1、AN AMERICAN NATIONAL STANDARD ASME B16.36-2015(Revision of ASME B16.36-2009)Orifice FlangesASME B16.36-2015(Revision of ASME B16.36-2009)Orifice FlangesAN AMERICAN NATIONAL STANDARDTwo Park Avenue New York, NY 10016 USADate of Issuance: July 15, 2015The next edition of this Standard is scheduled for
2、 publication in 2020.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard. Periodically certain actions of the ASME B16 Committee may be published as Code Cases.Code Cases and interpretations are published on the ASME Web site under the Committee P
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11、wo Park Avenue, New York, NY 10016-5990Copyright 2015 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword ivCommittee Roster . vCorrespondence With the B16 Committee viSummary of Changes vii1 Scope . 12 General . 13 PressureTemperature Ratings 14 Materi
12、al . 15 Size. 26 Marking . 27 Flange Facing Finish . 28 Gaskets for Raised Face Flanges 29 Pressure Taps 210 Jack Screw Provision . 211 Flange Dimensions . 312 Flange Threads 313 Tolerances. 3Figures1 Corner Taps 42 Angular Meter Tap for RTJ Flanges . 43 Jack Bolts 4Tables1 Class 300 Orifice Flanges
13、, Welding Neck, Threaded, and Slip-On . 52 Class 600 Orifice Flanges, Welding Neck 63 Class 900 Orifice Flanges, Welding Neck 74 Class 1500 Orifice Flanges, Welding Neck . 85 Class 2500 Orifice Flanges, Welding Neck . 9Mandatory AppendicesI Dimensional Data for Classes 300, 600, 900, 1500, and 2500
14、Flanges inU.S. Customary Units 11II Dimensional Data for Class 400 Flanges in U.S. Customary Units 17III References 19Nonmandatory AppendixA Quality System Program 20iiiFOREWORDAugust of 1956 marked the first recorded correspondence noting the lack of standardizationfor orifice flanges. There were,
15、and still are, several codes for the performance and calibrationof orifice 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
16、December 3, 1959, Subcommittee 3 (now Subcommittee C) of B16 authorized 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
17、to resolve. It was finally achieved in 1973 with the issuance of a draftfrom 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 a
18、nd approval was gained. Comments from B16members from the gas industry 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, whi
19、ch added Class 400 flanges andMandatory Appendix II covering reference 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
20、 corner taps, metric units were omitted, and references to other standardswere updated. Following approval by the B16 Main Committee and the ASME Supervisory Board,the Standard was approved as an American National Standard by ANSI on February 18, 1988.In 1996, several revisions were made, including
21、the addition of angular meter taps for ringjoint flanges in 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.In 2006, several revisions were made, including
22、the use of metric units as the primary referenceunits, while maintaining U.S. Customary units in either parenthetical or separate forms. Changesto dimensions and nomenclature followed that were contained within the 2003 edition ofASME B16.5. This includes the change of minimum flange thickness from
23、C to tfand correctionsfor Y1and Y2. Class 400 remains in U.S. Customary tables in Mandatory Appendix II, but is notgiven in the metric dimensional tables. There were numerous requirement clarifications andeditorial revisions. Following the approvals of the Standards Committee and ASME, approvalfor t
24、he new edition was granted by the American National Standards Institute on November6, 2006.In the 2009 edition, Mandatory Appendix III was revised and updated. Also, section 4, thematerials section, was revised to cover requirements of material specification editions other thanthose listed in Mandat
25、ory Appendix III of ASME B16.5.Requests for interpretations or suggestions for revisions should be sent to the Secretary,B16 Committee, Two Park Avenue, New York, NY 10016-5990. As an alternative, inquiries maybe submitted via e-mail to: SecretaryB16asme.org.This revision was approved by the America
26、n National Standards Institute on February 24, 2015.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. Bedesem, ChairG. Jolly, Vice ChairC. E. OBrien, Secre
27、tarySTANDARDS COMMITTEE PERSONNELA. Appleton, Alloy Stainless Products Co., Inc.R. W. Barnes, Anric Enterprises, Inc.W. B. Bedesem, ConsultantR. Bojarczuk, ExxonMobil Research however, they shouldnot contain proprietary names or information.Requests that are not in this format may be rewritten in th
28、e appropriate format by the Committeeprior to 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 aggrie
29、ved 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 meetings thatare open to the p
30、ublic. Persons wishing to attend any meeting should contact the Secretary ofthe B16 Standards Committee.viASME B16.36-2015SUMMARY OF CHANGESFollowing approval by the B16 Committee and ASME, and after public review, ASME B16.36-2015was approved by the American National Standards Institute on February
31、 24, 2015.ASME B16.36-2015 includes editorial changes, revisions, and corrections, which are identified bya margin designator, (15), placed next to the affected area.Page Location Change1 1 First paragraph revised2.4 Revised4.1 Revised4 Table 1 In illustration and throughout table,“weld” revised to
32、read “welding”5 Table 2 In General Note (b), “weld” revised toread “welding”12 Table I-1 In illustration and throughout table,“weld” revised to read “welding”13 Table I-2 In General Note (b), “weld” revised toread “welding”viiINTENTIONALLY LEFT BLANKviii(15)(15)ASME B16.36-2015ORIFICE FLANGES1 SCOPE
33、This Standard covers pressure-temperature ratings,materials, dimensions, tolerances, testing, and makingof flanges (similar to those covered in ASME B16.5) thathave orifice pressure differential connections. Coverageis limited to the following:(a) welding neck flanges Classes 300, 600, 900, 1500,and
34、 2500. U.S. Customary units are presented inMandatory Appendix I.(b) slip-on and threaded Class 300.(c) welding neck flanges Class 400 in U.S. Customaryunits in Mandatory Appendix II.2 GENERAL2.1 ReferencesCodes, standards, and specifications containing provi-sions to the extent referenced herein co
35、nstitute require-ments of this Standard. These reference documents arelisted in Mandatory Appendix III.2.2 Quality SystemsNonmandatory requirements relating to the productmanufacturers Quality System Program are describedin Nonmandatory Appendix A.2.3 Relevant UnitsThis Standard states values in bot
36、h SI (Metric) andU.S. Customary units. As an exception, diameter of boltsand flange bolt holes are expressed in inch units only.These systems of units are to be regarded separately asstandard. Within the text, the U.S. Customary units areshown in parentheses or in separate tables. The valuesstated i
37、n each system are not exact equivalents; therefore,it is required that each system of units be used indepen-dently of the other. Except for diameter of bolts andflange bolt holes, combining values from the two sys-tems constitutes nonconformance with the Standard.Except for Class 400, the values in
38、U.S. Customary unitsare in Mandatory Appendix I. The main text of thisStandard does not contain requirements for Class 400welding neck flanges; however, Mandatory Appendix IIdoes contain requirements for this class, expressed inU.S. Customary units only.2.4 ConventionFor determining conformance with
39、 this Standard, theconvention for fixing significant digits where limits1(maximum and minimum values) are specified, shall beas defined in ASTM E29. This requires that an observedor calculated value be rounded off to the nearest unitin the last right-hand digit used for expressing the limit.Decimal
40、values and tolerances do not imply a particularmethod of measurement.2.5 Denotation2.5.1 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. Customar
41、y tables.2.5.2 Sizes. NPS, followed by a dimensionlessnumber, is the designation 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 rel
42、ated DNp25 H11547 (NPS).2.6 Service ConditionsCriteria for selection of materials suitable for the par-ticular fluid service are not within the scope of thisStandard.3 PRESSURETEMPERATURE RATINGSThe pressuretemperature ratings, including all userecommendations and limitations, and the method ofratin
43、g given in ASME B16.5 apply to these flanges.4 MATERIAL4.1 General(a) Flange materials shall be in accordance with therequirements of ASME B16.5. Flanges shall be manufac-tured as one piece in accordance with the applicablematerials specification. Assembly of multiple pieces intothe finished product
44、 by welding or other means is notpermitted by this Standard.(15)ASME B16.36-2015(b) For materials manufactured to editions of thematerial specification other than those listed inMandatory Appendix III of ASME B16.5, refer topara. 4.3.4.2 BoltingBolting material recommendations are given inASME B16.5
45、. For materials manufactured to editionsof the material specification other than those listed inMandatory Appendix III of ASME B16.5, refer topara. 4.3.4.3 Materials Manufactured to Other EditionsMaterials may meet the requirements of material spec-ification editions other than those listed in Manda
46、toryAppendix III of ASME B16.5, provided(a) the materials are the same specification, e.g.,grade, type, class, or alloy, and heat-treated conditions,as applicable(b) the flange manufacturer certifies that the require-ments of the edition of the specification listed inMandatory Appendix III of ASME B
47、16.5 have been met4.4 PlugsPressure-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.5 SIZEOrifice flange sizes are indicated by the nominal pipesize to
48、which they are attached. Only those listed inTables 1 through 5, Tables I-1 through I-5, andMandatory Appendix II are considered standard.6 MARKINGFlanges shall be marked as required in ASME B16.5.For welding neck flanges only, the bore diameter shallbe marked.7 FLANGE FACING FINISHThe finish of con
49、tact faces shall conform to the require-ments of ASME B16.5.8 GASKETS FOR RAISED FACE FLANGES8.1 Gasket ThicknessFlange dimensions are based on the use of 1.5 mm(0.06 in.) thick gaskets.8.2 Flange Gaskets Requiring Dimensional ChangesWhen the location of the pressure tap with respect tothe orifice plate is critical to the service and metering2conditions, 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 Tables 2 through 5 or those listed in Tables I-2 throughI-5 or Mandat
