ASME B16.29-2007 pdf – Wrought Copper and Wrought Copper Alloy Solder-Joint Drainage Fittings – DwV.
ASME B16.29 for wrought copper and wrought copper alloy solder- joint drainage fittings, designed for use with copper drainage tube conforming to A5Th4 B 306, covers the following:
(hi pitch (slope)
(ci abbreviations for end connection,,
(d) sizes and method of designating openings for reducing Fittings
(e) marking
(f) material
(g) dimensions and tolerances
1.2 Convention
For the purpose of determining conformance with this Standard, the convention for fixing significant digits where limits (maximum and minimum values) are sped- lied 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. Decimal values and tolerances do not imply a partictibr method of measurensent.
1.3 Relevant Units
This Standard states values in both metric and U.S Customary units. These systems of units are to be regarded .separatelv as standard. Within the text, the U.S. Customary units are shown in parentheses or in separate tables. (Tables showing dimensions in equivalent U.S. Customary units are found in Mandatory Appendix L) The values stated in each system are not exact equivalents; therefore, it Is required that each system of Linus be used independently of the other. Combining values from the two systems constitutes nonconformance with the standard.
1.4 References
Codes, standards, and specifications, containing provisions to the extent referenced herein, constitute requirements of this Standard. These reference documents are listed in Mandatory Appendix II.
10.3 ThreadIng Tolerances
Tapered pipe threads (NPT) shall be checked by use of plug or ring gauges, in either xtandard or limit types. When gauging internal taper threads, the plug gauge shall be scressd handtight into the fitting. The reference point for gaugmg internal product threads depends on thechamferdianieter. When the internal chamferdiameicr exceeds the major diameter of the internal thread. the reference point shall be the last thread scratch on the chamfer cone. Otherwise, when the internal chamfer diameter does not exceed the major diameter of the internal thread, the reference point shall be the end of the fitting. In gauging external taper threads, the ring gauge shall be screwed handlight on the internal thread. On the external thread, the ring gauge shall be flush with the end of the thread. Gauging practices shall be as shown in Notes (3) and (4) of Table 2. Straight pipe threads (Nl’SM) shall be checked by the use of standard GO and NOT CX) plug and ring gauges.
External and internal threaded end’. of Fittings will be furnished with a polygon to facilitate installation.
The maximum allowable %‘ariation in the angular alignment of all openings shall be 5 mm in I m (0.06 in. in I ft) (0.5%), other than in the direction of pitch (see section 3).
13.1 Standard Gauging Method of So4der-joint Ends
The standard method of gauging the diameter tolerances for male and female ends shall be by use of plain plug and ring gauges designed to hold the product within the limits established in Table 1.
13.2 Optional Gauging Method of Solder-joint Ends
For gauging the diameter tolerance of male and female ends, the manufacturer may use direct reading instniments instead of ring and plug gauges as specified in para. 13.1. When gauging the diameters of male and female ends, using direct reading instruments. reter to section 9. In case of a dispute, ring/plug gauges shall be used as the referee method.