1、Orifice FlangesAN AMERICAN NATIONAL STANDARDASME B16.36-2006(Revision of ASME B16.36-1996)Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B16.36-2006(Revision of ASME B16.36-1996)Orifice Flan
2、gesAN AMERICAN NATIONAL STANDARDThree Park Avenue New York, NY 10016Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Date of Issuance: June 8, 2007The next edition of this Standard is scheduled for
3、 publication in 2012. There will be no addendaissued to this Edition.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 athttp:/cstools.asme.org as they are issued.ASME
4、 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 assure that individuals from
5、competent 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-large.ASME does not “approve
6、,” “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 a standard against liab
7、ility forinfringement of any applicable letters patent, nor assume 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 responsibility.Participation by fede
8、ral 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 establishedASME procedures and policies,
9、 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 EngineersThree Park Avenue, New York, NY 1001
10、6-5990Copyright 2007 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-CONTENTSForeword ivCommittee Roster . vCorres
11、pondence With the B16 Committee vi1 Scope 12 PressureTemperature Ratings . 13 Material 14 Size 25 Marking 26 Flange Facing Finish. 27 Gaskets for Raised Face Flanges . 28 Pressure Taps. 29 Jack Screw Provision 210 Flange Dimensions 211 Flange Threads . 212 Tolerances 3Figures1 Corner Taps . 92 Angul
12、ar Meter Tap for RTJ Flanges . 93 Jack Bolts 9Tables1 Class 300 Orifice Flanges, Welding Neck, Slip-On and Threaded . 42 Class 600 Orifice Flanges, Welding Neck 53 Class 900 Orifice Flanges, Welding Neck 64 Class 1500 Orifice Flanges, Welding Neck 75 Class 2500 Orifice Flanges, Welding Neck 8Mandato
13、ry AppendicesI Dimensional Data for Classes 300, 600, 900, 1500, and 2500 Flanges inU.S. Customary Units 11II Dimensional Data for Class 400 Flanges in U.S. Customary Units . 17III References . 19Nonmandatory AppendixA Quality System Program . 20iiiCopyright ASME International Provided by IHS under
14、license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-FOREWORDAugust of 1956 marked the first recorded correspondence noting the lack of standardizationfor orifice flanges. There were, and still are, several codes for the performance and calibrationof o
15、rifice flanges, but there had been no standardization of the flanges themselves. Over theensuing 3 years, correspondence continued among the Instrument Society of America, AmericanGas Association, and the B16 Standards Committee.On December 3, 1959, Subcommittee 3 (now Subcommittee C) of B16 authori
16、zed the appoint-ment of a Task Force to undertake drafting of a standard. Although the initial work progressedsmoothly, a controversy developed over the standard size of taps to be specified for the flanges.This required many years to resolve. It was finally achieved in 1973 with the issuance of a d
17、raftfrom the Task Force. Comments and objections to this draft from members of Subcommittee Cwere resolved, and a redraft was approved by the Subcommittee late in 1974. The B16 StandardsCommittee was balloted in the spring of 1975 and approval was gained. Comments from B16members from the gas indust
18、ry requested that the Class 400 orifice flange be included, and theB16 Subcommittee C agreed to consider this for a possible addendum. The Standard was approvedby ANSI on August 15, 1975.On April 30, 1979, an addenda was issued, which added Class 400 flanges andMandatory Appendix II covering referen
19、ce documents and organizations.In 1982, American National Standards Committee B16 was reorganized as an ASME Committeeoperating under procedures accredited by ANSI. In the 1988 edition, figures were added toillustrate jack bolts and corner taps, metric units have been omitted, and references to othe
20、rstandards have been updated. Following approval by the B16 Main Committee and the ASMESupervisory Board, the Standard was approved as an American National Standard by ANSI onFebruary 18, 1988.In 1996, several revisions were made, including the addition of angular meter taps for ringjoint flanges in
21、 sizes not previously covered. Following approval by the B16 Main Committeeand the ASME Supervisory Board, the Standard was approved as an American National Standardby ANSI on November 6, 1996.This 2006 edition includes metric units as the primary reference units while maintaining U.S.Customary unit
22、s in either parenthetical or separate forms. Changes to dimensions and nomencla-ture follow that contained within the 2003 edition of ASME B16.5. This includes the change ofminimum flange thickness from C to tfand corrections for Y1and Y2. Class 400 remains in U.S.Customary tables in Mandatory Appen
23、dix II but is not given in the metric dimensional tables.There are numerous requirement clarifications and editorial revisions.Requests for interpretations or suggestions for revisions should be sent to the Secretary,B16 Committee, Three Park Avenue, New York, NY 10016-5990.This revision was approve
24、d by the American National Standards Institute on November 6, 2006.ivCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B16 COMMITTEEStandardization of Valves, Flanges, Fittings, and Gaskets(The
25、 following is the roster of the Committee at the time of approval of this Standard.)STANDARDS COMMITTEE OFFICERSN. R. Sonderegger, ChairM. L. Nayyar, Vice ChairU. DUrso, SecretarySTANDARDS COMMITTEE PERSONNELR. W. Barnes, Anric Enterprises, Inc.W. B. Bedesem, ExxonMobil Research and Engineering Co.D
26、. F. Buccicone, Elkhart Products Corp.M. A. Clark, Nibco, Inc.U. DUrso, The American Society of Mechanical EngineersC. E. Floren, Mueller Co.D. R. Frikken, Becht Engineering Co.G. G. Grills, U.S. Coast GuardM. L. Henderson, Forgital USAG. A. Jolly, Vogt Valves/FlowserveSUBCOMMITTEE CM. L. Nayyar, Ch
27、air, Bechtel Power Corp.U. DUrso, Secretary, The American Society of MechanicalEngineersA. Appleton, Alloy Stainless Products Co., Inc.W. B. Bedesem, ExxonMobil Research and Engineering Co.C. E. Davila, Crane ValvesB. Dennis, Kerkau ManufacturingJ. P. Ellenberger, RetiredD. R. Frikken, Becht Enginee
28、ring Co.M. L. Henderson, Forgital USAvM. Katcher, Haynes InternationalR. Koester, Honorary MemberW. N. McLean, Newco ValvesT. A. McMahon, Fisher Controls International, Inc.M. L. Nayyar, Bechtel Power Corp.J. D. Page, U.S. Regulatory CommissionR. A. Schmidt, Trinity-ladishH. R. Sonderegger, Anvil In
29、ternational, Inc.W. M. Stephan, Flexitallic LPT. F. Stroud, Ductile Iron Pipe Research AssociationD. A. Williams, Southern Company ServicesC. L. Henley, Black however, theyshould not contain proprietary names or information.Requests that are not in this format will be rewritten in this format by the
30、 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. Further, persons aggrieved by aninterpretation may
31、 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 meetings, whichare open to the public. Persons wishing to
32、 attend any meeting should contact the Secretary ofthe B16 Standards Committee.viCopyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B16.36-2006ORIFICE FLANGES1 SCOPE1.1 GeneralThis Standard cove
33、rs flanges (similar to those coveredin ASME B16.5) that have orifice pressure differentialconnections. Coverage is limited to the following:(a) welding neck flanges Classes 300, 600, 900, 1500,and 2500. U.S. Customary units are presented inMandatory Appendix I.(b) slip-on and threaded Class 300.(c)
34、welding neck flanges Class 400 in U.S. Customaryunits in Mandatory Appendix II.1.2 ReferencesCodes, standards, and specifications containing provi-sions to the extent referenced herein constitute require-ments of this Standard. These reference documents arelisted in Mandatory Appendix III.1.3 Qualit
35、y SystemsNonmandatory requirements relating to the productmanufacturers Quality System Program are describedin Nonmandatory Appendix A.1.4 Relevant UnitsThis Standard states values in both metric and U.S.Customary units. As an exception, diameter of bolts andflange bolt holes are expressed in inch u
36、nits only. Thesesystems of units are to be regarded separately as stan-dard. Within the text, the U.S. Customary units areshown in parentheses or in separate tables. The valuesstated in each system are not exact equivalents; there-fore, it is required that each system of units be usedindependently o
37、f the other. Except for diameter of boltsand flange bolt holes, combining values from the twosystems constitutes nonconformance with the standard.Except for Class 400 the values in U.S. Customary unitsare in Mandatory Appendix I. The main text of thisStandard does not contain requirements for Class
38、400welding neck flange; however, Mandatory Appendix IIdoes contain requirements for this class, expressed inU.S. Customary units only.1.5 ConventionFor the purposes of determining conformance withthis Standard, the convention for fixing significant digitswhere limits and maximum and minimum values a
39、respecified, shall be rounded as defined in ASTM Practice1E 29. This requires that an observed or calculated valueshall be rounded off to the nearest unit in the last right-hand digit used for expressing the limit. Decimal valuesand tolerances do not imply a particular method of mea-surements.1.6 De
40、notation1.6.1 Pressure Rating Designation(a) Class, followed by a dimensionless number, is thedesignation for pressuretemperature ratings as follows:Classes 300 600 900 1500 2500.(b) Class 400 is retained in the U.S. Customary tables.1.6.2 Sizes. NPS, followed by a dimensionlessnumber, is the design
41、ation for the nominal flange size.NPS is related to the reference nominal diameter, DN,used in international standards. The relationship is, typi-cally, as follows:NPS DN1251124025021265384 100GENERAL NOTE: For NPS 4, the related DNp25 (NPS).1.7 Service ConditionsCriteria for selection of materials
42、suitable for the par-ticular fluid service are not within the scope of thisStandard.2 PRESSURETEMPERATURE RATINGSThe pressuretemperature ratings, including all userecommendations and limitations, and the method ofrating given in ASME B16.5 apply to these flanges.3 MATERIAL3.1 GeneralFlange materials
43、 shall be in accordance with therequirements of ASME B16.5.3.2 BoltingBolting material recommendations are given inASME B16.5.Copyright ASME International Provided by IHS under license with ASME Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B16.36-20063.3 Pl
44、ugsPressure retaining plugs shall conform toASME B16.11, unless otherwise agreed between pur-chaser and manufacturer. Plug material shall be at leastas corrosion resistant as the corresponding flangematerial.4 SIZEOrifice flange sizes are indicated by the nominal pipesize to which they are attached.
45、 Only those listed inTables 1 through 5; Tables I-1 through I-5, andMandatory Appendix II are considered standard.5 MARKINGFlanges shall be marked as required in ASME B16.5.For welding neck flanges only, the bore diameter shallbe marked.6 FLANGE FACING FINISHThe finish of contact faces shall conform
46、 to the require-ments of ASME B16.5.7 GASKETS FOR RAISED FACE FLANGES7.1 Gasket ThicknessFlange dimensions are based on the use of 1.5 mm(0.06 in.) thick gaskets.7.2 Flange Gaskets Requiring Dimensional ChangesWhen the location of the pressure tap with respect tothe orifice plate is critical to the
47、service and meteringconditions, its location may be altered to accommodateother than 1.5 mm (0.06 in.) thick gaskets or ring typejoint gaskets whose thickness may vary from that listedin in Tables 2, 3, 4, and 5 or those listed in Tables I-2,I-3, I-4, and I-5 or Mandatory Appendix II.The alteration
48、of location may also be accomplishedby the removal of 2 mm (0.06 in.) from the raised faceof the flange. If an original 2 mm (0.06 in.) high raisedface is removed, the user is cautioned to limit the outsidediameter of the gasket or orifice plate to the tabulatedR dimension.8 PRESSURE TAPS8.1 General
49、Each orifice flange shall be provided with two pres-sure tap holes extending radially from the outside diam-eter of the flange to the inside diameter of the flange.Corner taps may be used on NPS 112and smaller ifspace permits. See Fig. 1.For ring joint flanges listed in Tables 2 through 5,Tables I-1 through I-5, and Mandatory Appendix II2where radial taps will interfere with t
