Home>ASME standards>ASME B16.29-2007 pdf download

ASME B16.29-2007 pdf download

ASME B16.29-2007 pdf download.Wrought Copper and Wrought Copper Alloy Solder-Joint Drainage Fittings — DWV.
5.1.1 Tube. The size designations for the fitting end configurations defined in Table 1 (Table I-1) correspond to drainage tube sizes defined in ASTM B 306. 5.1.2 Pipe. The size designation of threaded fitting end configurations defined in Table 2 (Table I-2) corres- ponds to thread sizes defined in ASME B1.20.1. 5.2 Identification Fittings shall be identified by the nominal size of the openings in the sequence illustrated in Fig. 1. 6 MARKING Each fitting shall be marked permanently and legibly with the manufacturer’s name or trademark and with DWV (to indicate drain-waste-vent). 7 MATERIAL Fittings shall be made of wrought copper or wrought copper alloy material having not less than 84% ofcopper content. 8 LAYING LENGTHS Due to widely varying manufacturing processes, lay- ing length dimensions of fittings are not standardized. Consult the manufacturer for these dimensions. Sug- gested dimensions, including laying lengths, for various fitting configurations are shown in Tables 3 through 13 (Tables I-3 through I-13). 9 OVALITY Maximum ovality shall not exceed 1% of the maxi- mum diameter shown in Table 1. The average of the maximum and minimum diameters must be within the dimensions shown in the table. 10 THREADED ENDS 10.1 General Fitting threads shall be right hand, conforming to ASME B1.20.1-1983 (R2001). They shall be taper threads (NPT), except for slip joint ends, which shall have straight pipe threads (NPSM). 10.2 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 chamfering 2 shall be concentric with the threads. The length of threads shall be measured to include the countersink or chamfer. 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 chamferdiameter. Whenthe internal chamferdiame- ter 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 toler- ances 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 Forgaugingthe diametertolerance ofmale and female ends, the manufacturer may use direct reading instru- ments 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.

Related PowerPoint Templates

Template Categories
Popular Tags