ASME B16.22:2018 pdf download

ASME B16.22:2018 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), ASTM B280 (air conditioning and refrigeration service), and ASTM B819 (medical gas systems), as well as fittings intendedto beassembledwithsolderingmaterials conformingtoASTM B32,brazingmaterials conformingto AWS A5.8, or 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 require- ments for fitting ends suitable for soldering. This Standard covers the following: (a) pressure–temperature ratings (b) abbreviations for end connections (c) size and method ofdesignating openings offittings (d) marking (e) material (f) dimensions and tolerances (g) tests
2 GENERAL
2.1 Relevant Units This Standard states values in both SI (metric) and U.S. Customary units. These systems of units are to be regarded separately as standard. Within the text, the U.S. Customary units are shown in parentheses. The values stated in each system are not exact equivalents; therefore, it is required that each system of units be used independently of the other. Combining values from the two systems constitutes nonconformance with the Standard. 2.2 References Standards and specifications adopted by reference in this Standard are shown in Mandatory Appendix II. It is not considered practical to identify the specific editionofeachstandardandspecificationintheindividual references. Instead, the specific edition reference is iden- tified in Mandatory Appendix II.
3 PRESSURE–TEMPERATURE RATINGS
3.1 Rating of Fittings and Joints The internal pressure–temperature rating for a solder- joint system is dependent on 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 solderjoints to thedimensions ofTable3.1.1-1, made with typical commercial solders, are given in Table I-1. Theinternalpressure–temperatureratingofthesystem with solder joints shall be the lowest ofthe values shown inTable 3.1.1-2 andTable I-1 and those ofthe tube, valves, and appurtenances. 3.1.2 Braze Joints. Pressure–temperature ratings for braze joints to the dimensions of Table 3.1.1-1, made with typical commercial brazing materials, shall be considered equal to the values given in Table 3.1.1-2. Theinternalpressure–temperatureratingofthesystem withbrazejoints shallbe thelowestofthevalues shownin Table 3.1.1-2 and those of the tube, valves, and appurtenances. 3.2 Bursting Strength Fittings manufactured to the Standard shall have an ambient-temperature bursting strength of at least 4 times the 38°C (100°F) internal pressure rating as shown in Table 3.1.1-2.
9 INSPECTION TOLERANCE
9.1 Convention For determining conformance with this Standard, the convention for fixing significant digits where limits (maximum or minimum values) are specified shall be as defined in ASTM E29. This requires that an observed orcalculatedvalueberoundedofftothenearestunitinthe lastright-hand digitused forexpressingthe limit. Decimal values and tolerances do notimplya particular method of measurement. 9.2 Linear Dimensions An inspection tolerance, as shown in Table 9.2-1, shall be allowed on center-to-shoulder, center-to-center, center-to-threaded-end, and shoulder-to-threaded-end dimensions on all fittings having internal (C) solder ends, as well as on center-to-solder-end and solder- end-to-threaded-end dimensions on all fittings having external (FTG) solder ends. Couplinginspectionlimitsforshoulder-to-shoulderand shoulder-to-end dimensions shall be double those shown in Table 9.2-1, except that the minus tolerance applied to dimension L (see Figure 4.1-1) shall notresultin a dimen- sion smaller than 1.5 mm (0.06 in.). The largestopening in the fitting shall govern the toler- ance to be applied to all openings.