1、ASMEAN AMERICAN NATIONAL STANDARDPipe Flanges and Flanged FittingsNPS 1/2Through NPS 24 Metric/Inch StandardASME B16.5-2003(Revision of ASME B16.5-1996)Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,
2、-,-AN AMERICAN NATIONAL STANDARDPIPE FLANGES ANDFLANGED FITTINGSNPS12Through NPS 24Metric/Inch StandardASME B16.5-2003(Revision of ASME B16.5-1996)Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Da
3、te of Issuance: October 29, 2004The next edition of this Standard is scheduled for publication in 2007. There will be no addenda orwritten interpretations to the requirements of this Standard issued to this edition.ASME is the registered trademark of The American Society of Mechanical Engineers.This
4、 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 pro
5、posed 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.A
6、SME 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 liab
7、ility. 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 2004 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights re
10、servedPrinted in U.S.A.Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-CONTENTSForeword viCommittee Roster ixCorrespondence With the B16 Committee . x1 Scope . 12 Pressure-Temperature Ratings . 23
11、Component Size . 34 Marking . 35 Materials 66 Dimensions 97 Tolerances . 128 Pressure Testing . 14Figures1 Method of Designating Location of Auxiliary Connections WhenSpecified 152 Method of Designating Outlets of Reducing Fittings in Specifications 163 Thread Length for Connection Tapping . 174 Soc
12、ket Welding for Connections 175 Butt Welding for Connections 176 Bosses for Connections . 177 End Flange Facings and Their Relationship to Flange Thickness andCenter-to-End and End-to-End Dimensions . 188 Bevel for Wall Thicknesses t From 5 mm to 22 mm Inclusive 209 Bevel for Wall Thicknesses t Grea
13、ter Than 22 mm. 2010 Inside Contour for Use With Rectangular Backing Ring . 2111 Inside Contour for Use With Taper Backing Ring 2112 Bevel for Outside Thickness 2213 Bevel for Inside Thickness 2214 Bevel for Combined Thickness . 2215 Straight Hub Welding Flanges 22Tables1A List of Material Specifica
14、tions 41B List of Bolting Specifications Applicable ASTM Specifications . 71C 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
15、 252-1.4 PressureTemperature Ratings for Group 1.4 Materials 262-1.5 PressureTemperature Ratings for Group 1.5 Materials 272-1.7 PressureTemperature Ratings for Group 1.7 Materials 282-1.9 PressureTemperature Ratings for Group 1.9 Materials 29iiiCopyright ASME International Provided by IHS under lic
16、ense with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-2-1.10 PressureTemperature Ratings for Group 1.10 Materials . 302-1.11 PressureTemperature Ratings for Group 1.11 Materials . 312-1.13 PressureTemperature Ratings for Group 1.13 Materials . 322-1.14 Pres
17、sureTemperature Ratings for Group 1.14 Materials . 332-1.15 PressureTemperature Ratings for Group 1.15 Materials . 342-1.17 PressureTemperature Ratings for Group 1.17 Materials . 352-2.1 PressureTemperature Ratings for Group 2.1 Materials 362-2.2 PressureTemperature Ratings for Group 2.2 Materials 3
18、72-2.3 PressureTemperature Ratings for Group 2.3 Materials 382-2.4 PressureTemperature Ratings for Group 2.4 Materials 392-2.5 PressureTemperature Ratings for Group 2.5 Materials 402-2.6 PressureTemperature Ratings for Group 2.6 Materials 412-2.7 PressureTemperature Ratings for Group 2.7 Materials 4
19、22-2.8 PressureTemperature Ratings for Group 2.8 Materials 432-2.9 PressureTemperature Ratings for Group 2.9 Materials 442-2.10 PressureTemperature Ratings for Group 2.10 Materials . 452-2.11 PressureTemperature Ratings for Group 2.11 Materials . 462-2.12 PressureTemperature Ratings for Group 2.12 M
20、aterials . 472-3.1 PressureTemperature Ratings for Group 3.1 Materials 482-3.2 PressureTemperature Ratings for Group 3.2 Materials 482-3.3 PressureTemperature Ratings for Group 3.3 Materials 492-3.4 PressureTemperature Ratings for Group 3.4 Materials 502-3.5 PressureTemperature Ratings for Group 3.5
21、 Materials 512-3.6 PressureTemperature Ratings for Group 3.6 Materials 522-3.7 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.
22、10 Materials . 562-3.11 PressureTemperature Ratings for Group 3.11 Materials . 562-3.12 PressureTemperature Ratings for Group 3.12 Materials . 572-3.13 PressureTemperature Ratings for Group 3.13 Materials . 572-3.14 PressureTemperature Ratings for Group 3.14 Materials . 582-3.15 PressureTemperature
23、Ratings for Group 3.15 Materials . 592-3.16 PressureTemperature Ratings for Group 3.16 Materials . 602-3.17 PressureTemperature Ratings for Group 3.17 Materials . 613 Permissible Imperfections in Flange Facing Finish for Raised Face andLarge Male and Female Flanges 614 Dimensions of Facings (Other T
24、han Ring Joints, All Pressure RatingClasses) . 625 Dimensions of Ring-Joint Facings (All Pressure Rating Classes) 646 Reducing Threaded and Slip-On Flanges for Classes 150 Through 2500 687 Templates for Drilling Class 150 Flanges 698 Dimensions of Class 150 Flanges . 709 Dimensions of Class 150 Flan
25、ged Fittings . 7310 Templates for Drilling Class 300 Flanges 7811 Dimensions of Class 300 Flanges . 7912 Dimensions of Class 300 Flanged Fittings . 8213 Templates for Drilling Class 400 Flanges 8614 Dimensions of Class 400 Flanges . 8715 Templates for Drilling Class 600 Flanges 8916 Dimensions of Cl
26、ass 600 Flanges . 9017 Templates for Drilling Class 900 Flanges 9218 Dimensions of Class 900 Flanges . 9319 Templates for Drilling Class 1500 Flanges. 9520 Dimensions of Class 1500 Flanges 9621 Templates for Drilling Class 2500 Flanges. 98ivCopyright ASME International Provided by IHS under license
27、with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-22 Dimensions of Class 2500 Flanges 99AnnexesA Threading of Pipe for American National Standard Thread Flanges 101B Method Used for Establishing Pressure-Temperature Ratings 103C Limiting Dimensions of Gasket
28、s Other Than Ring Joint Gaskets . 107D Method for Calculating Bolt Lengths . 109E Quality System Program . 111F PressureTemperature Ratings and Dimensional Data for Classes 150, 300,400, 600, 900, 1500, and 2500 Flanges and Classes 150 and 300Flanged Fittings in U.S. Customary Units. 112G Dimensions
29、 of Classes 400, 600, 900, 1500, and 2500 Flanged Fittings inU.S. Customary Units 195H References . 214vCopyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-FOREWORDIn 1920, the American Engineering Sta
30、ndards Committeelater the American Standards Associa-tions (ASA) organized Sectional Committee B16 to unify and further develop standards for pipeflanges and fittings (and later for valves and gaskets). Co-sponsors of the B16 Committee werethe American Society of Mechanical Engineers (ASME), the Hea
31、ting and Piping ContractorsNational Association now Mechanical Contractors Association of America (MCAA), and theManufacturers Standardization Society of the Valves and Fittings Industry (MSS). Co-sponsorswere later designated as co-secretariat organizations.The Committee soon recognized the need fo
32、r standardization of steel pipe flanges. In May,1923, Subcommittee 3 was organized to develop such standards for pressures in the 250 psi to3200 psi range and for elevated temperatures. Active work began in October, including steelflanged fittings. The first proposed standard was submitted to the Co
33、mmittee 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.Experience in using the Standard showed the need for hub dimensions of companion flangesand for other c
34、hanges, including rerating of 250 lb and 1350 lb flanges and development offlanged fittings with integral bases. An investigation was made into the factors determiningstiffness of flanges and flange hubs. The revised edition was approved as ASA B16E-1932.A revision was initiated in 1936, stimulated
35、by suggestions from Committee members andindustrial users. The resulting 1939 edition contained standards for welding neck flanges (com-pleted in March 1937), 1500 lb flanges in the 14 in. through 24 in. range 2500 lb flanges andflanged fittings in the12in. through 12-in. range, and dimensions for a
36、 full line of ring jointflanges developed by the American Petroleum Institute. Pressure-temperature ratings for alloysteel flanges and fittings, developed by Subcommittee 4, were included for the first time.In August 1942, the War Production Board requested a review of measures to conserve vitalmate
37、rials in piping components. A special War Committee of B16 was appointed and, operatingunder War Standard Procedure, developed revised pressure-temperature ratings for all materialsand all pressure classes. The ratings were published as American War Standard B16e5-1943. In1945, under normal procedur
38、es, Subcommittees 3 and 4 reviewed the 1939 standard and the1943 ratings, and recommended adoption of the wartime ratings. Their report was approved asSupplement No. 1 to B16e-1939 and published as ASA B16e6-1949. In addition to ratings, thesupplement updated material specification references and ad
39、ded a table of metal wall thicknessfor welding-end valves.Subcommittee 3 then began a revision of the entire standard. Technically, the 1949 Supplementwas absorbed, new materials were recognized, a general rating method was developed andadded as an appendix, and welding end preparations were expande
40、d. Editorially, a new style ofpresentation was worked out, including tables rearranged for easier use. Approval by SectionalCommittee, cosponsors, and ASA resulted in publication of ASA B16.5-1953 (designation changedfrom B16e).Work soon began on further revisions. Class B ratings were deleted and C
41、lass 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 lengths(including measurement of the length of stud bolts between thread ends instead of between
42、points). Pressure-temperature ratings for several new materials were added, the table of weldingend dimensions was expanded, and the temperatures used in determining ratings were redefined.The resulting new edition, after approval, was published as ASA B16.5-1957.The more modest revision approved as
43、 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 text was further clarifiedand wall thicknesses less then14in. for flanged fittings we
44、re recognized in the 1968 edition.viCopyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A new joint study of ratings between Subcommittees 3 and 4 was initiated before the nextrevision. Based on Subcom
45、mittee 4 report, the rating procedure was revised and a rating basisfor Class 150 (150 lb) flanges was developed. New product forms, bar and plate, were added forspecial applications, including fabricated flanged valves and fittings. Reference to welding-endvalves was not included because a separate
46、 standard for them was. Bolt length calculations basedon worst case tolerances led to a revision of tabulated lengths. Testing of valve subsequentlypublished by SC 15 closure members was added to the test requirements. Following final approvalon October 23, the Standard was published as ANSI B16.5-1
47、973.Subcommittee N (formerly 15) was assigned responsibility 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 change
48、s in the ASME Boiler and Pressure Vessel Code led to significant revisions inthe Class 150 rating basis, and, in the ratings of stainless steel and certain alloy steel flangesand flanged fittings in all rating classes. Extensive public review comments led to addition ofconsiderations for flanged joi
49、nts, for bolting and gaskets, and of marking requirements. To avoidfrequent and confusing changes in ratings as further changes in Code allowable stresses aremade, it was agreed with Subcommittee N to leave ratings alone unless the relevant Code stressvalues are changed by more than 10%. After final approval by Standards Committee, co-sponsors
