ASME B16.11:2016 pdf free download

ASME B16.11:2016 pdf free download
ASME B16.11:2016 pdf free download.FORGED FITTINGS, SOCKET-WELDING AND THREADED
6.3.3 ExternalThreads.Allexternallythreadedfittings shall be threaded with American National Standard Taper Pipe Threads (ASME B1.20.1), and the variation in threading shall be limited to one turn large or one turn small from the gage face of ring when using working gages. 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.
6.3.4 Countersink or 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 degwith the axis ofthe thread, and all external threads shall be chamferedatanangle of30 degto 45 deg from the axis, for easier entrance inmaking a jointand protectionof the thread. Countersinking and chamfering shall be concentric with the threads. The length of threads speci- fied in all tables shall be measured to include the counter- sink or chamfer.
6.4 Collars
Endcollarsofbothsocket-weldingandthreadedfittings shall be such that they overlap the crotch area as illu- strated in the sketches in Tables 1, 3, I-1, and I-3.
6.5 Reducing Fittings
Reducing fittings, combination straight and reducing threaded × threaded, threaded × socket welding, and socket welding × socket welding couplings shall have the same center-to-end, center-to-bottom of socket, band diameter, and outside diameters as the uniform size fitting corresponding to the largest size end connec- tion of the reducing fitting.
7.1 Concentricity of Bores
The socketand fittingbores shall be concentric within a tolerance of0.8 mm (0.03 in.) forall sizes. Opposite socket bores shall be concentric within a tolerance of 1.5 mm (0.06 in.) for all sizes.
7.2 Coincidence of Axes
The maximum allowable variation in the alignment of the fitting bore and socket bore axes shall be 1 mm in 200 mm (0.06 in. in 1 ft). The maximum allowable varia- tion in alignment of threads shall be 1 mm in 200 mm (0.06 in. in 1 ft).