ASME B16.14:2013 pdf free download

ASME B16.14:2013 pdf free download
ASME B16.14:2013 pdf free download.Ferrous Pipe Plugs, Bushings, and Locknuts With Pipe Threads
8.1.1 Countersinks and Chamfers. All internal taper pipe threads shall be countersunk or chamfered a dis- tance of not less than one-half the pitch of the thread at an angle of approximately 45 deg with the axis of the thread. External taper pipe threads shall be chamfered at an angle between 30 deg and 45 deg with the axis,for easier entrance in making a joint and protection of the thread. Countersinking and chamfering shall be con- centric with the threads. The length of threads specified in all tables shall be measured to include the countersink or chamfer.
8.1.2 Alignment. The maximum allowable variation in the alignment of threads of all openings shall be 5.0 mm/m (0.06 in./ft).
8.1.3 Internal Threading. All fittings with internal threads, except locknuts, shall be threaded with ASME B1.20.1 NPT threads. The reference point for gag- ing 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.
8.1.4 External Threading. All externally threaded fittings shall be threaded with ASME B1.20.1 NPT threads. The reference point for gaging is the end of the thread, provided the chamfer is not smaller than the minor diameter of the external thread. When a chamfer on the external thread exceeds this limit, the reference point becomes the last thread scratch on the chamfer cone.
8.1.5 Locknuts. Locknuts shall be threaded with ASME B1.20.1 NPSL threads.
8.2 Gaging Tolerances
For taper pipe threads, the variation in threading shall be limited to one turn large or small from the gaging notch on the plug or the gaging face of the ring when using working gages.