ASME B16-14 pdf free download

ASME B16-14-2013 pdf free download.Ferrous Pipe Plugs, Bushings, and Locknuts With Pipe Threads.
PRESSURE-TEMPERATURE RATINGS
(a) Pressure- temperature ratings for plugs and bush- ings shall be in accordance with ASME B16.4 if made of cast iron, or ASME B16.3 if made of malleable iron, ductile iron, or steel. Use of cored plugs or hexagon head bushings should be limited to Class 125 cast iron and Class 150 malleable iron threaded fittings. Solid plugs and face bushings are recommended for use with Class 250 cast iron fttings and Class 300 malleable iron fittings.
(b) Locknuts are not pressure-temperature rated.
4 NOMINAL PIPE SIZE As applied in this Standard, the use of the phrase “nominal pipe size” or the designation NPS followed by a dimensionless number is for identifying the end connection of fittings. The number is not necessarily the same as the fitting inside diameter.
5 MARKING
Each fitting shall be marked for identification with the manufacturer ‘s name or trademark, except where a marking is impractical.
6 MATERIALS
(a) These fttings are furnished in gray iron, malleable iron, ductile iron, or steel as indicated in the individual tables.
(b) The chemical and mechanical properties of cast material shall equal or exceed those properties listed in ASTM A126, as applicable. Steel castings, forgings, or machined bar properties shall correspond to the compa- rable ASTM casting material specifications. The fittings manufacturer shall be prepared to certifty conformance based on test data.
7 DIMENSIONS AND TOLERANCES
(a) Dimensions in metric units are given in Tables 1 through 5 for various types of fittings. Corresponding U.S. Customary values are given in Tables 1-1 through 1-5 in Mandatory Appendix I.
(b) At no point in the component wall shall the metal thickness be less than 90% of the values listed in the tables.
8 THREADS 8.1 Thread Form All threads shall be in accordance with ASME B1.20.1.
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 incude 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 ittings 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 ftting, 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. 9 PATTERN TAPER Plug squares or hexagons, raised or countersunk, may have opposite sides tapered a maximum of 4 deg total.ASME B16-14 pdf download.