ASME B16.51 pdf free download

ASME B16.51 pdf free download Copper and Copper Alloy Press-Connect Pressure Fittings
5 MARKING Each fitting shall be permanently marked with the manufacturer’s name or trademark in accordance with MSS SP-25. Marking on fittings less than nominal size 1 ⁄ 2 or on any fitting where it damages joining surfaces is not required.
6 MATERIAL
6.1 Wrought Copper Alloys (a) Fittings shall be made from copper UNS alloy number C10200, C12000, C12200, or C23000. (b) Other coppers and copper alloys shall be permit- ted provided their chemical composition contains a min- imum of 84% copper and a maximum of 16% zinc and provided the fittings produced from the copper alloy meet all the mechanical and corrosion-resistant proper- ties for the end purposes ofthe fittings. The composition of the copper alloy shall not inhibit joining to the tube or to other fittings.
6.2 Cast Copper Alloys Castings shall be copper alloys produced to meet either of the following: (a) the requirements of ASTM B62 Alloy C83600 (b) the chemical composition and tensile require- ments of ASTM B584 Alloy C83800 or C84400 and in all other respects the requirements of ASTM B62
6.3 Elastomers (Seals) Elastomeric components shall be resistantto microbio- logical attack and ozone attack, and shall contain inhibi- tors to prevent copper degradation. The elastomer shall be an ethylene propylene diene monomer (EPDM) and shall meetthe minimum property and testrequirements, as defined by ASTM D2000, shown in the following table:
(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 that is deter- mined by testing for 1 008 h at 70°C (158°F) per ASTM D6284 a solution containing 50 ppm total chlo- rine; 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 of 6. There shall be no visual degra- dation of the elastomeric material. (d) Z4 designatesresistance ofthe elastomerto copper degradation. The test shall be conducted in accordance with para. 14.9.1 of this Standard. Upon completion of the test, the change in volume shall be less than 30%, and the change in durometer hardness shall be a maxi- mum of 6. There shall be no visual degradation of the 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, meaningful laying length requirements offittings cannot be established. Consult the manufacturer for these dimensions.
8 TUBE STOPS Except for repair couplings, fittings shall be manufactured with a tube stop (abutment) to limit tube insertion. Repair couplings shall not require a tube stop. The tube stop shall control joint length, even with an external (FTG) end havingthe minimumoutside diametershown in Table 1 (Table I-1). Examples of various tube stop configurations are shown in Fig. 2.
9 DESIGN
9.1 General As a minimum, the fitting shall be designed to with- stand the tests specified in section 14 without leakage. The press-connectends shallbe assembled inaccordance with the fitting manufacturer’s installation instructions. The dimensions and tolerances ofthe press-connectends shall be as shown in Table 1 (Table I-1).
9.2 Out-of-Roundness of Fitting End (P or FTG) Maximum out-of-roundness of the press-connect fit- ting ends, dimensions A and F, shall notexceed 1% ofthe maximum corresponding diameters shown in Table 1 (Table I-1). The average of the maximum and minimum diameters shall be within the dimensions shown in Table 1 (Table I-1).
9.3 Inside Diameter of Fitting Theminimumcross-sectionalareaoftheinside diame- ter through the fitting body shall not be less than the theoretical minimum area defined by diameter O in Table 1 (Table I-1). The out-of-roundness condition of the cross-sectional area shall not exceed 10% of the mini- mum diameter shown in Table 1 (Table I-1). For reducer or adapter fittings, the smallest end diam- eter shall apply, provided that this diameter does not restrict the other outlets.
9.4 Wall Thickness The minimum wall thickness taken at any location of the fitting shall not be less than shown in Table 1 (Table I-1).