ASME B16.23:2016 pdf free download – Cast Copper Alloy Solder Joint Drainage Fittings: DWV
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 or in separate tables that appear in Mandatory Appendix I. The values stated in each system are not exact equiva- lents; 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 I, which is part of this Standard. It is not considered practi- cal to identify the specific edition of each standard and specification in the individual references. Instead, the specific edition reference is identified in Mandatory Appendix II.
2.3 Quality Systems
Requirements relating to the product manufacturer’s quality system programs are described in Nonmandatory Appendix A.
3 DESCRIPTION
(a) These fttings are designed for drainage and vent systems using the solder joint method of connection. The fitting cups (9, are provided with stops so that the ends of the tube, when assembled, meet the stops, thereby forming essentially smooth passageways.
(b) The sketches and designs of fttings are ilustrative only. The dimensions specified herein shall govern in all cases.
4 PITCH (SLOPE)
All nominal 90-deg fttings shall be pitched to result in a slope of 21 mm/m (0.25 in./ft) (2.1%) of length of horizontal tube with reference to a horizontal plane (see Fig. 1).
9 METAL THICKNESS
Dimensional variations will occur in the casting pro- cess. Pattern equipment shall be designed to produce the metal thickness given for fittings in Table 2 or Table I-2. Any final fitting metal wall thickness less than 90% of the thickness given in the table is unacceptable.
10 INSPECTION TOLERANCE
10.1 Convention For determining conformance with this Standard, the convention for fixing significant digits where limits (maximum and minimum values) are specified shall be as defined in ASTM E29. This requires that an observed or calculated value be rounded off to the nearest unit in the last right-hand digit used for expressing the limit. Decimal values and tolerances do not imply a particular method of measurement.
10.2 Linear Dimensions DWV fttings covered by this Standard shall conform to the laying lengths specified in Tables 4 through 56 and Tables I-4 through I-56. An inspection tolerance, as shown in Table 1 or Table I-1, shall be allowed on center- to-shoulder, center-to-threaded end, and shoulder-to- threaded end dimensions on all fttings having internal solder (cup) ends; and on center-to-solder end, solder end-to-shoulder, and solder end-to-threaded dimen- sions on all fttings having external solder (itting) ends. The largest opening in the ftting governs the tolerance to be applied to all openings. The inspection tolerance for laying length dimensions A, B, and C (in Table 4 or Table I-4) shall be double those shown above, except the minus tolerance applied to couplings; dimension A shall not result in a dimension less than 2.3 mm (0.09 in.).