal threaded end having an inter-nal shoulder shall be from the gage reference point(notch) to one turn small. Tolerance for an internallythreaded end without a shoulder, and for an externallythreaded end, shall be from one turn small to oneturn large.
10.3 Design of Threaded Ends
The wrenching section of internally threaded endsshall be polygonal, and the wrenching section of exter-nally threaded ends shall be furnished with either poly-gon or flats, at the manufacturer’s option.