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ASME B16.51-2018 pdf download

ASME B16.51-2018 pdf download.Copper and Copper Alloy Press-Connect Pressure Fittings.
1 ð18Þ SCOPE This Standard establishes requirements for castcopper alloy, wrought copper, and wrought copper alloy press- connect pressure fittings for use with hard-drawn seam- lesscopperwatertubeconformingtoASTM B88 forpiping systems conveying water. The press-connect system (tube, fitting, and joint) conforming to this Standard is for use at a maximum pressure of 1 380 kPa (200 psi) over the temperature range from 0°C to 93°C (32°F to 200°F). This Standard provides requirements for fittings suitable for press-connect joining and covers the following: (a) terminology (b) size designations (c) marking (d) material (e) dimensions and tolerances (f) required installation instructions (g) pressure–temperature ratings (h) design qualification 2 GENERAL 2.1 Convention For determining conformance with this Standard, the convention for fixing significant digits where limits (maximum and 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 notimply a particular method of measurement. 2.2 Relevant Units This Standard states values in both SI (metric) and U.S. Customary units. These systems of units are to be regarded separately as standard. Within the text, the U.S. Customary units are shown in parentheses. The values stated in each system are not exact equivalents; therefore, it is required that each system of units be used independently of the other. Combining values from the two systems constitutes nonconformance with the Standard. 2.3 References Codes, standards, and specifications containing provi- sions to the extent referenced herein constitute require- ments of this Standard. These referenced documents are listed in Mandatory Appendix I. 2.4 Quality Systems Requirements relating to the product manufacturer’s Qual i ty S ys te m P ro gram are d e s cri b e d i n Nonmandatory Appendix A. 3 TERMINOLOGY 3.1 Abbreviations The following abbreviations are used to designate the type of fitting end as shown in Figure 3.1-1: F = internal ASME B1.20.1 taper pipe-thread end (NPTI) FTG = solder-joint fitting end made to copper tube outside diameter M = external ASME B1.20.1 taper pipe-thread end (NPTE) P = internal press-connect joint end made to receive copper tube diameter 3.2 Definitions This paragraph defines the terms used in this Standard. joining, press-connect: the act ofjoining a fitting or piping component to a tube by use of a tool that mechanically compresses the wall of the fitting end over the tubing, encasinganelastomericsealbetweenthematingsurfaces. out-of-roundness: the maximum measured diameter minus the minimum measured diameter. press-connect fitting: a type of piping component (e.g., coupling, tee, elbow) used to connect tubing or other accessories by mechanically compressing the wall of thefittingendoverthetube, usinganelastomericmaterial to provide a seal between the inside surface ofthe fitting and the outside surface of the tube. 4 SIZE The size designations ofthe fittings shown in the tables ofthis Standard correspond to standard water tube sizes as shown in ASTM B88. The size designations of the threaded ends correspond to nominal pipe sizes as shown in ASME B1.20.1. Fittingsshallbedesignatedbythesizeoftheopeningsin the sequence illustrated in Figure 3.1-1. 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 oronanyfittingwhereitdamagesjoiningsurfacesisnot required. 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

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