ASME B16.22-2012 pdf download
ASME B16.22-2012 pdf download.Wrought Copper and Copper Alloy Solder-Joint Pressure Fittings.
1 SCOPE This Standard establishes specifications for wrought copper and wrought copper alloy, solder-joint, seamless fittings, designed for use with seamless copper tube conforming to ASTM B88 (water and general plumbing systems), B280 (air conditioning and refrigeration ser- vice), and B819 (medical gas systems), as well as fittings intended to be assembled with soldering materials con- forming to ASTM B32, brazing materials conforming to AWS A5.8, or with tapered pipe thread conforming to ASME B1.20.1. This Standard is allied with ASME B16.18, which cov- ers 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 result in nonconformance with the Standard. 2.2 References Standards and specifications adopted by reference in this Standard are shown in Mandatory Appendix III. It is not considered practical to identify the specific edition of each standard and specification in the individual ref- erences. Instead, the specific edition reference is identi- fied in Mandatory Appendix III. 1 2.3 Quality Systems Requirements relating to the product manufacturer’s quality system program are described in Nonmandatory Appendix B. 3 PRESSURE–TEMPERATURE RATINGS 3.1 Rating of Fittings and Joints The internal pressure–temperature rating for a solder- joint system is dependent upon not only fitting and tube strength, but also composition of the solder used for the joint and selection of valves and appurtenances. 3.1.1 Solder Joints. Pressure–temperature ratings for solder joints to the dimensions of Table 1 (Table II-1), made with typical commercial solders, are given in Table I-1 (Table II-4). The internal pressure–temperature rating of the sys- tem with solder joints shall be the lowest of the values shown in Table 2 (Table II-2) and Table I-1 (Table II-4) and those of the tube, valves, and appurtenances. 3.1.2 BrazeJoints. Pressure–temperature ratings for braze joints to the dimensions of Table 1 (Table II-1), made with typical commercial brazing materials, shall be considered equal to the values given in Table 2 (Table II-2). The internal pressure–temperature rating of the sys- tem with braze joints shall be the lowest of the values shown in Table 2 (Table II-2) and those of the tube, values, and appurtenances. 3.2 Bursting Strength Fittings manufactured to the Standard shall have an ambient temperature bursting strength of at least four times the 38°C (100°F) internal pressure rating as shown in Table 2 (Table II-2). 4 TERMINOLOGY 4.1 Size The size of the fittings shown in Table 1 (Table II-1) corresponds to standard water tube size as shown in ASTM B88. The size of the threaded ends corresponds to nominal pipe size as shown in ASME B1.20.1. Fittings are designated by the size of the openings in the sequence illustrated in Fig. 1.
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 II-1). The average of the maximum and minimum diameters shall be within the dimensions shown in the Table. 9.4 Inside Diameter of Fitting Theminimumcross-sectionalareaoftheinside diame- ter through the fitting body shall not be less than the theoretical minimum area defined by diameter O in Table 1 (Table II-1). The out-of-roundness condition of the cross-sectional area shall not exceed the value shown in Table 1 (Table II-1). For reducer or adapter fittings, the smallest end diam- eter 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 II-1). 10 THREADED ENDS Fitting threads shall be right-hand, conforming to ASME B1.20.1. They shall be taper threads (NPT). 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.
