ASME B16.50:2018 pdf free download

ASME B16.50:2018 pdf free download.Wrought Copper and Copper Alloy Braze-Joint Pressure Fittings.
5 MARKING
Each fitting shall be permanently marked with the manufacturer’s name or trademark in accordance with MSS SP-25 and the letters “BZ” in uppercase. Marking on fittings less than size or on any fitting where It would damage the brazing surfaces Is not required.
6 MATERIAL
(a) Fittings shall be made from copper UNS No. Cl 0200, CI 2000, or C12200 or copper alloy UNS No. C23000, for which allowable stresses are found in ASME 831.1, ASME B31.9, orASME Boiler and Pressure Vessel Code, Section Il, Part D.
(b) Other coppers and copper alloys are permitted. provided
(1) they meet the chemical requirements of 84% minimum copper and 16% maximum zinc
(2) the fittings produced from the copper alloy meet all the mechanical arid carrusiun-resistant properties for the end purposes of the fittings
The composition of the copper alloys shall contain nothing that will inhibit joining to the tube or to other fittings.
7 LAYING LENGTHS
flue to widely varying nianulaciuring processes. meaningful laying length requirements of fittings cannot be established. Consult the manulacturer for these dimensions.
8 TUBE STOPS
Except for repair couplings, fittings shall be manulac. tured with a tube stop, Repair couplings shall not require a tube stop. The tubc stop shall control joint length, even with an external (FTG) end having the minimum outside diameter shown In Table 3.1-1. Examples of various tube stop coniiguratlons are shown In Figure 8-1.
9 INSPECTION TOLERANCE
9.1 ConventIon
For determining conlormance with this Standard, the convention for fixing significant digits where limits (maximum and minimum values) arc specified shall be as defined in ASTM E29. This requires that an observed or calculated value be rounded off to the nearest unit in the last right-hand digit used for expressing the limit
Decimal values and tolerances do not Imply a particular method of measurement.
9.4 Inside Diameter of Fitting
The minimum cross-sectional area of the insidediameter through the fitting body shall not be lessthan the theoretical minimum area defined by diameter0in Table 3.1-1.The out-of-roundness condition of thecross-sectional area shall not exceed the value shownin Table 3.1-1.
For reducer or adapter fittings. the smallest enddiameter shall apply. provided that this diameter doesnot restrict the other outlets.
9.5 Wall Thickness
The minimum wall thickness shall not be less thanshown in Table 3.1-1.
10 THREADED ENDS
Fitting threads shall be right-hand, conforming to ASMEB1.20.1. They shall be taper threads (NPT).
10.1 Countersink or Chamfer
All internal threads shall be countersunk a distance noless than one-half the pitch of the thread, at an angle ofapproximately 45 deg with the axis of the thread. Allexternal threads shall be chamfered at an angle of 30deg to 45 deg from the axis. Countersinking and cham-fering shall be concentric with the threads.
The length of threads shall be measured to include thecountersink or chamfer.