ASME B16.50-2018 pdf free
ASME B16.50-2018 pdf free.Wrought Copper and Copper Alloy Braze-Joint Pressure Fittings.
An inspection tolerance, as shown in Table 9.2-1. shall be allowed on center-to- shoulder. ccnter-to-center, center-to-threaded-end, and shoulder-to-threaded-end dimensions on all fittings having Internal (C) braze ends, as well as on center-to-braze-end and braze-endoihreaded -end dimensions on all fluings having external (FTG) braze ends. Coupling inspection limits for shoulder- to-shoulder and shoulder-to-end dimensions shall be double those shown in Table 9.2-I. exccpt that the minus tolerance applied to dimension L (Figure 4.1-1) shall not result In a dimension less than 1.5 mm (0.06 in.). The largest opening in the fimng shall govern the tolerance to be applied to all openings.
9.3 OvaLity of Fitting End (C or FIG)
Maximum ovality of the fitting braze-joint end shall not exceed 1% otthe maximum diameters shown In Table 3.)- 1. The average of the macmum and minimum diameters shall be within the dimensions shown in the table.
9.4 InsIde Diameter of Fitting
The minimum cross-sectional area of the inside diameter through the fitting body shall not be less than the theoretical minimum area defined by diameter 0 in Table 3.1-1. The out-of-roundness condition of the cross-sectional area shall not exceed the value shown In Table 3.1-1.
For reducer or adapter fittings, the smallest end diameter shall apply, provided that this diameter does not restrict the other outlets.
9.5 WaLL Thickness
The minimum wall thickness shall not he less than shown in Table 3.1-1.
10 THREADED ENDS
Fitting threads shall be flght-hand. conforming to ASH E B1.20.1. They shall be taper threads (NPT).
10.1 Countersink or Chamfer
All internal threads shall be countersunk a distance no less than one-half the pitch of the thread, at an angle of approximately 45 deg with the axis of the thread. All external threads shall be chamfered at an angle of 30 de to 45 drg from the axis. Countersinking and chamlering shall be concentnc with the threads.
10.2 Threading Tolerances
Tape red pipe threads (N PT) shall be checked by use of plug or sing gages In either standard or limit types. When gaging internal taper threads, the plug gage shall be screwed hand-tight into the fitting. The reference point for gagrng internal product threads depends on the chamfer diameter. When the internal chamfer diameter exceeds the major diameter of the internal thread, the reference point shall be the last thread scratch on the chamfer cone. Otherwise, when the internal chamfer diameter does not exceed the major diameter of the internal thread, the reference point shall be the end of the fitting. In gaging external taper threads, the sing gage shall be screwed hand-tight on the external thread. On the external thread, the ring gage shall be flu.sh with the end of the thread.
Tolerance for an Internally threaded end having an Internal shoulder shall be from the gage reference point (notch) to one turn small. Tolerance for an Internally threaded end without a shoulder, and for an externally threaded end, shall be from one turn small to one turn large.
10.3 Design of Threaded Ends
The wrenching section of internally threaded ends shall be polygonal, and the wrenching section of externally threaded ends shall be furnished with either polygon or flats, at the manufacturer’s option.ASME B16.50 pdf download.
