1、AN AMERICAN NATIONAL STANDARDDuctile Iron Pipe Flanges and Flanged FittingsClasses 150 and 300ASME B16.42-2011Revision of ASME B16.42-1998 (R2006)ASME B16.42-2011Revision of ASME B16.42-1998 (R2006)Ductile Iron PipeFlanges andFlanged FittingsClasses 150 and 300AN AMERICAN NATIONAL STANDARDThree Park
2、 Avenue New York, NY 10016 USADate of Issuance: November 28, 2011The next edition of this Standard is scheduled for publication in 2016.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard. Periodically certain actions of the ASME B16 Committee may
3、 be published as Cases.Cases and interpretations are published on the ASME Web site under the Committee Pages athttp:/cstools.asme.org as they are issued, and will be published within the next edition of thestandard.ASME is the registered trademark of The American Society of Mechanical Engineers.Thi
4、s 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 assure that individuals fromcompetent and concerned interests have had an opportunity to participate. The pr
5、oposed 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-large.ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device, or activity.
6、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 a standard against liability forinfringement of any applicable letters patent, nor assumes any such lia
7、bility. 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 responsibility.Participation by federal agency representative(s) or person(s) affiliated with industry is not to be
8、 interpreted asgovernment or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the establishedASME procedures and policies, which precludes the issuance of interpretations by individuals.No part of this
9、 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 EngineersThree Park Avenue, New York, NY 10016-5990Copyright 2011 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights r
10、eservedPrinted in U.S.A.CONTENTSForeword ivCommittee Roster . vCorrespondence With the B16 Committee viSummary of Changes vii1 Scope . 12 General . 13 PressureTemperature Ratings 14 Size. 25 Marking . 26 Materials 37 Dimensions 38 Tolerances. 59 Testing 5Figures1 Method of Designating Outlets of Red
11、ucing Fittings . 62 Method of Designating Location of Tapped Holes for Drains When Specified . 7Tables1 PressureTemperature Ratings 82 Reducing Threaded Flanges for Classes 150 and 300 . 93 Dimensions of Class 150 Elbows, Double Branch Elbows, Tees, Crosses, Laterals,True Ys (Straight Sizes), and Re
12、ducers 104 Dimensions of Class 300 Elbows, Tees, Crosses, Laterals, True Ys (Straight Sizes),and Reducers 125 Dimensions of Class 150 Base Elbows and Base Tees . 146 Dimensions of Class 300 Base Elbows and Base Tees . 157 Dimensions of Class 150 Ductile Iron Flanges . 168 Templates for Drilling Clas
13、s 150 Ductile Iron Flanges 179 Dimensions of Class 300 Ductile Iron Flanges . 1810 Templates for Drilling Class 300 Ductile Iron Flanges 20Mandatory AppendicesI PressureTemperature Ratings Dimensions and Templates of Pipe Flangesand Flanged Fittings in U.S. Customary Units . 21II References 35Nonman
14、datory AppendicesA Quality System Program 36B Methods for Establishing PressureTemperature Ratings . 37iiiFOREWORDIn 1921, the American Engineering Standards Committee, later the American StandardsAssociation (ASA), now the American National Standards Institute (ANSI), authorized the organi-zation o
15、f 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
16、Society of the Valves and Fittings Industry (MSS), and TheAmerican Society of Mechanical Engineers (ASME). Cast iron flanges and flanged fittings arewithin the scope of Subcommittee No. 1 (now Subcommittee A), with standards approved byASA as early as 1928.In 1957, piping components of ductile iron
17、(also called nodular iron and, in Europe, spheroidalgraphite iron) first appeared on the market. Controversy immediately developed over properpressuretemperature ratings, and this was further aggravated by the use of casting patterns forboth gray iron and carbon steel for producing the components.Co
18、nflicting philosophies, which emerged from that controversy, thwarted efforts by MSS todevelop standard practices in the early 1960s; the conflicts persisted during a study of ratings,starting in 1966 by American National Standards Committee B16 (as the Sectional Committeewas called after reorganiza
19、tion of ASA as ANSI). The conflict continued to delay acceptance andapproval of this Standard, which ultimately originated with a draft developed by MSS (takingadvantage of earlier efforts) and submitted to Subcommittee A in 1977. Combining that draftwith the rating basis developed in the B16 Commit
20、tee, the first edition of this Standard wasfound acceptable and was approved by the Standards Committee, cosecretariat organizations,and ANSI, and was published with the designation ANSI B16.42-1979.In 1982, American National Standards Committee B16 was reorganized as an ASME Committeeoperating unde
21、r procedures accredited by ANSI. The 1987 edition of the Standard updated thereferenced standards and specifications, and established U.S. Customary units as the standard.Following approval by the Standards Committee and ASME, ANSI granted its approval as anAmerican National Standard on July 13, 198
22、7, with the new designation ASME/ANSI B16.42-1987.In the 1998 edition of ASME B16.42, reference standards were updated, a quality systemprogram annex was added, and several editorial revisions were made. Following approval byASME B16 Subcommittee B and the B16 Standards Committee, ANSI approved the
23、AmericanNational Standard on November 20, 1998.Metric units were provided as an independent but parallel alternative standard to theU.S. Customary units in the 2011 edition. Following approval by the Standards Committee andthe ASME Board on PTCS, this revision to the 1998 edition of this Standard wa
24、s approved as anAmerican National Standard by ANSI on August 9, 2011 with the new designationASME B16.42-2011.Requests for interpretation or suggestions for revision should be sent to the Secretary,B16 Committee, The American Society of Mechanical Engineers, Three Park Avenue, New York,NY 10016-5990
25、.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 ChairD. R. Sharp, SecretarySTANDARDS COMMITTEE PERSONNELA. Appleton,
26、 Alloy Stainless Products Co., Inc.R. W. Barnes, Anric Enterprises, Inc.W. B. Bedesem, ConsultantR. M. Bojarczuk, ExxonMobil Research and Engineering Co.D. F. Buccicone, Elkhart Products Corp.A. M. Cheta, Royal Dutch ShellM. A. Clark, Nibco, Inc.G. A. Cuccio, Capitol Manufacturing Co.C. E. Davila, C
27、rane EnergyD. R. Frikken, Becht Engineering Co.R. P. Griffiths, U.S. Coast GuardSUBCOMMITTEE B THREADED FITTINGS (EXCEPT STEEL), FLANGES, AND FLANGED FITTINGSK. Barron, Vice Chair, Ward ManufacturingC. E. OBrien, Secretary, The American Society of MechanicalEngineersW. Bliss, Tyler Pipe Co.R. W. Bon
28、ds, Ductile Iron Pipe Research AssociationM. A. Clark, Nibco, Inc.J. R. Holstrom, Val-Matic Valve and Manufacturing Corp.vG. A. Jolly, Vogt Valves/Flowserve Corp.M. Katcher, Haynes InternationalW. N. McLean, B however, they shouldnot contain proprietary names or information.Requests that are not in
29、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 available.
30、 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 holds meetin
31、gs, whichare open to the public. Persons wishing to attend any meeting should contact the Secretary ofthe B16 Standards Committee.viASME B16.42-2011SUMMARY OF CHANGESFollowing approval by the ASME B16 Committee and ASME, and after public review,ASME B16.42-2011 was approved by the American National
32、Standards Institute on August 9, 2011.ASME B16.42-2011 includes the following changes identified by a margin note, (11). In addition,in the main text, the “General” section was moved to section 2, and the subsequent sections andtheir paragraphs were renumbered accordingly. Metric (SI) values were ad
33、ded throughout themain text and tables.Page Location Change1 1 Subparagraph (b) revised2 (1) Former para. 1.3.2 deleted(2) Paragraphs 2.3 through 2.6 added24 3.2 Second paragraph revised3.3 Revised3.5 First paragraph revised4.1 Revised5 Subparagraph (f) revised6.2 First paragraph revised7 Footnote 1
34、 deleted7.2.1 Revised7.4 Revised7.6.3 Revised7.7.2 Revised7.8 Revised5 9.3 Subparagraph (a) revised9 Table 2 Note (3) revised10, 11 Table 3 (1) Former Table 5 redesignated asTable 3(2) Last column head revised12, 13 Table 4 (1) Former Table 9 redesignated asTable 4(2) Last column head revised14 Tabl
35、e 5 Former Table 6 redesignated as Table 515 Table 6 Former Table 10 redesignated as Table 616 Table 7 (1) Former Table 4 redesignated asTable 7(2) Seventh column head revised17 Table 8 (1) Former Table 3 redesignated asTable 8viiPage Location Change(2) Note (2) revised18, 19 Table 9 (1) Former Tabl
36、e 8 redesignated asTable 9(2) Eighth column head revised20 Table 10 (1) Former Table 7 redesignated asTable 10(2) In seventh column head, Notereference revised2134 Mandatory Appendix I Added35 Mandatory Appendix II Former Annex B redesignated asMandatory Appendix II and revised inits entirety36 Nonm
37、andatory Appendix A Former Annex C redesignated asNonmandatory Appendix A37 Nonmandatory Appendix B Former Annex A redesignated asNonmandatory Appendix Bviii(11)(11)ASME B16.42-2011DUCTILE IRON PIPE FLANGES AND FLANGED FITTINGSClasses 150 and 3001 SCOPEThis Standard covers minimum requirements forCl
38、asses 150 and 300 cast ductile iron pipe flanges andflanged fittings. The requirements covered are asfollows:(a) pressuretemperature ratings(b) sizes and method of designating openings ofreducing fittings(c) marking(d) material(e) dimensions and tolerances(f) bolts, nuts, and gaskets(g) tests2 GENER
39、AL2.1 ReferencesStandards 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 standard andspecification in the individual references. Instead, thespecific e
40、dition reference is identified in the Appendix.2.2 Quality SystemsRequirements relating to the product manufacturersquality system programs are described inNonmandatory Appendix A.2.3 Relevant UnitsThis Standard states values in both SI (Metric) andU.S. Customary units. As an exception, diameters of
41、bolts and flange bolt holes are only expressed in inchunits. These systems of units are to be regarded sepa-rately as standard. Within the text, the U.S. Customaryunits are shown in parentheses or in separate tables thatappear in Mandatory Appendix I. The values stated ineach system are not exact eq
42、uivalents; therefore, it isrequired that each system of units be used indepen-dently of the other. Except for the diameters of boltsand flange bolt holes, combining values from the twosystems constitutes nonconformance with the Standard.2.4 ServiceCriteria for selection of materials suitable for par
43、ticu-lar fluid service are not within the scope of this Standard.12.5 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 calculat
44、ed 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.2.6 Denotation2.6.1 Pressure Rating Designation. Class, followedby a dimensionless number, is the designation forpressure
45、temperature ratings, as follows:(a) Class 150(b) Class 3002.6.2 Size. NPS, followed by a dimensionless num-ber, is the designation for nominal flange or flangedfitting size. NPS is related to the referenced nominaldiameter, DN, used in metric units. The relationship istypically as follows:NPS DN1251
46、14321124025021265380312904 100For NPS 4, the related DN p 25 H11547 NPS.3 PRESSURETEMPERATURE RATINGS3.1 GeneralCast ductile iron pipe flanges and flanged fittingscovered by this Standard shall be designated as one ofthe following: Class 150 or Class 300.Except as provided in para. 3.5, ratings are
47、maximumallowable working pressures, expressed as gage pres-sure, at the service temperature from 29C (20F) to343C (650F). Ratings in Table 1 are in Metric units.For intermediate temperatures, linear interpolation ispermitted. Methods for establishing pressuretemperature ratings are given in Mandator
48、y Appendix I.(11)(11)(11)ASME B16.42-20113.2 Ratings of Flanged JointsRatings in this Standard apply to flanged joints thatconform to the limitations on bolting in para. 6.2 andon gaskets in para. 7.8, and which are made up in accor-dance with good practice for alignment and assembly.See also para.
49、3.4.Use of the ratings for flanged joints not conformingto these limitations is the sole responsibility of the user.A flanged joint is composed of separate and indepen-dent, although interrelated, components: the flanges, thegasket, and the bolting, which are assembled by anotherinfluence, the assembler. Proper controls must be exer-cised in the selection and application for all these ele-ments to attain a joint that has acceptable leak tightness.Special techniques, such as controlled bolt tightening,are described in ASME PCC-1.If the two flanges in a fl
