1、AN AMERICAN NATIONAL STANDARD ASME B16.26-2013(Revision of ASME B16.26-2011)Cast Copper Alloy Fittings for Flared Copper TubesASME B16.26-2013(Revision of ASME B16.26-2011)Cast Copper AlloyFittings for FlaredCopper TubesAN AMERICAN NATIONAL STANDARDTwo Park Avenue New York, NY 10016 USADate of Issua
2、nce: September 12, 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. Periodically certain actions of the ASME B16 Committee may be published as Cases.Cases and interpret
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11、 of the publisher.The American Society of Mechanical EngineersTwo Park Avenue, New York, NY 10016-5990Copyright 2013 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword ivCommittee Roster . viCorrespondence With the B16 Committee viiSummary of Changes v
12、iii1 Scope . 12 General . 13 Pressure Rating 14 Size. 15 Marking . 16 Material . 17 Dimensions 18 Threading . 29 Hydrostatic Test . 2Tables1 General Dimensions Cast Copper Alloy Fittings for Flared Copper Tubes 32 Thread Specifications: External Threads on Fittings Class 2A 43 Thread Specifications:
13、 Internal Threads on Nuts Class 2B . 4Mandatory AppendicesI U.S. Customary Units . 5II References 7Nonmandatory AppendicesA Flared Tube Dimensions 8B Quality System Program 9iiiFOREWORDThe development of a standard for brass fittings for flared copper water tubes was initiatedby a subcommittee of th
14、e Copper Tube and Fitting Manufacturers Standardization Committeein 1929. When a general agreement had been reached, the draft of the proposed standard wassubmitted to Sectional Committee A40 on Minimum Requirements for Plumbing andStandardization of Plumbing Equipment, of the American Standards Ass
15、ociation (ASA). SectionalCommittee A40 was jointly sponsored by the American Society of Sanitary Engineering and TheAmerican Society of Mechanical Engineers (ASME).Final ASA approval and designation as an American Standard, ASA A40.2-1936, was grantedJanuary 20, 1936.The Standard remained unchanged
16、and without reaffirmation until 1955 when this activitywas transferred from Sectional Committee A40 to Sectional Committee B16 on Standardizationof Pipe Flanges and Fittings, under the sponsorship of ASME, the Mechanical ContractorsAssociation of America, Inc., and the Manufacturers Standardization
17、Society of the Valve andFittings Industry.Subcommittee No. 9 B16 on Solder-Joint Fittings was instructed to develop a revised standard.The revised draft of this Standard was submitted to industry for criticism and comment. Thefinal draft was approved by Sectional Committee B16 and its sponsors by le
18、tter ballot.ASA approval and designation as ASA B16.26-1958 was granted on February 12, 1958. Beginningin 1965, consideration was given to reviewing the Standard in light of progress made in theproduction of these fittings. Subcommittee No. 9 completed its work by recommending theupdating of referen
19、ced standards and thread specifications and including additional material.Following approval by the USA Standards Committee and Sponsors, the revision was approvedby the new USA Standards Institute on April 21, 1967.In 1982, American National Standards Committee B16 was reorganized as an ASME Commit
20、teeoperating under procedures accredited by the American National Standards Institute (ANSI). Inthe 1988 edition, metric units were omitted, and references to other standards were updated.Following approval by the B16 Main Committee and the ASME Supervisory Board, and afterpublic review, the Standar
21、d was approved as an American National Standard by ANSI onAugust 23, 1988.In the 2006 edition, metric units became the primary reference units while U.S. Customaryunits were maintained in either parenthetical or separate forms. SI values were positioned in themain text; U.S. Customary values were po
22、sitioned in Mandatory Appendix I. The Scope wasclarified, and a section on hydrostatic testing was added, along with a quality assurance recom-mendation in Nonmandatory Appendix B. Additional information concerning the design of thetube flare was also incorporated, in answer to user requests for suc
23、h information, and wasreported in Nonmandatory Appendix A. Following approval by the B16 Main Committee andthe ASME Supervisory Board, and after public review, the Standard was approved as an AmericanNational Standard by ANSI on May 23, 2006.In the 2011 edition, references to ASME standards were rev
24、ised to no longer list specificedition years; the latest edition of ASME publications applies unless stated otherwise. Materialsmanufactured to other editions of the referenced ASTM standards have been permitted to beused to manufacture fittings meeting the requirements of this Standard as long as t
25、he fittingmanufacturer verifies the material meets the requirements of the referenced edition. Followingapproval by the Standards Committee and the ASME Board on PTCS, the revision to the 2006edition was approved as an American National Standard by ANSI on August 9, 2011 with thenew designation ASME
26、 B16.26-2011.In this 2013 edition, provisions have been included to recognize low lead alloys to complywith the U.S. Safe Drinking Water Act, which will be effective January 2014. Following approvalby the ASME B16 Standards Committee, approval as an American National Standard was givenby ANSI on Jul
27、y 29, 2013, with the new designation ASME B16.26-2013.ivRequests for interpretations or suggestions for revisions should be sent to the Secretary,B16 Committee, The American Society of Mechanical Engineers, Two Park Avenue, New York,NY 10016-5990.vASME B16 COMMITTEEStandardization of Valves, Flanges
28、, 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, SecretarySTANDARDS COMMITTEE PERSONNELA. Appleton, Alloy Stainless Products Co., Inc.R. W. Barnes, ANRIC
29、 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 format by the Committee priorto being answered, which may inadvertently change the intent of
30、 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 aninterpretation may appeal to the cognizant ASME Committee or Subcommittee. ASME does not“approve,
31、” “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 wishing to attend any meeting should contact the Secretary ofthe B16 Standards Committee.
32、viiASME B16.26-2013SUMMARY OF CHANGESFollowing approval by the B16 Committee and ASME, and after public review, ASME B16.26-2013was approved by the American National Standards Institute on July 29, 2013.ASME B16.26-2013 consists of editorial changes, revisions, and corrections identified by a margin
33、note, (13), placed next to the affected area.Page Location Change1 6 Revised in its entiretyviiiASME B16.26-2013CAST COPPER ALLOY FITTINGS FOR FLARED COPPER TUBES1 SCOPEThis Standard establishes specifications for cast cop-per alloy fittings and nuts used with flared seamlesscopper tube conforming t
34、o ASTM B88 (water and gen-eral plumbing systems). Included are requirements forthe following:(a) pressure rating(b) size(c) marking(d) material(e) dimensions(f) threading(g) hydrostatic testing2 GENERAL2.1 ReferencesCodes, standards, and specifications containing provi-sions to the extent referenced
35、 herein constitute require-ments of this Standard. These reference documents arelisted in Mandatory Appendix II.2.2 ConventionFor determining conformance with this Standard, theconvention for fixing significant digits where limits(maximum and minimum values) are specified shall beas defined in ASTM
36、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.Decimal values and tolerances do not imply a particularmethod of measurement.2.3 Relevant UnitsThis Standard states values in both SI (Metric) andU.S. C
37、ustomary 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 that each
38、 system of unitsbe used independently of the other. Combining valuesfrom the two systems constitutes nonconformance withthe Standard.2.4 Quality SystemsRequirements relating to the product manufacturersquality system programs are described inNonmandatory Appendix B.12.5 Service ConditionsCriteria fo
39、r selection of materials suitable for particu-lar fluid service are not within the scope of this Standard.3 PRESSURE RATINGThe fittings covered by this Standard are designed fora maximum cold-water service pressure of1 200 kPa (175 psig).4 SIZEThe sizes of the fittings shown in Table 1 (Table I-1)co
40、rrespond to standard water tube size as defined inASTM B88.5 MARKINGEach fitting shall be marked with the manufacturersname or trademark and other applicable markings asrequired by MSS SP-25. Marking of fittings less thannominal size12is optional.6 MATERIAL(a) Castings intended for use in applicatio
41、ns up to400F (204C) shall be of a copper alloy produced to meet(1) the requirement of ASTM B62 Alloy C83600 or(2) the chemical and tensile requirements ofASTM B584 Alloy C83800 or C84400 and in all otherrespects comply with the requirements of ASTM B62(b) Castings intended for use in potable water a
42、ppli-cations, up to 200F (93C), shall be low lead (0.25% orless) and shall be(1) of a copper alloy produced to meet the require-ments of ASTM B584 Alloy C87850 or C89833 or(2) of other cast copper alloys, provided the fittingsproduced meet mechanical and corrosion-resistant prop-erties needed for po
43、table water application7 DIMENSIONS7.1 Fitting and NutThe dimensions and tolerances of fittings and nutsshall be as shown in Table 1 (Table I-1). Design of thesealing surfaces of the fitting and nut shall be at thediscretion of the manufacturer.(13)ASME B16.26-20137.2 Tube FlareDimensions relating t
44、o the flared end of the tube aredescribed in Nonmandatory Appendix A. SI units areshown in Table A-1, and U.S. Customary units are shownin Table A-2.8 THREADINGStraight threads shall conform to ASME B1.1 Class 2Aexternal and Class 2B internal. The dimensions of2straight threads are given in Tables 2
45、 and 3(Tables I-2 and I-3).Taper pipe threads (NPT) shall conform toANSI/ASME B1.20.1.9 HYDROSTATIC TESTHydrostatic testing is not required.ASME B16.26-2013Table 1 General Dimensions Cast Copper Alloy Fittings for Flared Copper TubesA H A T L B B B G C C D 45-deg elbowCorner of nut Corner of nut Dot
46、ted lines show90-deg elbowN E B Diameter Minimum Length of Minimum Diameter Minimum WidthStandard Outside of Fitting Minimum Center-to- Seat Metal of Bore Length of Across NumberWater Diameter Bore, B Center-to- Face of 45- Projection, Thickness, of Nut, N Bore in Flats of of FlatsTube Size of Tube
47、Note (1) Face, A deg Elbow, CL GNote (1) Nut, D Nut, E on Nut3812.7 9.62 36 27.0 6.5 2.4 13.1 5.0 27.4 61215.9 12.70 39 29.0 6.5 2.4 16.7 6.5 31.0 63422.2 19.05 45 32.0 7.0 2.5 23.0 9.5 37.6 61 28.6 25.40 53 37.5 7.5 2.8 29.4 12.5 48.4 611434.9 31.75 58 40.0 8.0 3.2 35.7 16.0 54.8 811241.3 38.10 65
48、44.0 8.5 3.3 42.1 19.0 65.1 82 54.0 50.80 78 52.0 9.5 4.0 54.8 25.5 82.9 10GENERAL NOTES:(a) All dimensions are in millimeters.(b) Nuts with 45-deg taper seat or convex curved seat are interchangeable on ball-joint fittings.NOTE:(1) Tolerance on diameter of bores through fitting and nut, all sizes,
49、0.12 mm.3ASME B16.26-2013Table 2 Thread Specifications: External Threads on Fittings Class 2AStandard Length MaximumMajor Diameter Pitch DiameterWater Thread of MinorTube Size Designation, H Thread, T Max. Min. Max. Min. Diameter387814 UNF 11.0 22.184 21.923 21.005 20.869 19.95912114 UNS 11.0 25.356 25.096 24.178 24.037 23.1313411414 UNS 12.5 31.709 31.448 30.530 30.394 29.484115812 UNS 14.0 41.229 40.940 39.855 39.706 38.66311417812 UN 15.5 47.579 47.290 46.205 46.053 44.98311221412 UN 17.5 57.104 56.815 55.730 55.576 54.508227812 UN 20.5
