Abstract： ASME B16.14:2013 pdf download.Ferrous Pipe Plugs,Bushings, and Locknuts With Pipe Threads. 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 Threadin...

ASME B16.14:2013 pdf download.Ferrous Pipe Plugs,Bushings, and Locknuts With Pipe Threads.

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 ASMF 131.20.1 NPT threads.

The reference point For gaging 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 131.20.1 NI’T 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. L.ocknuts shall be threaded with ASME 61.20.1 NPSI. 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.

9 PATTERN TAPER

Plug squares or hexagons. raised or countersunk, may have opposite sides tapered a maximum of 4 deg total.

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