ASME B16.22-2018 pdf – Wrought Copper and Copper Alloy Solder-Joint Pressure Fittings
ASME B16.22-2018 pdf – Wrought Copper and Copper Alloy Solder-Joint Pressure Fittings.
out-of-roundness: maximum measured diameter minus minimum measured diameter,
ovolity: elliptical condition associated with out-of- roundness,
Each fitting shall be permanently marked with the manutacturers name or trademark in accordance with MSS SP.25. Marking on fittings smaller than size 1/2 or on any fitting where Il damages soldering surlaces is not required.
(a) Fittings shall be madefrorn copper UNS No. C10200,
C120G0, or C12200 or copper alloy [INS No. C23000, for
which allowable stresses are found in ASMF. R31.1, ASME
WI 1.9 orASME Boilerand Pressure Vessel Code. Section II.
(b) Other coppers and copper alloys are permitted. provided they meet the chemical requirements of 84% minimum copper and 16% maximum zinc and provided the liltings produced from the copper alloy meet all the mechanical and corrosion-resistant properties for the end purposes of the fittings. For potable water applications. Fittings shall be produced from Iowlead (0.25% or less) copper alloys and shall meet all tile mechanical and corrosion-resistant properties for the end purposes of the fittings. The composition of the copper alloy shall contain nothing that will inhibit joining to the tube or to other fittings.
7 LAYING LENGTHS
Due to widely varying manufacturing processes, meaningtul laying length requirements of fittings cannot he established. Consult the manufacturer for these dimensions.
8 TUBE STOPS
Except for repair couplings, fittings shall be manufactured with a tube stop. Repair couplings shall not require a tube stop. The tube stop shall control loint length, even with an external (FTG) end having the minimum outside diameter shown in Table 126.96.36.199. Examples of various tube stop configurations are shown In Figure 8-1.
9 INSPECTION TOLERANCE
For determining conformance with this Standard, the convention for fixing significant digits where limits (maximum or minimum values) are specified shall be as defined in ASTM E29. This requires that an observed orcalculated 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.
9.2 Linear Dimensions
An inspection tolerance, as shown in Table 9.2-1, shall be allowed on center-to-shoulder, center-to-center, center-to-threaded-end, and shoulder-to-threaded-end dimensions on all fittings having internal (C) solder ends, as well as on center-to-solder-end and solder- end-to-threaded-end dimensions on all fittings having external (FTG) solder ends.
Coupling inspection limits for shoulder-to-shoulder and shoulder-to-end dimensions shall be double those shown in Table 9.2-1, except that the minus tolerance applied to dimension L (see Figure 4.1-1) shall not result in a dimension smaller than 1.5 mm (0.06 in).
The largest opening in the fitting shall govern the tolerance to be applied to all openings.
9.3 OvaLity of Fitting End (C or FTG)
Maximum ovality of the fitting solder-joint end shall not exceed 1% of the maximum diameters shown in Table 3L1-1. The average of the maximum and minimum diameters shall be within the dimensions shown in the Table.
9.4 InsIde Diameter or 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 3.1.1-1. The out-of-roundness condition of the cross-sectional area shall not exceed the value shown in Table 311-1.
For reducer or adapter fittings, the smallest end diameter shall apply, provided that this diameter does not restrict the other outlets
95 WaLt Thickness
The minimum wall thickness shall not be less than that shown In Table 3.11-1.
10 THREADED ENDS
Fitting threads shall be right-lund, conforming to ASM F Bi 20 1. They shall be taper threads (NFl).