ASME B16.18 pdf free download

ASME B16.18-2001 pdf free download.CAST COPPER ALLOY SOLDER JOINT PRESSURE FITTINGS.
This Standard for cast copper alloy solder joint pressure fittings designed for use with copper water tube, establishes requirements for: (a) pressure-temperature ratings; (b) abbreviations for end connections; (c) sizes and method of designating openings of fitings; (d) marking; (e) material; (0) dimensions and tolerances; and (g) tests.
1.2 Units of Measurement The values stated in either U.S. Customary (inch- lb.) or SI (metric) units of measure shall be regarded separately as standard. Within the main text, U.S. Customary units are given. For convenience, the SI units are shown in parentheses and in Nonmandatory Annex B. 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 IWo systems may result in nonconformance with the Standard.
1.3 Convention For the purpose of determining conformance with this Standard, the convention for fixing significant digits where units, maximum or minimum values, are specifed shall be“rounding off” as defined in ASTM Practice 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.
1.4 References Standards and specifications adopted by reference in this Standard are shown in Nonmandatory Annex D, which is part of this Standard. 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 Nonmanda- tory Annex D.
1.5 Quality System Requirements relating to the product manufacturer s Quality System Programs are described in Nonmanda- tory Annex E.
2 PRESSURE-TEMPERATURE RATINGS
2.1 Rating of Fitting and of Joint The internal working-pressure-temperature rating for a solder joint fiting is dependent not only on ftting and tube strength, but also on the composition of the solder used for the joint and selection of valves and appurtenances. The internal working-pressure ratings of the system shall be the lowest of the values shown in Table 1 and Nonmandatory Annex A, and those of the tube, valves, or appurtenances. Pressure-temperature ratings for solder joints to the dimensions of Table 3, made with typical commercial solders, are given in Nonmandatory Annex A. 2.2 Bursting Strength When tested at 73°F+5°F (23°C+2°C) fitings manu- factured to this standard shall have an ambient-tempera- ture bursting strength of at least four times the 100°F (38°C) internal working-pressure rating as shown in Table 1.
3 ABBREVIATIONS The following symbols are used to designate the type of fiting end: C = solder-joint ftting end made to receive cop- per tube diameter (female) FTG = solder-joint ftting end made to copper tube diameter (male) F = intermal ANSI standard taper pipe thread (female) NPT M = extermal ANSI standard taper pipe thread (male) NPT
4 SIZE The size of the fttings shown in Table 3 and Table A1 corresponds to standard water tube size as shown in ASTM B 88, Specification for Seamless Copper Water Tube. The size of the threaded ends corresponds to nominal pipe size as shown in ASME B 1.20.1. Fittings are designated by the size of the openings in the sequence ilustrated in Fig. 1. 5 MARKING Each fiting shall be permanently marked with the manufacturer’ s name or trademark and other applicable markings as required by MSS SP- 25. Marking of fttings less than Standard Water Tube Size么or on any ftting where it damages soldering surfaces is not required. 6 MATERIAL Castings shall be copper alloy produced to meet: (a) the requirement of ASTM B 62 Alloy C83600; (b) the chemical and tensile requirements of ASTM B 584 Alloy C83800 or C84400 and in all other respects comply with the requirements of ASTM B 62.ASME B16.18 pdf download.