1、AN AMERICAN NATIONAL STANDARDASME B16.48-2010(Revision of ASME B16.48-2005)Line BlanksINTENTIONALLY LEFT BLANKASME B16.48-2010(Revision of ASME B16.48-2005)Line BlanksAN AMERICAN NATIONAL STANDARDThree Park Avenue New York, NY 10016 USADate of Issuance: October 14, 2010The next edition of this Stand
2、ard is scheduled for publication in 2015. 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
3、they are issued.Items issued as errata to this edition are published on the ASME Web site under the CommitteePages at http:/cstools.asme.org.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the
4、 criteria for American NationalStandards. The Standards Committee that approved the code or standard was balanced to ensure that individuals fromcompetent and concerned interests have had an opportunity to participate. The proposed code or standard was madeavailable for public review and comment tha
5、t 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.ASME does not take any position with respect to the validity of any patent
6、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 assume any such liability. Users of a code or standard are expresslyadvised that determination o
7、f 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 interpreted asgovernment or industry endorsement of this code or standard.AS
8、ME 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 document may be reproduced in any form,in an electronic retrieval system or
9、otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue, New York, NY 10016-5990Copyright 2010 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword ivCommittee Roster . vCorrespondence
10、 With the B16 Committee viSummary of Changes vii1 Scope . 12 General . 13 Pressure-Temperature Ratings 14 Design 25 Dimensions 26 Materials 37 Marking . 38 Paddle Blank and Spacer Identification 39 Testing 3Figure1 Line Blanks 2Tables1 Dimensions of Class 150 Blanks for Use With Raised Face Flanges
11、. 42 Dimensions of Class 300 Blanks for Use With Raised Face Flanges . 53 Dimensions of Class 600 Blanks for Use With Raised Face Flanges . 64 Dimensions of Class 900 Blanks for Use With Raised Face Flanges . 75 Dimensions of Class 1500 Blanks for Use With Raised Face Flanges 86 Dimensions of Class
12、2500 Blanks for Use With Raised Face Flanges 97 Dimensions of Class 150 Female Ring-Joint Facing Figure-8 Blanks . 108 Dimensions of Class 300 Female Ring-Joint Facing Figure-8 Blanks . 119 Dimensions of Class 600 Female Ring-Joint Facing Figure-8 Blanks . 1210 Dimensions of Class 900 Female Ring-Jo
13、int Facing Figure-8 Blanks . 1311 Dimensions of Class 1500 Female Ring-Joint Facing Figure-8 Blanks 1412 Dimensions of Class 2500 Female Ring-Joint Facing Figure-8 Blanks 1513 Dimensions of Class 150 Male Ring-Joint Facing Figure-8 Blanks . 1614 Dimensions of Class 300 Male Ring-Joint Facing Figure-
14、8 Blanks . 1715 Dimensions of Class 600 Male Ring-Joint Facing Figure-8 Blanks . 1816 Dimensions of Class 900 Male Ring-Joint Facing Figure-8 Blanks . 1917 Dimensions of Class 1500 Male Ring-Joint Facing Figure-8 Blanks 2018 Dimensions of Class 2500 Male Ring-Joint Facing Figure-8 Blanks 21Mandatory
15、 AppendicesI Dimensional Data for Line Blanks in U.S. Customary Units 23II References 42Nonmandatory AppendixA Quality System Program 43iiiFOREWORDIn July 1993, the ASME B16 Committee gave to its Subcommittee C the assignment to convertthe API 590 Steel Line Blanks Standard into an ASME standard. Th
16、e American Petroleum Instituteno longer publishes the API 590 Standard.These line blanks were designed in accordance with the rules of the ASME B31.3-2002 edition.Materials and relevant footnotes have been added following the ASME format.Significant additions were made to the 2005 edition that inclu
17、ded reference to the use of allmaterials listed in B16.5 Table 1-A plus Metric units. The added materials of construction includedadditions to classes of alloy steels, stainless steels, and nickel alloys. The 2005 edition was alsometricated over previous editions to include both U.S. Customary units
18、 (in parenthesis) andMetric units in the text, Metric units in dimensional tables in the body, and U.S. Customary unitsin dimensional tables in Nonmandatory Appendix A.Following the approval of the Standards Committee and ASME, approval for the 2005 editionwas granted by the American National Standa
19、rds Institute on September 19, 2005.The 2010 edition includes revisions to paragraph numbering and adjustments of appendices.In addition to renumbering of main text, updates have been made to the Materials section andMarking Method. Illustrations for the figure-8 blanks for raised face flange joints
20、 have beenrevised. Finally, the tables for male ring-joint facing figure-8 blanks were revised to support bothoval and octagonal ring shapes.All requests for interpretations or suggestions for revisions should be sent to the Secretary,B16 Committee, The American Society of Mechanical Engineers, Thre
21、e Park Avenue, New York,NY 10016-5990.The B16 Committee operates under procedures accredited by the American National StandardsInstitute (ANSI). Following approval by the Standards Committee and ASME, this revision tothe 2005 edition was approved as an American National Standard by ANSI on September
22、 2, 2010with the designation ASME B16.48-2010.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. B. Bedesem, ChairM. L. Nayyar, Vice ChairD. R. Sharp, Secre
23、tarySTANDARDS COMMITTEE PERSONNELR. W. Barnes, Anric Enterprises, Inc.W. B. Bedesem, ConsultantD. F. Buccicone, Elkhart Products Corp.A. M. Cheta, Royal Dutch ShellM. A. Clark, Nibco, Inc.G. A. Cuccio, Capitol Manufacturing Co.C. E. Davila, Crane Energy Flow SolutionsD. R. Frikken, Becht Engineering
24、 Co.R. P. Griffiths, U.S. Coast GuardM. L. Henderson, Tiec, Inc.G. A. Jolly, Vogt Valves/FlowserveSUBCOMMITTEECSTEEL FLANGES AND FLANGED FITTINGSC. E. Davila, Chair, Crane Energy Flow SolutionsA. P. Maslowski, Secretary, The American Society of MechanicalEngineersA. Appleton, Alloy Stainless Product
25、s Co., Inc.W. B. Bedesem, ConsultantW. J. Birkholz, Flowline Division, Markovitz Enterprises, Inc.A. M. Cheta, Royal Dutch ShellB. Dennis, Kerkau ManufacturingJ. P. Ellenberger, ConsultantD. R. Frikken, Becht Engineering Co.M. L. Henderson, Tiec, Inc.C. L. Henley, Black however, they shouldnot conta
26、in proprietary names or information.Requests that are not in this format will be rewritten in this format by the 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 additional
27、information that might affect an interpretation is available. Further, persons aggrieved 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
28、 Meetings. The B16 Standards Committee regularly holds meetings, whichare open to the public. Persons wishing to attend any meeting should contact the Secretary ofthe B16 Standards Committee.viASME B16.48-2010SUMMARY OF CHANGESFollowing approval by the ASME B16 Standards Committee, and after public
29、review,ASME B16.48-2010 was approved by the American National Standards Institute onSeptember 2, 2010.In this 2010 edition, all paragraphs have been redesignated, all tables have been revised, andcross-references have been updated throughout. All other revisions introduced within the 2010edition of
30、ASME B16.48 are identified by a margin note, (10).Page Location Change2 4.2 Revised in its entirety4.3.1 Revised3 6.1 Last sentence added6.2 Revised in its entirety7.2 Revised in its entirety23 Mandatory Appendix I Former Nonmandatory Appendix Aredesignated42 Mandatory Appendix II Former Nonmandator
31、y Appendix Bredesignated43 Nonmandatory Former Nonmandatory Appendix CAppendix A redesignatedviiINTENTIONALLY LEFT BLANKviiiASME B16.48-2010LINE BLANKS1 SCOPEThis Standard covers pressuretemperature ratings,materials, dimensions, tolerances, marking, and testingfor operating line blanks in sizes NPS
32、12through NPS 24for installation between ASME B16.5 flanges in the 150,300, 600, 900, 1500, and 2500 pressure classes.2 GENERAL2.1 Definitions2.1.1 Figure-8 Blank. A figure-8 blank (also calleda spectacle blank) is a pressure-retaining plate with onesolid end and one open end connected with a web or
33、tie bar (see Fig. 1).2.1.2 Paddle Blank. A paddle blank is similar tothe solid end of a figure-8 blank. It has a plain radialhandle. It is generally used in conjunction with a paddlespacer in large sizes.2.1.3 Paddle Spacer. A paddle spacer is similar tothe open end of a figure-8 blank. It has a pla
34、in radialhandle. It is generally used in conjunction with a paddleblank.2.2 ReferencesCodes, standards, and specifications, containing pro-visions to the extent referenced herein, constituterequirements of this Standard. These reference docu-ments are listed in Mandatory Appendix II.2.3 Quality Syst
35、emsNonmandatory requirements relating to the productmanufacturers Quality System Program are describedin Nonmandatory Appendix A.2.4 Relevant UnitsThis Standard states values in both Metric andU.S. Customary units. These systems of units are to beregarded separately as standard. Within the text, the
36、U.S. Customary units are shown in parenthesis or sepa-rate tables. Refer to Mandatory Appendix I. The valuesstated in each system are not exact equivalents; therefore,it is required that each system of units be used indepen-dently of the other. Combining values from the twosystems constitutes noncon
37、formance with the Standard.Mandatory Appendix I provides dimensions inU.S. Customary units.12.5 ConventionFor the purpose of determining conformance withthis Standard, the convention for fixing significant digitswhere limits and maximum and minimum values arespecified, shall be rounded as defined in
38、ASTM Practice E 29. This requires that an observed orcalculated value shall be rounded off to the nearest unitin the last right-hand digit used for expressing the limit.Decimal values and tolerances do not imply a particularmethod of measurement.2.6 SizeNPS, followed by a dimensionless number, is th
39、e des-ignation for nominal blank size. NPS is related to thereference nominal diameter, DN, as defined in ISO 6708.The relationship is typically as follows:NPS DN121534201251143211240250212653804 100NOTE: For NPS 4, the related DN p 25(NPS).2.7 Service ConditionsCriteria for selection of materials s
40、uitable for particu-lar fluid service are not within the scope of this Standard.3 PRESSURETEMPERATURE RATINGS3.1 Pressure ClassesLine blanks covered by this Standard are for the fol-lowing pressure classes: 150, 300, 600, 900, 1500, and2500 as listed in ASME B16.5.3.2 PressureTemperature Ratings3.2.
41、1 Ratings. Ratings are the maximum allowableworking gage pressure at the temperature shown inTables 2 and II-2 of ASME B16.5 for the appropriatematerial and pressure class. For intermediate tempera-tures, linear interpolation between temperatures withina pressure class is permitted by ASME B16.5.3.2
42、.2 System Pressure Testing. Line blanks may besubjected to system tests at a pressure not to exceed(10)ASME B16.48-2010Fig. 1 Line Blanks(a) Figure-8 Blank(b) Paddle Blank(c) Paddle Spacer1.5 times the 38C (100F) rating rounded off to the nexthigher 1 bar (25 psi) increment. Testing at any higherpre
43、ssure is the responsibility of the user, taking intoaccount the requirements of the applicable code orregulation.3.2.3 Mixed Material Joints. Should either the twoflanges or the line blank in a flanged line blank assemblynot have the same pressure-temperature rating, the rat-ing of the assembled joi
44、nt at any temperature shall bethe lower of the flange or line blank rating at thattemperature.4 DESIGN4.1 HandleThe handle or web (tie bar) may be integral or attachedto the line blank or spacer. The web and its attachmentshall be capable of supporting the weight of the blankor spacer in all orienta
45、tions without permanent defor-mation to the web.4.2 Edge PreparationIn addition to machining, flame, plasma, saw cutting,or press punching are acceptable methods for formingthe inside and outside diameters of line blanks. Surfacesshall be free of projections that would interfere withgasket seating.2
46、4.3 Facing4.3.1 Raised Face Joint Blanks. The gasket seatingsurface and dimensions for line blanks used with raisedface flanges shall be in accordance with ASME B16.5. Araised face may be specified for these blanks at the optionof the purchaser. The height of the raised faces shall bein addition to
47、the thicknesses, t, listed in Tables 1 through6 (Tables I-1 through I-6 in Mandatory Appendix I).4.3.2 Female Ring-Joint Blanks. Female ring-jointgrooves shall be shaped with the groove side wall sur-face finish not exceeding 1.6 H9262m (63 H9262in.) Ra roughness.The finish of the gasket contact fac
48、es shall be judged byvisual comparison with Ra standards (see ASME B46.1)and not by instruments having stylus tracers and elec-tronic amplification.4.3.3 Male Ring-Joint Blanks. The gasket shape(ring) for male ring-joint blanks shall not exceed 1.6 H9262m(63 H9262in.) Ra roughness. The finish of the
49、 gasket contactfaces shall be judged by visual comparison with Rastandards (see ASME B46.1) and not by instrumentshaving stylus tracers and electronic amplification.5 DIMENSIONS5.1 GeneralDimensions shall be in accordance with Tables 1through 18 (Tables I-1 through I-18 of MandatoryAppendix I).5.2 Tolerances5.2.1 Facing Tolerances. Tolerances for facings shallbe in accordance with ASME B16.5.5.2.2 Thickness Tolerances. Thickness tolerancesareNPS 18 and smaller zero + 3.0 mm (0.12 in.)NPS 20 and larger zero + 4.8 mm (0.19 in.)5.3 Openings(a) For NPS12, NPS34, and NPS
