1、Pipe Flanges and Flanged Fittings NPS 1/2 Through NPS 24 Metric/Inch StandardAN AMERICAN NATIONAL STANDARDASME B16.5-2013(Revision of ASME B16.5-2009)ASME B16.5-2013(Revision of ASME B16.5-2009)Pipe Flanges andFlanged FittingsNPS12Through NPS 24Metric/Inch StandardAN AMERICAN NATIONAL STANDARDTwo Pa
2、rk Avenue New York, NY 10016 USADate of Issuance: April 29, 2013The next edition of this Standard is scheduled for publication in 2015.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard. Interpretations are published on the ASME Web site under th
3、e Committee Pages athttp:/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 errors in codes andstandards. Such errata shall be used on the d
4、ate 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 “Publ
5、icationInformation” 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
6、 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 public
7、-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 anyone u
8、tilizing 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 res
9、ponsibility.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.ASME accepts responsibility for only those interpretations of this document issued in accordance with the establi
10、shedASME 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 EngineersTwo
11、 Park Avenue, New York, NY 10016-5990Copyright 2013 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword viCommittee Roster ixCorrespondence With the B16 Committee . xSummary of Changes xi1 Scope . 12 PressureTemperature Ratings 23 Component Size . 34 Ma
12、rking . 35 Materials 76 Dimensions 97 Tolerances . 138 Pressure Testing . 14Figures1 Bevel for Outside Thickness . 152 Bevel for Inside Thickness . 153 Bevel for Combined Thickness . 154 Straight Hub Welding Flanges . 155 Method of Designating Outlets of Reducing Fittings in Specifications . 166 End
13、 Flange Facings and Their Relationship to Flange Thickness andCenter-to-End and End-to-End Dimensions 177 Bevel for Wall Thicknesses t From 5 mm to 22 mm Inclusive . 198 Bevel for Wall Thicknesses t Greater Than 22 mm 199 Inside Contour for Use With Rectangular Backing Ring . 2010 Inside Contour for
14、 Use With Taper Backing Ring . 2011 Thread Length for Connection Tapping 2112 Socket Welding for Connections . 2113 Bosses for Connections 2114 Butt Welding for Connections 2115 Method of Designating Location of Auxiliary Connections WhenSpecified 22Tables1A List of Material Specifications 41B List
15、of Bolting Specifications Applicable ASTM Specifications . 81C Flange Bolting Dimensional Recommendations . 122-1.1 PressureTemperature Ratings for Group 1.1 Materials . 232-1.2 PressureTemperature Ratings for Group 1.2 Materials . 242-1.3 PressureTemperature Ratings for Group 1.3 Materials . 252-1.
16、4 PressureTemperature Ratings for Group 1.4 Materials . 262-1.5 PressureTemperature Ratings for Group 1.5 Materials . 27iii2-1.7 PressureTemperature Ratings for Group 1.7 Materials . 282-1.9 PressureTemperature Ratings for Group 1.9 Materials . 292-1.10 PressureTemperature Ratings for Group 1.10 Mat
17、erials 302-1.11 PressureTemperature Ratings for Group 1.11 Materials 312-1.13 PressureTemperature Ratings for Group 1.13 Materials 322-1.14 PressureTemperature Ratings for Group 1.14 Materials 332-1.15 PressureTemperature Ratings for Group 1.15 Materials 342-1.17 PressureTemperature Ratings for Grou
18、p 1.17 Materials 352-1.18 PressureTemperature Ratings for Group 1.18 Materials 362-2.1 PressureTemperature Ratings for Group 2.1 Materials . 372-2.2 PressureTemperature Ratings for Group 2.2 Materials . 382-2.3 PressureTemperature Ratings for Group 2.3 Materials . 392-2.4 PressureTemperature Ratings
19、 for Group 2.4 Materials . 402-2.5 PressureTemperature Ratings for Group 2.5 Materials . 412-2.6 PressureTemperature Ratings for Group 2.6 Materials . 422-2.7 PressureTemperature Ratings for Group 2.7 Materials . 432-2.8 PressureTemperature Ratings for Group 2.8 Materials . 442-2.9 PressureTemperatu
20、re Ratings for Group 2.9 Materials . 452-2.10 PressureTemperature Ratings for Group 2.10 Materials 462-2.11 PressureTemperature Ratings for Group 2.11 Materials 472-2.12 PressureTemperature Ratings for Group 2.12 Materials 482-3.1 PressureTemperature Ratings for Group 3.1 Materials . 492-3.2 Pressur
21、eTemperature Ratings for Group 3.2 Materials . 492-3.3 PressureTemperature Ratings for Group 3.3 Materials . 502-3.4 PressureTemperature Ratings for Group 3.4 Materials . 502-3.5 PressureTemperature Ratings for Group 3.5 Materials . 512-3.6 PressureTemperature Ratings for Group 3.6 Materials . 522-3
22、.7 PressureTemperature Ratings for Group 3.7 Materials . 532-3.8 PressureTemperature Ratings for Group 3.8 Materials . 542-3.9 PressureTemperature Ratings for Group 3.9 Materials . 552-3.10 PressureTemperature Ratings for Group 3.10 Materials 562-3.11 PressureTemperature Ratings for Group 3.11 Mater
23、ials 562-3.12 PressureTemperature Ratings for Group 3.12 Materials 572-3.13 PressureTemperature Ratings for Group 3.13 Materials 582-3.14 PressureTemperature Ratings for Group 3.14 Materials 592-3.15 PressureTemperature Ratings for Group 3.15 Materials 602-3.16 PressureTemperature Ratings for Group
24、3.16 Materials 612-3.17 PressureTemperature Ratings for Group 3.17 Materials 622-3.19 PressureTemperature Ratings for Group 3.19 Materials 623 Permissible Imperfections in Flange Facing Finish for Raised Face andLarge Male and Female Flanges . 634 Dimensions of Facings (Other Than Ring Joints, All P
25、ressure RatingClasses) . 645 Dimensions of Ring-Joint Facings (All Pressure Rating Classes) . 666 Reducing Threaded and Slip-On Flanges for Classes 150 Through2500 707 Templates for Drilling Class 150 Pipe Flanges and Flanged Fittings . 718 Dimensions of Class 150 Flanges . 729 Dimensions of Class 1
26、50 Flanged Fittings 7510 Templates for Drilling Class 300 Pipe Flanges and Flanged Fittings . 8011 Dimensions of Class 300 Flanges . 8112 Dimensions of Class 300 Flanged Fittings 8413 Templates for Drilling Class 400 Pipe Flanges 8814 Dimensions of Class 400 Flanges . 8915 Templates for Drilling Cla
27、ss 600 Pipe Flanges and Flanged Fittings . 9116 Dimensions of Class 600 Flanges . 92iv17 Templates for Drilling Class 900 Pipe Flanges and Flanged Fittings . 9418 Dimensions of Class 900 Flanges . 9519 Templates for Drilling Class 1500 Pipe Flanges . 9720 Dimensions of Class 1500 Flanges 9821 Templa
28、tes for Drilling Class 2500 Pipe Flanges . 10022 Dimensions of Class 2500 Flanges 101Mandatory AppendicesI Threading of Pipe for American National Standard Threaded Flanges . 103II PressureTemperature Ratings and Dimensional Data for Classes 150, 300,400, 600, 900, 1500, and 2500 Flanges and Classes
29、 150 and 300Flanged Fittings in U.S. Customary Units 105III References 193Nonmandatory AppendicesA Method Used for Establishing PressureTemperature Ratings . 196B Limiting Dimensions of Gaskets Other Than Ring Joint Gaskets 200C Method for Calculating Bolt Lengths . 202D Quality System Program . 204
30、E Dimensions of Classes 400, 600, 900, 1500, and 2500 Flanged Fittings inU.S. Customary Units . 205vFOREWORDIn 1920, the American Engineering Standards Committee later the American StandardsAssociations (ASA) organized Sectional Committee B16 to unify and further develop standardsfor pipe flanges an
31、d fittings (and later for valves and gaskets). Cosponsors of the B16 Committeewere ASME, the Heating and Piping Contractors National Association now MechanicalContractors Association of America (MCAA), and the Manufacturers Standardization Societyof the Valves and Fittings Industry (MSS). Cosponsors
32、 were later designated as cosecretariatorganizations.The Committee soon recognized the need for standardization of steel pipe flanges. In May,1923, Subcommittee 3 was organized to develop such standards for pressures in the 250-psi to3,200-psi range and for elevated temperatures. Active work began i
33、n October, including steelflanged fittings. The first proposed standard was submitted to the Committee in April 1926 andapproved by letter ballot in December. After favorable review by the three sponsor organizations,the Standard was approved as American Tentative Standard B16e in June 1927.Experien
34、ce in using the Standard showed the need for hub dimensions of companion flangesand for other changes, including rerating of 250-lb and 1,350-lb flanges and development offlanged fittings with integral bases. An investigation was made into the factors determiningstiffness of flanges and flange hubs.
35、 The revised edition was approved as ASA B16E-1932.A revision was initiated in 1936, stimulated by suggestions from Committee members andindustrial users. The resulting 1939 edition contained standards for welding neck flanges (com-pleted in March 1937), 1,500-lb flanges in the 14-in. through 24-in.
36、 range, 2,500-lb flanges andflanged fittings in the12-in. through 12-in. range, and dimensions for a full line of ring jointflanges developed by the American Petroleum Institute. Pressuretemperature ratings for alloysteel flanges and fittings, developed by Subcommittee 4, were included for the first
37、 time.In August 1942, the War Production Board requested a review of measures to conserve vitalmaterials in piping components. A special War Committee of B16 was appointed and, operatingunder War Standard Procedure, developed revised pressuretemperature ratings for all materialsand pressure classes.
38、 The ratings were published as American War Standard B16e5-1943. In 1945,under normal procedures, Subcommittees 3 and 4 reviewed the 1939 standard and 1943 ratingsand recommended adoption of the wartime ratings. Their report was approved as SupplementNo. 1 to B16e-1939 and published as ASA B16e6-194
39、9. In addition to ratings, the supplementupdated material specification references and added a table of metal wall thickness for welding-end valves.Subcommittee 3 then began a revision of the entire standard. Technically, the 1949 Supplementwas absorbed, new materials were recognized, a general rati
40、ng method was developed andadded as an appendix, and welding end preparations were expanded. Editorially, a new style ofpresentation was worked out, including tables rearranged for easier use. Approval by SectionalCommittee, cosponsors, and ASA resulted in the publication of ASA B16.5-1953 (designat
41、ionchanged from B16e).Work soon began on further revisions. Class B ratings were deleted, and Class A ratings wereclarified as the standard. An appendix defined qualifications for gaskets, other than ring joint,which would merit the ratings. Another appendix defined the method for calculating bolt l
42、engths,including the measurement of stud bolt length between thread ends instead of points. Pressuretemperature ratings for several new materials were added, the table of welding end dimensionswas expanded, and the temperatures used in determining ratings were redefined. The resultingnew edition, af
43、ter approval, was published as ASA B16.5-1957.The more modest revision approved as ASA B16.5-1961 changed the text to clarify the intentor to make requirements easier to administer. The next revision began in 1963 with nearly 100comments and suggestions. No fundamental changes were made, but the tex
44、t was further clarified,and wall thicknesses less than14in. for flanged fittings were recognized in the 1968 edition.viA new joint study of ratings between Subcommittees 3 and 4 was initiated before the nextrevision. Based on the Subcommittee 4 report, the rating procedure was revised, and a ratingb
45、asis for Class 150 (150 lb) flanges was developed. New product forms, bar and plate, were addedfor special applications, including fabricated flanged valves and fittings. Reference to welding-end valves was not included, because a separate standard for them was. Bolt length calculationsbased on wors
46、t case tolerances led to a revision of tabulated lengths. Testing of valves subsequentlypublished by SC 15 closure members was added to the test requirements. Following final approvalon October 23, the Standard was published as ANSI B16.5-1973.Subcommittee N (formerly 15) was assigned responsibility
47、 for all valve standards in late 1973.Subcommittee C (formerly 3) continues to have responsibility for flange standards. A revisionwas accordingly initiated to remove all references to valves. At the same time, comments fromusers and changes in the ASME Boiler and Pressure Vessel Code led to signifi
48、cant revisions inthe Class 150 rating basis and in the ratings of stainless steel and certain alloy steel flanges andflanged fittings in all rating classes. Extensive public review comments led to the addition ofconsiderations for bolting and gaskets for flanged joints and of marking requirements. T
49、o avoidfrequent and confusing changes in ratings as further changes in Code allowable stresses are made,it was agreed with Subcommittee N to leave ratings alone unless the relevant Code stress values arechanged by more than 10%. After final approval by the Standards Committee, cosponsors, andANSI, ANSI B16.5-1977, Steel Pipe Flanges and Flanged Fittings, was published on June 16, 1977.In 1979, work began on another new edition. Materials coverage was expanded by the additionof nickel and nickel alloys. Bolting rules were revised
