ASME B16.51-2013 pdf download
ASME B16.51-2013 pdf download.Copper and Copper Alloy Press-Connect Pressure Fittings.
6 MATERIAL 6.1 ð18Þ Wrought Copper Alloys (a) Fittings shall be made from copper alloy UNS No. C10200, C12000, C12200, or C23000. (b) Othercoppers andcopperalloys shallbepermitted, provided theirchemical composition contains a minimum of84% copper and a maximum of16% 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 not inhibit joining to the tube or to other fittings. 6.2 Cast Copper Alloys (a) Castings intended for use in applications up to 204°C (400°F) shall be ofa copper alloyproduced to meet (1) the requirements ofASTM B62 UNS No. C83600, or (2) the chemical and tensile requirements of ASTM B584 UNS No. C83800 orC84400 and in all other respects the requirements of ASTM B62 (b) Castings intended for use in potable water applica- tions up to 93°C (200°F) shall be low lead (0.25% or less) and shall be (1) of a copper alloy produced to meet the require- ments of ASTM B584 UNS No. C87850 or C89833, or (2) ofother cast copper alloys, provided the fittings produced meet mechanical and corrosion-resistant prop- erties needed for potable water application 6.3 ð18Þ Elastomers (Seals) Elastomeric components shall be resistantto microbio- logicalattackandozoneattackandshallcontaininhibitors to prevent copper degradation. The elastomer shall be an ethylene propylene diene monomer (EPDM) and shall meet the minimum property and test requirements as defined by ASTM D2000, shown in the following table: Material EPDM Minimum durometer hardness, Shore A 55 points Minimum tensile strength, MPa (psi) 10 (1,450) Heat resistance A25 Compression set B35 Water resistance EA14 Low-temperature resistance F17 Tear resistance G21 Special requirements Z1, Z2, Z3, Z4 The special requirements shall be as follows: (a) Z1 designates compliance with NSF/ANSI 61. (b) Z2 designates the compression set. The maximum compression setshall be 45% when compressed 2.62 mm (0.103 in.), 40% when compressed 3.53 mm (0.139 in.), and 35% when compressed 5.33 mm (0.210 in.). (c) Z3 designates chloramine resistance, which is determined by testing for 1 008 h at 70°C (158°F) in a solution containing 50 ppm total chlorine, per ASTM D6284; this shall be checked and refreshed daily. Upon completion of the test, the change in volume shall be less than 30%, and the change in durometer hardness shall be a maximum of6. There shall be no visual degrada- tion of the elastomeric material. (d) Z4 designates resistance ofthe elastomer to copper degradation. The test shall be conducted in accordance with para. 14.9.1. Upon completion of the test, the change in volume shall be less than 30%, and the change in durometer hardness shall be a maximum of 6. There shall be no visual degradation ofthe elastomeric material. 6.4 Seal Lubricant The only seal lubricant that shall be used is that speci- fied by the manufacturer. 7 LAYING LENGTHS Due to widely varying manufacturing processes, mean- ingful laying length requirements of fittings cannot be established. Consult the manufacturer for these dimensions. 8 TUBE STOPS Except for repair couplings, fittings shall be manufac- tured with a tube stop (abutment) to limit tube insertion. Repair couplings shall not require a tube stop. The tube stop shall control jointlength, evenwith anexternal (FTG) endhavingtheminimumoutside diametershowninTable 9.1-1. Examples of various tube stop configurations are shown in Figure 8-1. 9 DESIGN 9.1 General As aminimum, thefittingshall bedesignedto withstand the tests specified in section 14 without leakage. The press-connect ends shall be assembled in accordance with the fitting manufacturer’s installation instructions. The dimensions and tolerances of the press-connect ends shall be as shown in Table 9.1-1.
9.2 Out-of-Roundness of Fitting End (P or FTG) Maximum out-of-roundness ofthe press-connectfitting ends, dimensions A and F, shall not exceed 1% of the maximum corresponding diameters shown in Table 9.1-1. The average of the maximum and minimum diameters shall be within the dimensions shown in Table 9.1-1. 9.3 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 9.1-1. The out-of-roundness condition of the cross-sectional area shall not exceed 10% of the minimum diameter shown in Table 9.1-1. For reducer or adapter fittings, the smallest end diameter shall apply, provided that this diameter does not restrict the other outlets. 9.4 Wall Thickness Theminimumwallthicknesstakenatanylocationofthe fitting shall not be less than shown in Table 9.1-1.
