ASME B16.29:2017 pdf download

ASME B16.29:2017 pdf download Wrought Copper and Wrought Copper Alloy Solder-Joint Drainage Fittings DWV
1 sCOPE
This Standard for wrought copper and wrought copperalloy solder-joint drainage fittings, designed for use with
copper drainage tube conforming to ASTM B306, coversthe following:
(a) description(b) pitch (slope)
c) abbreviations for end connections
(d) sizes and method of designating openings for redu-cing fittings
(e) markingfmaterial
lg) dimensions and tolerances2 GENERAL
2.1 Convention
For determining conformance with this Standard, theconvention for fixing significant digits where limits(maximum and minimum values) are specified shall beas defined in ASTM E29.This requires that an observedor calculated value be rounded off to the nearest unit in thelast right-hand digit used for expressing the limit. Decimalvalues and tolerances do not imply a particular method ofmeasurement.
2.2 Relevant Units
This Standard states values in both Sl (metric) and U.s.Customary units. These systems of units are to beregarded separately as standard.Within the text, the
U.S. Customary units are shown in parentheses or in sepa-rate tables that appear in Mandatory Appendix l. Thevalues stated in each system are not exact equivalents;therefore,it is required that each system of units beused independently of the other. Combining valuesfrom the two systems constitutes nonconformancewith the Standard.
2.3 References
Codes, standards, and specifications, containing provi-sions to the extent referenced herein, constitute require-
ments of this Standard. These reference documents arelisted in Mandatory Appendix IL.
2.4 Quality Systems
Guidelines relating to the product manufacturer’squality system programs are described in Nonmandatoryppendix A.
3 DESCRIPTION
These fittings are designed for drainage and ventsystems only, using the solder-joint method of connection.The fitting cups (C) are provided with stops so that theends of the tube, when assembled,meet the stops.Sketches and designs of fittings are illustrative only.The dimensions specified herein shall govern in all cases.4 PITCH (SLOPE)
All nominal 90-deg fittings shall be pitched to result in aslope of 0.20 mm/m (0.25 in./ft) (2%) of horizontal tubelength with reference to a horizontal plane.
5ABBREVIATIONS
The symbols shown below are used to designate thetype of fitting end.
6 cOMPONENT SIzE
6.1 Nominal size
As applied in this Standard, the use of the phrase“nominal size” followed by a dimensionless number isfor the purpose of fitting end connection sizeidentification.
6.1.1 Tube. The size designations for the fitting endconfigurations defined in Table 1 (Table 1-1) correspondto drainage tube sizes defined in ASTM B306.
6.1.2 Pipe. The size designation of threaded fitting endconfigurations defined in Table 2 (Table 1-2) correspondsto thread sizes defined in ASME B1.20.1.
6.2 ldentification
Fittings shall be identified by the nominal size of theopenings in the sequence illustrated in Figure 1.
7 MARKING
Each fitting shall be marked permanently and legiblywith the manufacturer”s name or trademark and withDwv (to indicate drain-waste-vent).
8 MATERIAL
Fittings shall be made of wrought copper or wroughtcopper alloy material having not less than 84% of coppercontent.
9 LAYING LENGTHS
Due to widely varying manufacturing processes, layinglength dimensions of fittings are not standardized.Consultthe manufacturer for these dimensions. Suggested dimen-sions,including laying lengths, for various fitting config-urations are shown in Tables 3 through 13 (Tables I-3through 1-13).
10 ovALITY
Maximum ovality shall not exceed 1% of the maximumdiameter shown in Table 1 (Table I-1). The average of themaximum and minimum diameters must be within thedimensions shown in the table.
11 THREADED ENDS
11.1 General Fitting threads shall be right hand, conforming to ASME B1.20.1. They shall be American National Standard taper pipe threads (NPT), except for slip-joint ends, which shall have American National Standard free-fitting straight mechanical pipe threads (NPSM).
11.2 Chamfer All internal threads shall be countersunk a distance not 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 cham- fering shall be concentric with the threads. The length of threads shall be measured to include the countersink or chamfer.
11.3 Threading Tolerances
11.3.1 Internal Threads. Variations in NPT internal threading shall be limited to one turn large or one turn small from the gaging notch when using working gages. The reference point for gaging is the starting end of the fitting, provided the chamfer does not exceed the major diameter of the internal thread. When a chamfer on the internal thread exceeds this limit, the reference point becomes the last thread scratch on the chamfer cone.