1、AN AMERICAN NATIONAL STANDARD ASME B16.39-2014(Revision of ASME B16.39-2009)Malleable Iron Threaded Pipe UnionsClasses 150, 250, and 300ASME B16.39-2014(Revision of ASME B16.39-2009)Malleable IronThreaded PipeUnionsClasses 150, 250, and 300AN AMERICAN NATIONAL STANDARDTwo Park Avenue New York, NY 10
2、016 USADate of Issuance: October 15, 2014The next edition of this Standard is scheduled for publication in 2019.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard. Interpretations are published on the ASME Web site under the Committee Pages athtt
3、p:/cstools.asme.org/ as they are issued.Errata to codes and standards may be posted on the ASME Web site under the Committee Pages toprovide corrections to incorrectly published items, or to correct typographical or grammatical errorsin codes and standards. Such errata shall be used on the date post
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5、nformation” 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 balanced to assu
6、re 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 public-at-larg
7、e.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 anyone utilizing
8、 a standard against liability forinfringement of any applicable letters patent, nor assumes any such liability. Users of a code or standard are expresslyadvised that determination of the validity of any such patent rights, and the risk of infringement of such rights, isentirely their own responsibil
9、ity.Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted asgovernment or industry endorsement of this code or standard.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior w
10、ritten permission of the publisher.The American Society of Mechanical EngineersTwo Park Avenue, New York, NY 10016-5990Copyright 2014 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword ivCommittee Roster vCorrespondence With the B16 Committee . viSumma
11、ry of Changes vii1 Scope . 12 Design 13 PressureTemperature Ratings 24 Size . 25 Marking . 26 Materials 27 Joints and Seats . 28 Threading of Pipe Ends . 29 Hydrostatic Strength . 310 Tensile Strength . 311 Air Pressure Test . 312 Sampling for Air Pressure Test 313 Coatings 314 Dimensions 3Tables1 P
12、ressureTemperature Ratings . 22 Tensile Strength of Unions . 23 SI Dimensions of Class 150 Malleable Iron Threaded Unions 44 SI Dimensions of Class 250 Malleable Iron Threaded Unions 45 SI Dimensions of Class 300 Malleable Iron Threaded Unions 5Mandatory AppendicesI Dimensions and Pressure Ratings o
13、f Unions in U.S. Customary Units . 7II References 10Nonmandatory AppendixA Quality System Program . 11iiiFOREWORDIn 1921, the American Engineering Standards Committee, later the American StandardsAssociation (ASA), now the American National Standards Institute (ANSI), authorized the organi-zation of
14、 a Sectional Committee on the Standardization of Pipe Flanges and Flanged Fittings, withthe following organizations as joint sponsors: Heating, Piping, and Air Conditioning ContractorsNational Association, later the Mechanical Contractors Association of America (MCAA);Manufacturers Standardization S
15、ociety of the Valve and Fittings Industry (MSS); and theAmerican Society of Mechanical Engineers (ASME).Threaded fittings were added to the scope of the B16 Committee, and Subcommittee No. 2(now Subcommittee B) was made responsible for threaded fittings other than steel. Standardsfor cast and mallea
16、ble iron fittings were approved by ASA as early as 1927.For many years, the need for standardization of threaded malleable iron unions was met byFederal Specifications (published by the General Services Administration) and other documentspublished by the Association of American Railroads (AAR) and t
17、he Underwriters Laboratories(UL). As these standards continued to diverge, however, manufacturers concluded that a commonpractice would be desirable. Accordingly, beginning in 1967, MSS developed a standard practiceembodying features of the existing standards and published it as MSS SP-76-1970.Durin
18、g the next few years, ANSI recognition of the AAR and UL standards was withdrawnin favor of SP-76, and in 1975 MSS submitted its standards to Subcommittee B of AmericanNational Standards Committee B16 for consideration as an American National Standard. Afterseveral modifications and the addition of
19、metric equivalents, the Standard was approved by theCommittee, co-secretariat organizations, and ANSI. It was then published with the designationANSI B16.39-1977.In 1982 American National Standards Committee B16 was reorganized as an ASME Committeeoperating under procedures accredited by ANSI. The 1
20、986 edition of B16.39 updated the referencedstandards and specifications, established U.S. Customary units as the standard, and providedfor electrodeposition as an alternative to hot dipping for any application of zinc coating. Followingapproval by the Standards Committee and ASME, approval as an Am
21、erican National Standardwas given by ANSI on December 31, 1986, with the new designation ASME/ANSI B16.39-1986.In the 1998 edition of ASME B16.39, reference standards were updated, a quality systemprogram annex was added, and several editorial revisions were made. Following approval byASME B16 Subco
22、mmittee B and the B16 Standards Committee, ANSI approved thisAmerican National Standard on November 20, 1998.In the 2009 edition, metric units became the primary units in the body text and tables, withU.S. Customary units shown in parentheses or in separate tables or in an Appendix. The D min.values
23、 in Table 3 were replaced with the L2 values (external thread length) from ASME B1.20.2M-2006, Pipe Threads, 60 deg, General Purpose, and the D min. values in Table I-3 have been replacedwith the L2 values from ASME B1.20.1-1983, Pipe Threads, General Purpose (Inch).In this 2014 edition, section 8.2
24、 has been revised to standardize the verbiage for internal threadsand safety, and to harmonize language with other B16 Standards as it relates to defining threadlengths and gage points.Following approval by the ASME B16 Standards Committee, approval as an American NationalStandard was given by ANSI
25、on June 24, 2014, with the new designation ASME B16.39-2014.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 OFFICERSR. Bojarczuk, ChairC. E. Davila, Vice ChairC. E.
26、 OBrien, SecretarySTANDARDS COMMITTEE PERSONNELA. Appleton, Alloy Stainless Products Co., Inc.R. W. Barnes, Anric Enterprises, Inc.K. Barron, Ward ManufacturingW. B. Bedesem, ConsultantR. Bojarczuk, ExxonMobil Research however, they shouldnot contain proprietary names or information.Requests that ar
27、e not in this format will be rewritten in this format 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 a
28、vailable. Further, persons aggrieved by aninterpretation 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 hol
29、ds meetings thatare open to the public. Persons wishing to attend any meeting should contact the Secretary ofthe B16 Standards Committee.viASME B16.39-2014SUMMARY OF CHANGESFollowing approval by the B16 Committee and ASME, and after public review, ASME B16.39-2014was approved by the American Nationa
30、l Standards Institute on June 24, 2014.ASME B16.39-2014 includes editorial changes, revisions, and corrections, which are identified bya margin designator, (14), placed next to the affected area.Page Location Change2, 3 8.2 Revised4 Table 3 RevisedTable 4 Revised5 Table 5 Revised8 Table I-3 RevisedT
31、able I-4 Revised9 Table I-5 RevisedviiINTENTIONALLY LEFT BLANKviiiASME B16.39-2014MALLEABLE IRON THREADED PIPE UNIONSClasses 150, 250, and 3001 SCOPE1.1 GeneralThis Standard covers threaded malleable iron unions,Classes 150, 250, and 300. It also contains provisions forusing steel for NPS18unions. T
32、his Standard includes(a) design(b) pressuretemperature ratings(c) size(d) marking(e) materials(f) joints and seats(g) threads(h) hydrostatic strength(i) tensile strength(j) air pressure test(k) sampling(l) coatings(m) dimensionsMandatory Appendix I provides tables in U.S.Customary units.1.2 Referenc
33、esStandards and specifications adopted by reference inthis Standard are shown in Mandatory Appendix II,which is part of this Standard. It is not considered practi-cal to identify the specific edition of each referencedstandard and specification in the text, when referenced.Instead, the specific edit
34、ions of the referenced standardsand specifications are listed in Mandatory Appendix II.1.3 Quality SystemsNonmandatory requirements relating to the fittingmanufacturers quality system programs are describedin Nonmandatory Appendix A.1.4 Relevant UnitsThis Standard states values in both SI (Metric) a
35、ndU.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 t
36、hat each system of unitsbe used independently of the other. Combining values1from the two systems constitutes nonconformance withthe Standard.1.5 Service ConditionsCriteria for selection of materials suitable for particu-lar fluid service are not within the scope of this Standard.1.6 ConventionFor d
37、etermining 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 exp
38、ressing the limit.Decimal values and tolerances do not imply a particularmethod of measurement.1.7 Denotation1.7.1 Pressure Rating Designation. Class, followedby a dimensionless number, is the designation forpressuretemperature ratings as follows:Class 150 250 3001.7.2 Size. NPS, followed by a dimen
39、sionless num-ber, is the designation for nominal fitting size. NPS isrelated to the reference nominal diameter, DN, used ininternational standards. The relationship is, typically, asfollows:NPS DN1481215125114321124025021265384 1002 DESIGNThe complete union shall consist of a tail or male part,a hea
40、d or female part, and a union nut. The type of jointmay be ball-to-cone, ball-to-ball, or ball-and-socket withmetal-to-metal seating surfaces of iron, copper, or cop-per alloy. The threaded ends shall be male or femaleASME B16.39-2014Table 1 PressureTemperature RatingsPressure, barTemperature, Class
41、 150 Class 250 Class 300C Unions Unions Unions29 to 66 20.7 34.5 41.4100 17.5 30.6 37.5125 15.2 27.7 34.6150 12.9 24.8 31.7175 10.6 22.0 28.9200 8.2 19.1 26.0225 5.9 16.2 23.1232 5.2 . . . . . .250 . . . 13.4 20.3275 . . . 10.5 17.4288 . . . 9.0 15.9GENERAL NOTES:(a) 1 bar p 14.5 psi p 100 kPa(b) C
42、pF321.8pipe threads. The head or female part may be furnishedas a coupling, an elbow, or a tee.3 PRESSURETEMPERATURE RATINGS(a) Pressuretemperature ratings are shown in Table 1and Table I-1.(b) Unions with copper or copper alloy seats are notintended for use where temperature exceeds 232C(450F).(c)
43、All ratings are independent of the contained fluidand are the maximum pressures at the tabulated temper-atures. Intermediate ratings may be obtained by linearinterpolation between the temperatures shown.(d) The temperatures shown for the correspondingpressure rating shall be the material temperature
44、 of thepressure-retaining structure. It may be assumed that thematerial temperature is the same as the fluid tempera-ture. Use of a pressure rating at a material temperatureother than that of the contained fluid is the responsibilityof the user and subject to the requirements of any appli-cable code
45、.4 SIZE4.1 Nominal Pipe SizeAs applied in this Standard, the use of the phrase“nominal pipe size” or the designation NPS followedby a dimensionless number is for the purpose of identi-fying the end connection of unions. The number is notnecessarily the same as the fitting inside diameter.The connect
46、ing pipe dimension can be found inASME B36.10M.2Table 2 Tensile Strength of UnionsUltimate Load, kNNPS Class 150 Class 250 Class 3001811 11 181417 17 273824 24 361234 34 453447 47 62169698011495 95 100112115 115 1252 135 135 180212155 155 2453 180 180 3354 220 220 4905 MARKINGUnions shall be marked
47、on the nut with the manufac-turers name or trademark and nominal pressure classexcept on bar stock unions, where marking is impracti-cal. Additional markings permitted by MSS SP-25 maybe used.6 MATERIALS(a) The mechanical properties of the malleable ironcastings shall be at least equal to those spec
48、ified inASTM A197.(b) Steel bar stock having a yield strength of not lessthan 207 MPa (30 ksi) may be substituted for malleableiron in NPS18unions.(c) Insert rings may be of suitable copper or copperalloy. Where copper alloy seats are furnished, either thehead or tail part of unions produced from ba
49、r stock maybe solid copper alloy. Such parts must meet the tensilestrength requirements listed in Table 2 and Table I-2.7 JOINTS AND SEATSInserts shall be secured into the ends to become apermanent part of them with no signs of cracking.Inserted seat rings shall be of sufficient width to allowample bearing for the seating of the male end.8 THREADING OF PIPE ENDS8.1 Types of ThreadsPipe ends of head and tail parts shall be threaded withtaper pipe threads (ASME B1.20.1) except that NPS18unions made from bar stock may have NPSC internalstraight pipe thread
