1、AN AMERICAN NATIONAL STANDARD ASME B16.48-2015(Revision of ASME B16.48-2010)Line BlanksASME B16.48-2015(Revision of ASME B16.48-2010)Line BlanksAN AMERICAN NATIONAL STANDARDTwo Park Avenue New York, NY 10016 USADate of Issuance: December 29, 2015The next edition of this Standard is scheduled for pub
2、lication 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 Cases. Casesand interpretations are published on the ASME Web site under the Committee Pages at http:/
3、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 or grammatical errorsin codes and standards. Such errata shall be used on the date posted.
4、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 “PublicationInfo
5、rmation” 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 to assure
6、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-at-large.A
7、SME 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 utilizing a
8、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 responsibility
9、.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 establishedASME pr
10、ocedures 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 Park Avenu
11、e, 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 24 Design 25 Dimension
12、s 26 Materials 37 Marking . 38 Paddle Blank and Spacer Identification 39 Testing 3Figure1 Line Blanks 1Tables1 Dimensions of Class 150 Blanks for Use With Raised Face Flanges . 42 Dimensions of Class 300 Blanks for Use With Raised Face Flanges . 53 Dimensions of Class 600 Blanks for Use With Raised
13、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 2500 Blanks for Use With Raised Face Flanges 97 Dimensions of Class 150 Female Ring-Joint Facing Figure-8 Blanks . 108 Dimens
14、ions 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-Joint Facing Figure-8 Blanks . 1311 Dimensions of Class 1500 Female Ring-Joint Facing Figure-8 Blanks 1412 Dimensions of Class
15、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-8 Blanks . 1715 Dimensions of Class 600 Male Ring-Joint Facing Figure-8 Blanks . 1816 Dimensions of Class 900 Male Ring-Joint
16、 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 AppendicesI Dimensional Data for Line Blanks in U.S. Customary Units 23II References 42Nonmandatory AppendixA Quality System
17、 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. The American Petroleum Instituteno longer publishes the API 590 Standard.These line blanks were designed in accordance with the
18、 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 included reference to the use of allmaterials listed in B16.5 Table 1A plus Metric units. The added materials of construction incl
19、udedadditions 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 (in parentheses) andMetric units in the text, Metric units in dimensional tables in the body, and U.S. Customary unitsin dime
20、nsional tables in Nonmandatory Appendix A.Following the approval of the Standards Committee and ASME, approval for the 2005 editionwas granted by the American National Standards Institute (ANSI) on September 19, 2005.The 2010 edition included revisions to paragraph numbering and adjustments of appen
21、dices.In addition to renumbering of main text, updates were made to the Materials section and MarkingMethod. Illustrations for the figure-8 blanks for raised face flange joints were revised. Finally,the tables for male ring-joint facing figure-8 blanks were revised to support both oval and octagonal
22、ring shapes.The 2015 edition includes revisions to paragraph numbering, and updates have been made tothe Materials and Thickness Tolerances sections. Tables for class 300 male oval ring-joint figure-8 blanks have been updated for thickness.All requests for interpretations or suggestions for revision
23、s should be sent to the Secretary,B16 Committee, The American Society of Mechanical Engineers, Two Park Avenue, New York,NY 10016-5990.The B16 Committee operates under procedures accredited by ANSI. Following approval bythe Standards Committee and ASME, this revision to the 2010 edition was approved
24、 as anAmerican National Standard by ANSI on September 18, 2015, with the designationASME B16.48-2015.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. B. B
25、edesem, ChairG. A. Jolly, Vice ChairC. E. OBrien, SecretarySTANDARDS 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.Requ
26、ests that are not in this format may be rewritten in the 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
27、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 Meetings. The B16 Standards C
28、ommittee regularly holds meetings and/or telephone conferences that are open to the public. Persons wishing to attend any meetingand/or telephone conference should contact the Secretary of the B16 Standards Committee.viASME B16.48-2015SUMMARY OF CHANGESFollowing approval by the ASME B16 Committee, a
29、nd after public review, ASME B16.48-2015was approved by the American National Standards Institute on September 18, 2015.ASME B16.48-2015 contains editorial changes, revisions, and corrections identified by a marginnote, (15), placed next to the affected area.Page Location Change1 2.4 Editorially rev
30、ised2.5 Editorially revised2 5.2.2 Data reformatted3 6.1 Revised17 Table 14 Under “Thickness, t,” ninth entry revised37 Table I-14 Under “Thickness, t,” ninth entry revisedviiINTENTIONALLY LEFT BLANKviiiASME B16.48-2015LINE BLANKS1 SCOPEThis Standard covers pressuretemperature ratings,materials, dim
31、ensions, tolerances, marking, and testingfor operating line blanks in sizes NPS12through 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 pres
32、sure-retaining plate with onesolid end and one open end connected with a web ortie 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 Spac
33、er. A paddle spacer is similar tothe open end of a figure-8 blank. It has a plain radialhandle. It is generally used in conjunction with a paddleblank.Fig. 1 Line Blanks(a) Figure-8 Blank (b) Paddle Blank (c) Paddle Spacer12.2 ReferencesCodes, standards, and specifications, containing pro-visions to
34、 the extent referenced herein, constituterequirements of this Standard. These reference docu-ments are listed in Mandatory Appendix II.2.3 Quality SystemsNonmandatory requirements relating to the productmanufacturers Quality System Program are describedin Nonmandatory Appendix A.2.4 Relevant UnitsTh
35、is Standard states values in both SI (Metric) andU.S. Customary units. These systems of units are to beregarded separately as standard. Within the text, theU.S. Customary units are shown in parentheses or inseparate tables that appear in Mandatory Appendix I.The values stated in each system are not
36、exact equiva-lents; therefore, it is required that each system of unitsbe used independently of the other. Combining valuesfrom the two systems constitutes nonconformance withthe Standard.2.5 ConventionFor determining conformance with this Standard, theconvention for fixing significant digits where
37、limits(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 values and tolerances do not imply a particularmethod of measurement
38、.2.6 SizeNPS, followed by a dimensionless number, is the 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 100GENERAL NOTE: For NPS 4, the related DN p 25 m
39、ultipliedby the NPS number.(15)(15)ASME B16.48-20152.7 Service ConditionsCriteria for selection of materials suitable 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 p
40、ressure classes: 150, 300, 600, 900, 1500, and2500 as listed in ASME B16.5.3.2 PressureTemperature Ratings3.2.1 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
41、tempera-tures, linear interpolation between temperatures withina pressure class is permitted by ASME B16.5.3.2.2 System Pressure Testing. Line blanks may besubjected to system tests at a pressure not to exceed1.5 times the 38C (100F) rating rounded off to the nexthigher 1 bar (25 psi) increment. Tes
42、ting at any higherpressure 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 pressuretemperature rating, the rat-ing
43、of the assembled joint 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 s
44、pacer in all orientations without permanent defor-mation to the web.4.2 Edge PreparationIn addition to machining, flame, plasma, saw cutting,and press punching are acceptable methods for formingthe inside and outside diameters of line blanks. Surfacesshall be free of projections that would interfere
45、 withgasket seating.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 sha
46、ll be in2addition to the thicknesses, t, listed in Tables 1 through 6(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 t
47、he gasket contact faces 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 roughne
48、ss. The finish of the 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).5.2 Tol
49、erances5.2.1 Facing Tolerances. Tolerances for facings shallbe in accordance with ASME B16.5.5.2.2 Thickness Tolerances. Thickness tolerancesareSize Tolerance, mm (in.)NPS 18 +3.0, 0.0 (+0.12, 0.00)NPS 20 +4.8, 0.0 (+0.19, 0.00)5.3 Openings(a) For NPS12, NPS34, and NPS 1 blanks in all raisedface classes, the inside diameter is equal to standardweight welding neck flange bore.(b) For NPS 114and larger blanks in Classes 150 and300 raised face, the inside diameter is equal to the pipeoutside diameter.(c) For NPS 114and larger blanks in Classes 600 and900 raise
