ASME B16.22:2021 pdf free download

ASME B16.22:2021 pdf free download Wrought Copper and Copper Alloy Solder-Joint Pressure Fittings
4.3 Definitions out-of-roundness: maximum measured diameter minus minimum measured diameter. ovality: elliptical condition associated with out-of-round- ness.
5 MARKING Each fitting shall be permanently marked with the manufacturer’s name or trademark in accordance with MSS SP-25. Marking on fittings smaller than size 1 ∕ 2 or on any fitting where it damages soldering surfaces is not required.
6 MATERIAL
(a) FittingsshallbemadefromcopperUNSNo.C10200, C12000, or C12200 or copper alloy UNS No. C23000, for which allowable stresses are found in ASME B31.1, ASME B31.9,orASMEBoilerandPressureVesselCode,SectionII, Part D.
(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 fittings produced from the copper alloy meet all the mechanical andcorrosion-resistantproperties forthe end purposes of the fittings. For potable water applications, fittings shall be produced from low-lead (0.25% or less) copper alloys and shall meet all the 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, mean- ingful laying length requirements of fittings cannot be established. Consult the manufacturer for these dimen- sions.
8 TUBE STOPS Except for repair couplings, fittings shall be manufac- turedwithatubestop. Repaircouplings shallnotrequirea tube stop. The tube stop shall control joint length, even with an external (FTG) end having the minimum outside diametershowninTable3.1.1-1. Examplesofvarioustube stop configurations are shown in Figure 8-1.
9 INSPECTION TOLERANCE
9.1 Convention 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 orcalculatedvalueberoundedofftothenearestunitinthe lastright-hand digitused forexpressingthe limit. Decimal values and tolerances do notimplya 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 solderend-to-threaded-end dimensions on all fittings having external (FTG) solder ends. Couplinginspectionlimitsforshoulder-to-shoulderand 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 notresultin a dimen- sion smaller than 1.5 mm (0.06 in.).
The largestopening in the fitting shall govern the toler- ance to be applied to all openings.
9.3 Ovality of Fitting End (C or FTG) Maximum ovalityofthe fittingsolder-jointend shall not exceed 1% of the maximum diameters shown in Table 3.1.1-1. The average of the maximum 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 O in Table 3.1.1-1. The out-of-roundness condition ofthe cross-sectional area shall not exceed the value shown in Table 3.1.1-1. For reducer or adapter fittings, the smallest end diameter shall apply, provided that this diameter does not restrict the other outlets.