ASME B16.22 pdf download WROUGHT COPPER AND COPPER ALLOY SOLDER JOINT PRESSURE FITTINGS
1.1 General 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 B 88 (water and general plumbing systems), B 280 (air conditioning and refrigeration service), and B 819 (medical gas systems), as well as fittings intended to be assembled with soldering materials conforming to ASTM B 32, 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 covers cast copper alloy pressure fittings. It provides requirements for fitting ends suitable for soldering. This Standard covers:
(a) pressure–temperature ratings;
(b) abbreviations for end connections;
(c) size and method of designating openings of fit- tings;
(f) dimensions and tolerances; and (g) tests.
1.2 Convention For the purpose of determining conformance with this Standard, the convention for fixing significant digits where limits (maximum or minimum values) are specified shall be rounding off as defined in ASTM E 29. This requires that an observed or calculated value shall be rounded off to the nearest unit in the last right- hand digit used for expressing the limit.
1.3 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.
1.4 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 individ- ual references. Instead, the specific edition reference is identified in Appendix III.
1.5 Quality Systems Requirements relating to the product manufacturer’s quality system program are described in Nonmandatory Appendix B.
2 PRESSURE–TEMPERATURE RATINGS
2.1 Rating of Fittings and Joints The internal working 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 appurte- nances. Pressure–temperature ratings for solder joints to the dimensions of Table 3 (Table II3), made with typical commercial solders, are given in Table I1 (Table II4). The internal working-pressure rating of the system shall be the lowest of the values shown in Table 1 (Table II1) and Table I1 (Table II4), and those of the tube, valves, or appurtenances.
2.2 Bursting Strength Fittings manufactured to the Standard shall have an ambient temperature bursting strength of at least four times the 38°C (100°F) rated internal working pressure as shown in Table 1 (Table II1).
3.1 Abbreviations The following symbols are used to designate the type of fitting end: C p solder-joint fitting end made to receive cop- per tube diameter (female) F p internal ANSI standard taper pipe-thread end (female) NPTI FTG p solder-joint fitting end made to copper tube diameter (male) M p external ANSI standard taper pipe-thread end (male) NPTE 3.2 Definitions out-of-roundness: maximum measured diameter minus minimum measured diameter. ovality: elliptical condition associated with out-ofroundness.
4 SIZE The size of the fittings shown in Table 3 (Table II3) corresponds to standard water tube size as shown in ASTM B 88. 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.
5 MARKING Each fitting shall be permanently marked with the manufacturer’s name or trademark in accordance with MSS SP-25. Marking on fittings less than size 1 ⁄ 2 or on any fitting where it damages soldering surfaces is not required.