Abstract： ASME B16.23:2011 pdf download.Cast Copper Alloy Solder Joint Drainage Fittings: DWV. (b) Optional Caitiç Joint Ends. For gaging the diameter tolerance of male and female ends, the manufacturer may use direct reading instruments instead of...

ASME B16.23:2011 pdf download.Cast Copper Alloy Solder Joint Drainage Fittings: DWV.

(b) Optional Caitiç Joint Ends. For gaging the diameter tolerance of male and female ends, the manufacturer may use direct reading instruments

instead of ring and plug gages as specified in para. (a). When gaging the diameters of male and female ends, using direct reading

instruments, refer to para. 10.3.

11 THREADED ENDS

11.1 General

Threaded ends shall conform to the dimensional requirements contained within Table 3 or Table 1-3. Fitting threads shall be

right-hand, conforming to ASME 81.20.1. They shall be taper threads (NPT) except for slip joint ends, which shall have straight

pipe threads

(NPSM).

11.2 Thread Dimensions

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 he chamfered at an angle of 30 deg to 45 deg from the axis. This facilitates joint assembly and thread

protection. Countersinking and chamfering shall be concentric to the threads. The length of threads specified in all tables shall

be measured to include the countersink or chamfer.

11.3 Threading Tolerances

Tapered pipe threads (N PT) shall be checked by use of working plug or ring gages either standard or limit types. Cages shall be

threaded hand tight. The reference point for gaging internal taper threads, the plug gage, shall be screwed hand tight into the

fitting. Internal product threads depend upon the chamfer diameter.

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