1、AN AMERICAN NATIONAL STANDARD ASME B16.42-2016(Revision of ASME B16.42-2011)Ductile Iron Pipe Flanges and Flanged FittingsClasses 150 and 300ASME B16.42-2016(Revision of ASME B16.42-2011)Ductile Iron PipeFlanges andFlanged FittingsClasses 150 and 300AN AMERICAN NATIONAL STANDARDTwo Park Avenue New Y
2、ork, NY 10016 USADate of Issuance: December 19, 2016The next edition of this Standard is scheduled for publication in 2021.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard. Periodically certain actions of the ASME B16 Committee may be published
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5、is option can be found on the appropriate Committee Page after selecting “Errata” in the “PublicationInformation” 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 Ameri
6、can 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 proposed code or standard was madeavailable for public review and comment that provides an oppor
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10、sibility 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 document may be reproduced in any form,in an electronic retrieval system or otherwise,without
11、 the prior written permission of the publisher.The American Society of Mechanical EngineersTwo Park Avenue, New York, NY 10016-5990Copyright 2016 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword ivCommittee Roster . vCorrespondence With the B16 Commi
12、ttee viSummary of Changes viiiList of Changes in Record Number Order ix1 Scope . 12 General . 13 PressureTemperature Ratings 14 Size. 25 Marking . 26 Materials 37 Dimensions 38 Tolerances. 59 Testing 5Figures1 Method of Designating Outlets of Reducing Fittings . 62 Method of Designating Location of
13、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 Reducers 104 Dimensions of Class 300 Elbows, Tees, Cross
14、es, 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 Class 150 Ductile Iron Flanges 179 Dimensions of Class 300
15、 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 35Nonmandatory AppendicesA Quality System Program 36B Methods
16、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 of a Sectional Committee on the Standardization of Pipe
17、 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 Society of the Valves and Fittings Industry (MSS), and
18、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 (also called nodular iron and, in Europe, spheroidalgra
19、phite 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.Conflicting philosophies, which emerged from that controv
20、ersy, 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 reorganization of ASA as ANSI). The conflict continued to delay a
21、cceptance 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 Committee, the first edition of this Standard wasfound accept
22、able 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 under procedures accredited by ANSI. The 1987 edition of th
23、e 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 approvalof the edition as an American National Standard on July 13, 1987, with the new designationASME/ANSI B16
24、.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 AmericanNational Standard on November 20,
25、 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, the revision to the 1998 edition of this Standard was approved as anAmerican National Standard
26、 by ANSI on August 9, 2011, with the new designationASME B16.42-2011.In this 2016 edition, revisions have been made to table and appendix references. Followingapproval by the ASME B16 Standards Committee, ANSI approved this edition onNovember 7, 2016, with the new designation ASME B16.42-2016.ivASME
27、 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. M. Bojarczuk, ChairC. E. Davila, Vice ChairC. Ramcharran, SecretarySTANDARDS COMMITTEE PERSONNELA. Appleton, A
28、lloy Stainless Products Co., Inc.J. E. Barker, Dezurik Water ControlsR. W. Barnes, Anric Enterprises, Inc.P. Milankov, Alternate, Anric Enterprises, Inc.K. Barron, Ward ManufacturingD. C. Bayreuther, Metso Automation, Flow Control DivisionW. B. Bedesem, ConsultantR. M. Bojarczuk, ExxonMobil Research
29、 and Engineering Co.A. M. Cheta, Qatar Shell GTLM. A. Clark, NIBCO, Inc.G. A. Cuccio, Capitol Manufacturing Co.J. DAvanzo, Fluoroseal ValvesC. E. Davila, Crane EnergyD. R. Frikken, Becht Engineering Co.R. B. Hai, RBH AssociatesSUBCOMMITTEE B THREADED FITTINGS (EXCEPT STEEL), FLANGES, AND FLANGED FIT
30、TINGSK. Barron, Chair, Ward ManufacturingG. T. Walden, Vice Chair, WolseleyE. Lawson, Secretary, The American Society of MechanicalEngineersW. Bliss, Tyler Pipe Co.M. A. Clark, NIBCO, Inc.vG. A. Jolly, Samshin Ltd.M. Katcher, Haynes InternationalT. A. McMahon, Emerson Process ManagementM. L. Nayyar,
31、 NICEW. H. Patrick, The Dow Chemical Co.D. Rahoi, CCM 2000C. Ramcharran, The American Society of Mechanical EngineersR. A. Schmidt, CanadoilJ. Tucker, FlowserveF. R. Volgstadt, Volgstadt and Associates, Inc.F. Feng, Delegate, China Productivity Center for MachineryP. V. Craig, Contributing Member, J
32、omar GroupB. G. Fabian, Contributing Member, Pennsylvania Machine WorksA. G. Kireta, Jr., Contribuing Member, Copper DevelopmentAssociation, Inc.D. F. Reid, Contributing Member, VSP TechnologiesJ. R. Holstrom, Val-Matic Valve and Manufacturing Corp.D. Hunt, Jr., Fastenal Co.W. H. Levan, Cast Iron So
33、il Pipe InstituteJ. K. Schultz, Conine Manufacturing Co., Inc.G. L. Simmons, Charlotte Pipe and FoundryA. A. Knapp, Contributing Member, A. Knapp and AssociatesCORRESPONDENCE WITH THE B16 COMMITTEEGeneral. ASME Standards are developed and maintained with the intent to represent theconsensus of conce
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48、ct the Secretary of the B16 Standards Committee.viiASME B16.42-2016SUMMARY OF CHANGESFollowing approval by the ASME B16 Committee and ASME, and after public review,ASME B16.42-2016 was approved by the American National Standards Institute onNovember 7, 2016.ASME B16.42-2016 includes the following ch
49、anges identified by a margin note, (16). The RecordNumbers listed below are explained in more detail in the “List of Changes in Record NumberOrder” following this Summary of Changes.Page Location Change (Record Number)3 7.3 Revised (11-1130)9 Table 2 In illustrations and Notes, formerNotes (1) and (2) editoriallyredesignated as Notes (2) and (1),respectively16 Table 7 In illustrations, “0.06” corrected by erratato “1.5”18 Table 9 In lower left illustration, “0.06” correctedby errata to “1.5”23 Table I-2 In illustrations and Notes, formerNotes (1) and (2) editoriallyredes
