ASME B16.29-2007 pdf download
ASME B16.29-2007 pdf download.Wrought Copper and Wrought Copper Alloy Solder-Joint Drainage Fittings一DWV.
ASME B16.29 for wrought copper and wrought copper alloy solder-joint drainage fittings, designed for use with copper drainage tube conforming to ASTM B 306, covers the following:
(a) description
(b) pitch (slope)
(c) abbreviations for end connections
(d) sizes and method of designating openings for reducing fittings
(e) marking
(if,) 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 specified 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 particular method of measu rement.
1.3 Relevant Units
This Standard states values in both 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. (Tables showing dimensions in equivalent U.S. Customary units are found in Mandatory Appendix I.) 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.
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 standard or limit types. When gauging internal taper threads, the plug gauge shall be screwed handtight into the fitting. The reference point for gauging internal product threads depends on the chamfer diameter. When the internal chamfer diameter 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 handtight 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 (NPSM) shall be checked by the use of standard GO and NOT GO plug and ring gauges.
11 DESIGN OF THREADED ENDS
External and internal threaded ends of fittings will be furnished with a polygon to facilitate installation.
12 ALIGNMENT
The maximum allowable variation in the angular alignment of all openings shall be 5 mm in 1 m (0.06 in. in 1 ft) (0.5%), other than in the direction of pitch (see section 3).
13 GAUGING
13.1 Standard Gauging Method of Solder-Joint Ends
The standard method of gauging the diameter tolerances for male and female ends shall he by use of plain plug and ring gauges designed to hold the product rjthjn 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 instruments 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, refer to section 9. In case of a dispute, ring/plug gauges shall be used as the referee method.
