ASME B16.11-2009 pdf download

ASME B16.11-2009 pdf download.Forged Fittings, Socket-Welding and Threaded.
6.3 Threaded Fittings 6.3.1 Wall Thickness. The body or end wall thick- ness of threaded fittings shall be equal to or greater than the minimum values, G, as shown in Tables 2 through 4 or Tables I-2 through I-4. 6.3.2 Internal Threading. All fittings with internal threads shall be threaded with American National Standard Taper Pipe Threads (ASME B1.20.1). Variations in threading shall be limited to one turn large or one turn small from the gaging notch when using working gages. 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. 6.3.3 External Threads. All externally threaded fit- tings 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. 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 deg with the axis of the thread, and all external threads shall be chamfered at an angle of 30 deg to 45 deg from the axis, for the purpose of easier entrance in making a joint and protection of the thread. Counter- sinking and chamfering shall be concentric with the threads. The length of threads specified in all tables shall be measured to include the countersink or chamfer. 9 6.4 Collars End collars of both socket-welding and threaded fit- tings shall be such that they overlap the crotch area as illustrated in the sketches in Tables 1, 2, I-1, and I-2. 6.5 Reducing Fittings Reducing fittings 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 connection of the reducing fitting. 7 ADDITIONAL TOLERANCES Additional tolerances are those not listed in Tables 1 and I-1. 7.1 Concentricity of Bores The socket and fitting bores shall be concentric within a tolerance of 0.8 mm (0.03 in.) for all 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 variation in alignment of threads shall be 1 mm in 200 mm (0.06 in. in 1 ft). 8 PROOF TESTING Proof testing for fittings made to this Standard is not required.
4.1.2 Omission of Markings. Where size and shape of fittings do not permit all of the above markings, they may be omitted in the reverse order given above. 5 MATERIAL 5.1 Standard Materials Fittings shall be made of materials consisting of forg- ings, bar, seamless pipe, or seamless tubular products. These materials shall conform to the requirements for the WP seamless construction materials ofASTM Fitting Specifications A 234, A 403, A 420, A 815, or B 366 or ASTM Forging Specifications A 105, A 182, A 350, B 462, or B 564. Tees, elbows, and crosses shall not be made from bar stock. 6 DIMENSIONS 6.1 General Unless otherwise noted, the dimensions withouttoler- ances for socket-welding fittings given in Tables 1 and I-1 and the dimensions without tolerances for threaded fittings given in Tables 2 through 5 and Tables I-2 through I-5 are nominal values and subject to the desig- nated manufacturing tolerances. 6.2 Socket Fittings 6.2.1 BodyWall Thickness. The body wall thickness of socket-welding fittings shall be equal to or greater than the values, G, shown in Tables 1 and I-1. 6.2.2 Socket Wall Thickness. The socket wall aver- age thickness and minimum thickness shall be no less than the corresponding values, C, shown in Tables 1 and I-1. 6.2.3 Socket Position. The fixed position for the bottom of the socket with reference to the centerline of the socket-welding fitting shall be maintained as required by the dimensions, A, of Tables 1 and I-1. For reducing fittings, see para. 6.5.