ASME B16.15-2018 pdf free

ASME B16.15-2018 pdf free.Cast Copper Alloy Threaded Fittings.
All threads shall be in accordance with ASME B 1.20.1.
7.1.1 CountersInks and Chamfers. All internal taper pipe threads shall be countersunk or chamfered 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. 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 concentric with the threads. The length of threads specified In all tables shall be measured to include the countersink or chamfer.
7.L2 ALignment. The maximum allowable variation in thealignment of threads ofall openings shall be 5.0 mm/rn (0.06 in./R).
7.L3 Internal ThreadIng
(a) All fittings with internal threads except as allowed in (b) shall be threaded with ASME 81.20.1 NPT threads. The reference point for gaging is the starting end of the fitting, provided the chamfer does not exceed the mabor diameter of the internal thread. When a chamfer on the internal thread exceeds this limit, the reference point becomes the bst thread scratch on the chamfer cone
(b) Wrought couplings (Table 7.1.3-I), wrought caps (Table 7.1.3.2). and wrought bushings (Table 7.1.3.3)
in sizes NPS ‘4 NPS ‘4. NI’S %, and NI’S shall have NPT or NPSC internal threads.
7.1.4 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 pornt becomes the last thread scratch on the chamfer cone.
7.2 Gaghig Tolerances
For taper pipe threads, the variation in threading shall be limited to one turn large or one turn small from the gaging notch on the plug or the gaging face of the ring when using worhing gages For straight pipe thrtads, the variation in threading shall be limited to 114 turns large or 1/2 turns small from the gaging notch on the plug when using working gages.
8 RIBS
The addition of ribs or lugs Is permitted on threaded pipe fittings. Where ribs are used, it is recommended that their thickness be the same as specified for the metal thickness of the pipe fitting.ASME B16.15 pdf download.