1、AN AMERICAN NATIONAL STANDARD ASME B16.50-2013Revision of ASME B16.50-2001 (R2008)Wrought Copper and Copper Alloy Braze-Joint Pressure FittingsASME B16.50-2013Revision of ASME B16.50-2001 (R2008)Wrought Copperand Copper AlloyBraze-JointPressure FittingsAN AMERICAN NATIONAL STANDARDTwo Park Avenue Ne
2、w York, NY 10016 USADate of Issuance: August 6, 2013The next edition of this Standard is scheduled for publication in 2018.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard. Interpretations are published on the ASME Web site under the Committee
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4、e date posted.The Committee Pages can be found at http:/cstools.asme.org/. There is an option available toautomatically receive an e-mail notification when errata are posted to a particular code or standard.This option can be found on the appropriate Committee Page after selecting “Errata” in the “P
5、ublicationInformation” section.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American NationalStandards. The Standards Committee that approved the code or standard was balan
6、ced to assure that individuals fromcompetent and concerned interests have had an opportunity to participate. The proposed code or standard was madeavailable for public review and comment that provides an opportunity for additional public input from industry, academia,regulatory agencies, and the pub
7、lic-at-large.ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device, or activity.ASME does not take any position with respect to the validity of any patent rights asserted in connection with anyitems mentioned in this document, and does not undertake to insure anyon
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10、blishedASME procedures and policies, which precludes the issuance of interpretations by individuals.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical Engineers
11、Two Park Avenue, New York, NY 10016-5990Copyright 2013 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword ivCommittee Roster . vCorrespondence With the B16 Committee viSummary of Changes vii1 Scope . 12 General . 13 PressureTemperature Ratings 14 Termi
12、nology . 15 Marking . 56 Material . 57 Laying Lengths 58 Tube Stops 59 Inspection Tolerance . 510 Threaded Ends. 511 Alignment . 812 Gaging 8Figures1 Method of Designating Laying Lengths of Fittings andOpenings of Reducing Fittings 32 Tube Stops . 63 Alignment 8Tables1 Internal PressureTemperature R
13、atings for Copper Fittings, kPa 22 Inspection Tolerance 63 Dimensions of Braze-Joint Ends . 7Mandatory AppendicesI U.S. Customary Equivalents . 9II References 12Nonmandatory AppendicesA Fitting Rating 13B Quality System Program 14iiiFOREWORDIn 1994, the ASME B16 Standards Committee authorized Subcom
14、mittee J Standardization todevelop a standard for wrought copper and copper alloy braze-joint pressure fittings. Thesefittings are intended for use with seamless copper tube conforming to the American NationalStandardsInstitute(ASTM)StandardSpecifications,B88(WaterandGeneralPlumbingSystems),B280(Air
15、 Conditioning and Refrigeration Service), and B819 (Medical Gas Systems). Following approvalby the Standards Committee and ASME, this Standard was approved as an American NationalStandard on October 11, 2001, with the new designation ASME B16.50-2001.In this 2013 Edition, references to ASME standard
16、s were revised to no longer list specific editionyears; the latest edition of ASME publication applies, unless stated otherwise. Also in this Edition,Tables 3 and I-3 now include a maximum cup length under the column heading shown as“Depth, G.” Following approval by the B16 Standards Committee and t
17、he ASME SupervisoryBoard, and after public review, this Standard was approved as an American National Standardby ANSI on May 28, 2013.Requests for interpretation or suggestions for revision should be sent to the Secretary,B16 Standards Committee, The American Society of Mechanical Engineers, Two Par
18、k Avenue,New York, NY 10016-5990.ivASME B16 COMMITTEEStandardization of Valves, Flanges, Fittings, and Gaskets(The following is the roster of the Committee at the time of approval of this Standard.)STANDARDS COMMITTEE OFFICERSW. B. Bedesem, ChairG. A. Jolly, Vice ChairC. E. OBrien, SecretarySTANDARD
19、S COMMITTEE PERSONNELA. Appleton, Alloy Stainless Products Co., Inc.R. W. Barnes, ANRIC Enterprises, Inc.W. B. Bedesem, ConsultantR. M. Bojarczuk, ExxonMobil Research however, they shouldnot contain proprietary names or information.Requests that are not in this format will be rewritten in this forma
20、t by the Committee priorto being answered, which may inadvertently change the intent of the original request.ASME procedures provide for reconsideration of any interpretation when or if additionalinformation that might affect an interpretation is available. Further, persons aggrieved by aninterpreta
21、tion may appeal to the cognizant ASME Committee or Subcommittee. ASME does not“approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity.Attending Committee Meetings. The B16 Standards Committee regularly holds meetings, whichare open to the public. Persons wi
22、shing to attend any meeting should contact the Secretary ofthe B16 Standards Committee.viASME B16.50-2013SUMMARY OF CHANGESFollowing approval by the B16 Committee and ASME, and after public review, ASME B16.50-2013was approved by the American National Standards Institute on May 28, 2013.ASME B16.50-
23、2013 consists of editorial changes, revisions, and corrections identified by a marginnote, (13), placed next to the affected area.Page Location Change1 1 (1) “General” section moved to section 2,and remaining paragraphsrenumbered(2) Paragraph 1.2 deleted3 Revised in its entirety2 Table 1 Title, Gene
24、ral Notes, and Note (1) revised5 9.1 Revised7 Table 3 Eighth column added8 12.2 Second paragraph designation revised10 Table I-1 Title, General Notes, and Note (1) revised11 Table I-3 Eighth column added12 Mandatory Appendix II Updated13 Nonmandatory RevisedAppendix AviiINTENTIONALLY LEFT BLANKviii(
25、13)ASME B16.50-2013WROUGHT COPPER AND COPPER ALLOY BRAZE-JOINTPRESSURE FITTINGS1 SCOPEThis Standard establishes requirements for wroughtcopper and wrought copper alloy braze-joint seamlessfittings designed for use with seamless copper tube con-forming to ASTM Standard Specification, B88 (Waterand Ge
26、neral Plumbing Systems), B280 (Air Conditioningand Refrigeration Service), and B819 (Medical GasSystems).This Standard covers joints assembled with brazingmaterials conforming to ANSI/AWS A5.8.This Standard is allied to ASME standards B16.18 andB16.22. It provides requirements for fitting-ends suita
27、blefor brazing. This Standard covers(a) pressuretemperature ratings(b) abbreviations for end connections(c) size and method of designating openings offittings(d) marking(e) material(f) dimensions and tolerances(g) testing2 GENERAL2.1 Units of MeasureThis Standard states values in both SI (Metric) an
28、dU.S. Customary units. These systems of units are to beregarded separately as standard. Within the text, theU.S. Customary units are shown in parentheses or inseparate tables that appear in Mandatory Appendix I.The values stated in each system are not exact equiva-lents; therefore, it is required th
29、at each system of unitsbe used independently of the other. Combining valuesfrom the two systems constitutes nonconformance withthe Standard.2.2 ReferencesStandards and specifications adopted by reference inthis Standard are shown in Mandatory Appendix II,which is part of this Standard. It is not con
30、sidered practi-cal to identify the specific edition of each standard andspecification in the individual references. Instead, thespecific edition reference is identified in MandatoryAppendix II.12.3 Quality SystemsRequirements relating to the product manufacturersQuality System Programs are described
31、 inNonmandatory Appendix B.3 PRESSURETEMPERATURE RATINGS3.1 Rating of SystemThe internal pressuretemperature rating for a braze-joint system is dependent upon not only fitting and tubestrength but also selection of valves and appurtenances.Pressuretemperature ratings for fittings and brazejoints to
32、the dimensions of Table 3 (Table I-3), made withtypical commercial brazing materials, shall be consid-ered equal to the values given in Table 1 (Table I-1).The internal pressuretemperature rating of the sys-tem shall be the lowest of the values shown in Table 1(Table I-1) and those of the tube, valv
33、es, orappurtenances.3.2 Fitting Bursting StrengthFittings manufactured to this Standard shall have anambienttemperature bursting strength of at least fourtimes the 38C (100F) internal pressure rating as shownin Table 1 (Table I-1).4 TERMINOLOGY4.1 SizeThe size of the fittings shown in Tables 3 and I
34、-3corresponds to standard water tube size as shown inASTM B88. The size of the threaded ends correspondsto nominal pipe size as shown in ASME B1.20.1.Fittings are designated by the size of the openings inthe sequence illustrated in Fig. 1.4.2 AbbreviationsThe following symbols are used to designate
35、the typeof fitting end:C p braze-joint fitting end made to receive coppertube diameter (female)F p internal ANSI standard taper pipe-threadend (female) NPTIFTG p braze-joint fitting end made to copper tubediameter (male)M p external ANSI standard taper pipe-threadend (male) NPTE(13)(13)ASME B16.50-2
36、013Table 1 Internal PressureTemperature Ratings for Copper Fittings, kPaStandard WaterTube SizeNote (1) 29C to 38C 66C 93C 121C 149C 177C 204C18Note (2) 9 690 8 240 7 750 7 750 7 590 6 460 4 840316Note (3) 7 630 6 490 6 110 6 110 5 980 5 090 3 810146 280 5 340 5 020 5 020 4 920 4 190 3 140385 360 4
37、560 4 290 4 290 4 200 3 570 2 680124 970 4 220 3 980 3 980 3 890 3 310 2 480584 350 3 700 3 480 3 480 3 410 2 900 2 170344 010 3 410 3 210 3 210 3 140 2 670 2 0001 3 400 2 890 2 720 2 720 2 660 2 270 1 7001143 020 2 570 2 420 2 420 2 370 2 010 1 5101122 810 2 390 2 250 2 250 2 200 1 870 1 4002 2 500
38、 2 130 2 000 2 000 1 960 1 670 1 2502122 310 1 960 1 850 1 850 1 810 1 540 1 1503 2 180 1 850 1 740 1 740 1 710 1 450 1 0903122 090 1 770 1 670 1 670 1 630 1 390 1 0404 2 020 1 710 1 610 1 610 1 580 1 340 1 0105 1 850 1 570 1 480 1 480 1 450 1 230 9206 1 720 1 460 1 380 1 380 1 350 1 150 8608 1 860
39、1 580 1 490 1 490 1 460 1 240 930GENERAL NOTES:(a) The fitting pressuretemperature rating applies to the largest opening of the fitting.(b) The fitting pressuretemperature rating is calculated, as shown in Nonmandatory Appendix A, then rounded down to the nearest unitof 10.NOTES:(1) For size designa
40、tion of fittings, see para. 4.1.(2)18nominal size is14O.D. seamless copper tube for refrigeration service, etc., as listed in ASTM B280.(3)316nominal size is516O.D. seamless copper tube for refrigeration service, etc., as listed in ASTM B280.2ASME B16.50-2013Fig. 1 Method of Designating Laying Lengt
41、hs of Fittings and Openings of Reducing FittingsC H11003 F2A1FTG H11003 CExtended2A1FTG H11003 F2 2B1 1AC H11003 MADAPTERSBUSHINGSCOUPLINGSCOUPLINGS45-deg-deg ELBOWSCAPS PLUGS21BFTG H11003 MFTG H11003 CFlushFTG H11003 FFlush2BC1B21C H11003 CRoll StopC H11003 CReducingLC2121C H11003 CStaked StopL21C
42、H11003 CNo StopB21C H11003 CEccentricCB2121CHFTGHFTG H11003 FTGBBCGENERAL NOTES:(a) Fittings are designated by size in the order: 1 x 2 x 3.(b) Fitting designs and drawings are illustrative only.12FTG H11003 CCC12C H11003 C3ASME B16.50-2013Fig. 1 Method of Designating Laying Lengths of Fittings and
43、Openings of Reducing Fittings (Contd)C H11003 C FTG H11003 C2CDB190-deg -deg ELBOWS SHORT RADIUS2CD1132222C1FTG H11003 FTG C H11003 FC H11003 MC H11003 C FTG H11003 C90-deg-deg ELBOWS LONG RADIUSFTG H11003 FTGC H11003 C H11003 CC H11003 FTG H11003 CTEESC H11003 CC H11003 CRETURN BENDSSUCTION LINE P-
44、TRAPSC H11003 C H11003 FBBCE11CECFGJE2BC12BB1123CFB1 23EGFCDJK214(13)ASME B16.50-20134.3 Definitionsout-of-roundness: the maximum measured diameterminus minimum measured diameter.ovality: the elliptical condition associated with out-of-roundness.5 MARKINGEach fitting shall be permanently marked with
45、 themanufacturers name or trademark in accordance withMSS SP-25 and the letters “BZ” in uppercase. Markingon fittings less than size12or on any fitting where itdamages the brazing surfaces is not required.6 MATERIAL(a) Fittings shall be made from copperUNS Nos. C10200, C12000, or C12200 or copper al
46、loyUNS C23000, for which allowable stresses are found inASME B31.1, ASME B31.9, or ASME Boiler and PressureVessel Code, Section II, Materials.(b) Other coppers and copper alloys are permittedprovided they meet the chemical requirements of84% minimum copper and 16% maximum zinc and pro-vided the fitt
47、ings produced from the copper alloy meetsall the mechanical and corrosion-resistant properties forthe end purposes of the fittings. The composition ofthe copper alloys shall contain nothing that will inhibitjoining to the tube or to other fittings.7 LAYING LENGTHSDue to widely varying manufacturing
48、processes,meaningful laying length requirements of fittings cannotbe established. Consult the manufacturer for thesedimensions.8 TUBE STOPSExcept for repair couplings, fittings shall be manufac-tured with a tube stop. Repair couplings shall not requirea tube stop. The tube stop shall control joint l
49、ength, evenwith an external (FTG) end having the minimum outsidediameter shown in Table 3 (Table I-3). Examples of vari-ous tube stop configurations are shown in Fig. 2.9 INSPECTION TOLERANCE9.1 ConventionFor determining conformance with this Standard, theconvention for fixing significant digits where limits(maximum and minimum values) are specified shall beas defined in ASTM E29. This requires that an observedor calculated value be rounded off to the nearest unitin the last right-hand digit used for expressing the limit.5Decimal
