ASME B16.48-2005钢制管线盲板(英文版)

Line Blanks A N A M E R I C A N N A T I O N A L S T A N D A R D
Line Blanks
A N A M E R I C A N N A T I O N A L S T A N D A R D
Three Park Avenue • New York, NY 10016
Date of Issuance:January16,2006
The next edition of this Standard is scheduled for publication in2010.There will be no addenda or written interpretations of the requirements of this Standard issued to this edition.
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CONTENTS
Foreword (iv)
Committee Roster (v)
1Scope (1)
2Pressure-Temperature Ratings (1)
3Design (2)
4Dimensions (2)
5Materials (3)
6Marking (3)
7Paddle Blank and Spacer Identification (3)
8Testing (3)
Figure
1Line Blanks (2)
Tables
1Dimensions of Class150Raised Face Figure-8Blanks (4)
2Dimensions of Class300Raised Face Figure-8Blanks (5)
3Dimensions of Class600Raised Face Figure-8Blanks (6)
4Dimensions of Class900Raised Face Figure-8Blanks (7)
5Dimensions of Class1500Raised Face Figure-8Blanks (8)
6Dimensions of Class2500Raised Face Figure-8Blanks (9)
7Dimensions of Class150Female Ring-Joint Facing Figure-8Blanks (10)
8Dimensions of Class300Female Ring-Joint Facing Figure-8Blanks (11)
9Dimensions of Class600Female Ring-Joint Facing Figure-8Blanks (12)
10Dimensions of Class900Female Ring-Joint Facing Figure-8Blanks (13)
11Dimensions of Class1500Female Ring-Joint Facing Figure-8Blanks (14)
12Dimensions of Class2500Female Ring-Joint Facing Figure-8Blanks (15)
13Dimensions of Class150Male Oval Ring-Joint Facing Figure-8Blanks (16)
14Dimensions of Class300Male Oval Ring-Joint Facing Figure-8Blanks (17)
15Dimensions of Class600Male Oval Ring-Joint Facing Figure-8Blanks (18)
16Dimensions of Class900Male Oval Ring-Joint Facing Figure-8Blanks (19)
17Dimensions of Class1500Male Oval Ring-Joint Facing Figure-8Blanks (20)
18Dimensions of Class2500Male Oval Ring-Joint Facing Figure-8Blanks (21)
Nonmandatory Appendices
A Dimensional Data for Line Blanks in U.S.Customary Units (22)
B References (41)
C Quality System Program (42)
iii
FOREWORD
In July1993,the ASME B16Committee gave to its Subcommittee C the assignment to convert the API590Steel Line Blanks Standard into an ASME standard.The American Petroleum Institute no longer publishes the API590Standard.
These line blanks were designed in accordance with the rules of the ASME B31.3-2002edition. Materials and relevant footnotes have been added following the ASME format.
Significant additions made to this2005edition include reference to the use of all materials listed in B16.5Table1-A plus Metric units.The added materials of construction include additions to classes of alloy steels,stainless steels,and nickel alloys.This edition has also been metricated over previous editions to include both U.S.Customary units(in parenthesis)and Metric units in the text,Metric units in dimensional tables in the body,and U.S.Customary units in dimensional tables in Nonmandatory Annex A.
All requests for interpretations or suggestions for revisions should be sent to the Secretary, B16Committee,The American Society of Mechanical Engineers,Three Park Avenue,New York, NY10016-5990.
The B16Committee operates under procedures accredited by the American National Standards Institute(ANSI).Following approval by the Standards Committee and ASME,this revision to the1997edition was approved as an American National Standard by ANSI on September19, 2005with the designation ASME B16.48-2005.
iv
ASME B16COMMITTEE Standardization of Valves,Flanges,Fittings,and Gaskets
(The following is the roster of the Committee at the time of approval of this Standard.)
OFFICERS
W.N.McLean,Chair R.A.Schmidt,Vice Chair C.Artibee,Secretary
COMMITTEE PERSONNEL
R.W.Barnes,Anric Enterprises,Inc.
W.B.Bedesem,ExxonMobil Research and Engineering Co.M.A.Clark,Nibco,Inc.C.E.Floren,Mueller Co.
D.R.Frikken,Becht Engineering Co.G.G.Grills,U.S.Coast Guard A.Hamilton,ABS Americas M.L.Henderson,Forgital USA G.A.Jolly,Vogt Valves/Flowserve M.Katcher,Haynes International R.Koester,Honorary Member
SUBCOMMITTEE C
D.R.Frikken,Chair,Becht Engineering Co.
C.Artibee,Secretary,The American Society of Mechanical Engineers
V.C.Bhasin,Sigmatech G.D.Conlee,Consultant W.C.Farrell,Jr.,Consultant M.L.Henderson,Coffer Corp.R.E.Johnson,Flowline Division
v
W.N.McLean,Newco Valves
T.A.McMahon,Fisher Controls International,Inc.M.L.Nayyar,Bechtel Power Corp.
J.D.Page,U.S.Regulatory Commission
P .A.Reddington,The American Society of Mechanical Engineers R.A.Schmidt,Trinity-ladish
H.R.Sonderegger,Anvil International,Inc.W.M.Stephan,Flexitallic LP
T.F.Stroud,Ductile Iron Pipe Research Association R.E.White,Richard E.White &Associates PC D.A.Williams,Southern Company Services
R.Koester,Honorary Member W.N.McLean,Newco Valves
M.L.Nayyar,Bechtel Power Corp.R.A.Schmidt,Trinity-ladish D.L.Shira,Taylor Forge
J.C.Thompson,Milwaukee Valve L.A.Willis,Dow Chemical Co.
vi
ASME B16.48-2005 LINE BLANKS
1SCOPE
1.1General
This Standard covers pressure-temperature ratings, materials,dimensions,tolerances,marking,and testing for operating line blanks in sizes NPS1⁄2through NPS24 for installation between ASME B16.5flanges in the150, 300,600,900,1500,and2500pressure classes.
1.2Definitions
1.2.1Figure-8Blank.A figure-8blank(also called a spectacle blank)is a pressure-retaining plate with one solid end and one open end connected with a web or tie bar(see Fig.1).
1.2.2Paddle Blank.A paddle blank is similar to the solid end of a figure-8blank.It has a plain radial handle.
It is generally used in conjunction with a paddle spacer
in large sizes.
1.2.3Paddle Spacer.A paddle spacer is similar to the open end of a figure-8blank.It has a plain radial handle.It is generally used in conjunction with a paddle blank.
1.3References
Codes,standards,and specifications,containing pro-visions to the extent referenced herein,constitute requirements of this Standard.These reference docu-ments are listed in Nonmandatory Appendix B.
1.4Quality Systems
Nonmandatory requirements relating to the product manufacturer’s Quality System Program are described
in Nonmandatory Appendix C.
1.5Relevant Units
This Standard states values in both Metric and U.S.Customary units.These systems of units are to be regarded separately as standard.Within the text,the U.S.Customary units are shown in parenthesis or sepa-rate tables.Refer to Nonmandatory Appendix A.The values stated in each system are not exact equivalents; therefore,it is required that each system of units be used independently of the bining values from the two systems constitutes nonconformance with the Stan-dard.Nonmandatory Appendix A provides dimensions
in U.S.Customary units.
1.6Convention
For the purpose of determining conformance with this Standard,the convention for fixing significant digits
1where limits and maximum and minimum values are specified,shall be rounded as defined in ASTM Practice E29.This requires that an observed or calcu-lated value shall be rounded off to the nearest unit in the last right-hand digit used for expressing the limit. Decimal values and tolerances do not imply a particular method of measurement.
1.7Size
NPS,followed by a dimensionless number,is the des-ignation for nominal blank size.NPS is related to the reference nominal diameter,DN,as defined in ISO6708. The relationship is typically as follows:
NPS DN
1⁄
2
15
3⁄
4
20
125
11⁄432
11⁄240
250
21⁄265
380
4100
NOTE:For NPS≥4,the related DN is DN p25(NPS).
1.8Service Conditions
Criteria for selection of materials suitable for particu-lar fluid service are not wihtin the scope of this Standard.
2PRESSURE-TEMPERATURE RATINGS
2.1Pressure Classes
Line blanks covered by this Standard are for the fol-lowing pressure classes:150,300,600,900,1500,and 2500as listed in ASME B16.5.
2.2Pressure-Temperature Ratings
2.2.1Ratings.Ratings are the maximum allowable working gage pressure at the temperature shown in Tables2and F-2of ASME B16.5for the appropriate material and pressure class.For intermediate tempera-tures,linear interpolation between temperatures within
a pressure class is permitted by ASME B16.5.
2.2.2System Pressure Testing.Line blanks may be subjected to system tests at a pressure not to exceed 1.5times the38°C(100°F)rating rounded off to the next higher1bar(25psi)increment.Testing at any higher pressure is the responsibility of the user,taking into
ASME B16.48-2005LINE BLANKS
Figure-8 Blank
Paddle Blank
Paddle Spacer
Fig.1Line Blanks
account the requirements of the applicable code or regulation.
2.2.3Mixed Material Joints.Should either the two flanges or the line blank in a flanged line blank assembly not have the same pressure-temperature rating,the rat-ing of the assembled joint at any temperature shall be the lower of the flange or line blank rating at that temper-ature.
3DESIGN
3.1Handle
The handle or web(tie bar)may be integral or attached to the line blank or spacer.The web and its attachment shall be capable of supporting the weight of the blank or spacer in all orientations without permanent defor-mation to the web.
3.2Edge Preparation
Finished surfaces shall be free of projections that would interfere with gasket seating.
3.3Facing
3.3.1Raised Face Joint Blanks.The gasket seating surface finish and dimensions for raised face line blanks shall be in accordance with ASME B16.5.A raised face may be specified at the option of the purchaser.The height of the raised faces shall be in addition to the
2thicknesses,t,listed in Tables1through6(Tables A-1 through A-6in Nonmandatory Appendix A).
3.3.2Female Ring-Joint Blanks.Female ring-joint grooves shall be shaped with the groove side wall sur-face finish not exceeding1.6␮m(63␮in.)Ra roughness. The finish of the gasket contact faces shall be judged by visual comparison with Ra standards(see ASME B46.1) and not by instruments having stylus tracers and elec-tronic amplification.
3.3.3Male Ring-Joint Blanks.The gasket shape(ring) for male ring-joint blanks shall not exceed1.6␮m (63␮in.)Ra roughness.The finish of the gasket contact faces shall be judged by visual comparison with Ra stan-dards(see ASME B46.1)and not by instruments having stylus tracers and electronic amplification.
4DIMENSIONS
4.1General
Dimensions shall be in accordance with Tables1 through18(Tables A-1through A-18of Nonmandatory Appendix A).
4.2Tolerances
4.2.1Facing Tolerances.Tolerances for facings shall be in accordance with ASME B16.
5.
4.2.2Thickness Tolerances.Thickness tolerances are NPS18and smaller−zero+3.0mm(0.12in.)
NPS20and larger−zero+4.8mm(0.19in.)
4.3Openings
(a)For NPS1⁄2,NPS3⁄4,and NPS1blanks in all raised face classes,the inside diameter is equal to standard weight welding neck flange bore.
(b)For NPS11⁄4and larger blanks in Classes150and 300raised face,the inside diameter is equal to the pipe outside diameter.
(c)For NPS11⁄4and larger blanks in Classes600and 900raised face,the inside diameter is equal to Schedule10S welding neck flange bore.
(d)For Class1500raised face blanks,the inside diam-eter is equal to Schedule40welding neck flange bore.
(e)For Class2500raised face blanks,the inside diame-ter is equal to Schedule40through NPS6,Schedule60 for NPS8and NPS10,and Schedule80for NPS12. (f)For all ring-joint blanks,the inside diameter is equal to the pipe outside diameter.
(g)Dimensions are based upon concentric installation of spiral wound gaskets with inner rings as required by ASME B16.20and conform to the maximum permitted bore of ASME B16.5welding neck flanges described in Table16of ASME B16.20.
LINE BLANKS ASME B16.48-2005
4.4Facing Finish
Facing finish shall be in accordance with ASME B16.5, para.6.4.5.
5MATERIALS
Materials for line blanks shall be in accordance with ASME B16.5,Table1-A,and shall include material restrictions cited in notes to Tables2or F-2of ASME B16.5.Recommended bolting materials for flange-blank assemblies are listed in ASME B16.5, Table1-B.
Criteria for the selection of materials are not within the scope of this Standard.
6MARKING
6.1General
(a)Line blanks shall be marked as follows:
(1)Manufacturer’s name or trademark
(2)Material,specification,and grade or class
(3)Pressure class
(4)B16
(5)Size(NPS)
(6)Ring number(if applicable)
(b)Where space does not permit all of the above markings,they may be omitted in the reverse order given in 6.1(a).
3
(c)The B16designation may be applied only when the line blank has been manufactured in full confor-mance with this Standard.
6.2Marking Method
The marking shall be applied by steel stamping on the web(tie bar)or handle.Where space is limited, marking may be stamped on the outside edge of the blind portion of blanks.
7PADDLE BLANK AND SPACER IDENTIFICATION 7.1Paddle Handles
In order to differentiate between an installed paddle spacer and a paddle blank,it is required that there be an externally visible distinction between the two as required by paras.7.2and7.3.
7.2Paddle Blank Handles
Handles for paddle blanks shall be solid with no openings.
7.3Paddle Spacer Handles
Handles for paddle spacers shall have a single through indicator hole located near the end of the handle.The hole diameter shall not be less than12mm(1⁄2in.).
8TESTING
Line blanks are not required to be pressure tested.
Table1Dimensions of Class150Raised Face Figure-8Blanks Inside Outside Centerline
Diameter,B,Diameter,O,Dimension,A,Thickness,t,Web Width,W, NPS mm mm mm mm mm
1⁄2164560 3.038
3⁄
4
215470 3.038 1276480 3.038
11⁄4427390 6.438
11⁄24883100 6.438 261102120 6.451
21⁄273107140 6.451 389133150 6.464
31⁄21021591759.764 41141721909.764 51411942159.776 616821924012.776 821927630012.776 1027333736015.7102 1232440643019.1102 1435644847519.1108 1640651146022.4108 1845754658025.4114 2050860363528.4121 2461071475031.8140
GENERAL NOTE:Dimensions are in millimeters.For inch dimensions,refer to corresponding Table A-1in Nonmandatory Appendix A.
NOTES:
(1)Hole size(where required due to bolt spacing)shall be the same as the flange bolt hole and located
such that it will not interfere with bolting between two flanges.
(2)The thickness of the web(or tie bar)dimension,W t,shall be as determined by para.3.1.
(3)Refer to para.3.3.1.
Table2Dimensions of Class300Raised Face Figure-8Blanks Inside Outside Centerline
Diameter,B,Diameter,O,Dimension,A,Thickness,t,Web Width,W, NPS mm mm mm mm mm
1⁄2165165 6.438
3⁄
4
216480 6.438 1277090 6.438
11⁄44279100 6.438
11⁄24892115 6.438 2611081259.751
21⁄2731271509.751 3891461709.764
31⁄210216218512.764 411417820012.764 514121323515.776 616824827015.776 821930533022.476 1027335938525.4102 1232441945028.4102 1435648351531.8108 1640653657038.1108 1845759463041.1114 2050865168544.5121 2461077281050.8140
GENERAL NOTE:Dimensions are in millimeters.For inch dimensions,refer to corresponding Table A-2in Nonmandatory Appendix A.
NOTES:
(1)Hole size(where required due to bolt spacing)shall be the same as the flange bolt hole and located
such that it will not interfere with bolting between two flanges.
(2)The thickness of the web(or tie bar)dimension,W t,shall be as determined by para.3.1.
(3)Refer to para.3.3.1.
Table3Dimensions of Class600Raised Face Figure-8Blanks Inside Outside Centerline
Diameter,B,Diameter,O,Dimension,A,Thickness,t,Web Width,W, NPS mm mm mm mm mm
1⁄2165165 6.438
3⁄
4
216480 6.438 1277090 6.457
11⁄437791009.757
11⁄243921159.767 2551081259.757
21⁄26712715012.767 38314617012.767
31⁄29615918515.776 410819121515.776 513523826519.186 616226429022.486 821231835028.495 1026539743035.1105 1231545449041.1105 1434648952544.5114 1639756260550.8124 1844861065553.8133 2049767972563.5133 2459778784073.2152
GENERAL NOTE:Dimensions are in millimeters.For inch dimensions,refer to corresponding Table A-3in Nonmandatory Appendix A.
NOTES:
(1)Hole size(where required due to bolt spacing)shall be the same as the flange bolt hole and located
such that it will not interfere with bolting between two flanges.
(2)The thickness of the web(or tie bar)dimension,W t,shall be as determined by para.3.1.
(3)Refer to para.3.3.1.
Table4Dimensions of Class900Raised Face Figure-8Blanks Inside Outside Centerline
Diameter,B,Diameter,O,Dimension,A,Thickness,t,Web Width,W, NPS mm mm mm mm mm
1⁄2166080 6.438
3⁄
4
216790 6.441 12776100 6.457
11⁄437861109.757
11⁄243951259.767 25514016512.757
21⁄26716219012.767 38316519015.767 410820323519.176 513524428022.486 616228632025.486 821235639535.195 1026543247041.1105 1231549553547.8105 1434651856053.8114 1639757261560.5124 1844863568566.5133 2049769675073.2133 2459783590088.9152
GENERAL NOTE:Dimensions are in millimeters.For inch dimensions,refer to corresponding Table A-4in Nonmandatory Appendix A.
NOTES:
(1)Hole size(where required due to bolt spacing)shall be the same as the flange bolt hole and located
such that it will not interfere with bolting between two flanges.
(2)The thickness of the web(or tie bar)dimension,W t,shall be as determined by para.3.1.
(3)Refer to para.3.3.1.
Table5Dimensions of Class1500Raised Face Figure-8Blanks Inside Outside Centerline
Diameter,B,Diameter,O,Dimension,A,Thickness,t,Web Width,W, NPS mm mm mm mm mm
1⁄2166180 6.438
3⁄
4
2167909.741 127761009.764
11⁄435861109.764
11⁄2419512512.770 25314016512.770
21⁄26316219015.776 37817220519.176 410220624022.489 512825129028.489 615427932035.189 820334939541.1102 1025543248050.8114 1230351857060.5114 1433357563566.5127 1638163870576.2133 1842970277585.9146 2047875283095.3152 24575899990111.3178
GENERAL NOTE:Dimensions are in millimeters.For inch dimensions,refer to corresponding Table A-5in Nonmandatory Appendix A.
NOTES:
(1)Hole size(where required due to bolt spacing)shall be the same as the flange bolt hole and located
such that it will not interfere with bolting between two flanges.
(2)The thickness of the web(or tie bar)dimension,W t,shall be as determined by para.3.1.
(3)Refer to para.3.3.1.
Table6Dimensions of Class2500Raised Face Figure-8Blanks Inside Outside Centerline
Diameter,B,Diameter,O,Dimension,A,Thickness,t,Web Width,W, NPS mm mm mm mm mm
1⁄21667909.738
3⁄
4
2173959.741 127831109.764
11⁄43510213012.764
11⁄24111414515.770 25314317015.770
21⁄26316519519.176 37819423022.476 410223227528.489 512827632535.189 615431437041.189 819838444053.8102 1024847354066.5114 1228954662079.2114
GENERAL NOTE:Dimensions are in millimeters.For inch dimensions,refer to corresponding Table A-6in Nonmandatory Appendix A.
NOTES:
(1)Hole size(where required due to bolt spacing)shall be the same as the flange bolt hole and located
such that it will not interfere with bolting between two flanges.
(2)The thickness of the web(or tie bar)dimension,W t,shall be as determined by para.3.1.
(3)Refer to para.3.3.1.
Table7Dimensions of Class1500Female Ring-Joint Facing Figure-8Blanks Inside Outside Centerline
Diameter,B,Diameter,O,Dimension,A,Thickness,t,Web Width,W, NPS mm mm mm mm mm 134648019.151
11⁄442739019.151
11⁄2488310019.157 26110212019.157
21⁄27312114022.457 38913315022.457
31⁄210215417522.464 411417219022.464 514119421525.470 616821924025.483 821927330028.495 1027333036031.8102 1232440643035.1121 1435642647535.1127 1640648354038.1127 1845754658041.1127 2050859763541.1127 2461071175047.8152 GENERAL NOTE:Dimensions are in millimeters.For inch dimensions,refer to corresponding Table A-7in Nonmandatory Appendix A.
NOTES:
(1)Hole size(where required due to bolt spacing)shall be the same as the flange bolt hole and located
such that it will not interfere with bolting between two flanges.
(2)Female ring-joint groove dimensions shall be in accordance with ASME B16.5.
(3)The thickness of the web(or tie bar)dimension,W t,shall be as determined by para.3.1.
Table8Dimensions of Class300Female Ring-Joint Facing Figure-8Blanks Inside Outside Centerline
Diameter,B,Diameter,O,Dimension,A,Thickness,t,Web Width,W, NPS mm mm mm mm mm
1⁄221516515.738
3⁄
4
27648019.145 134709019.151
11⁄4427910022.451
11⁄2489011522.457 26110812525.457
21⁄27312715028.457 38914617028.457
31⁄210215918528.464 411417520031.864 514121023535.170 616824127035.183 821930233041.195 1027335638544.5102 1232441345050.8121 1435645751553.8127 1640650857057.2127 1845757563060.5127 2050863568569.9127 2461074981079.2152
GENERAL NOTE:Dimensions are in millimeters.For inch dimensions,refer to corresponding Table A-8in Nonmandatory Appendix A.
NOTES:
(1)Hole size(where required due to bolt spacing)shall be the same as the flange bolt hole and located
such that it will not interfere with bolting between two flanges.
(2)Female ring-joint groove dimensions shall be in accordance with ASME B16.5.
(3)The thickness of the web(or tie bar)dimension,W t,shall be as determined by para.3.1.
Table9Dimensions of Class600Female Ring-Joint Facing Figure-8Blanks Inside Outside Centerline
Diameter,B,Diameter,O,Dimension,A,Thickness,t,Web Width,W, NPS mm mm mm mm mm
1⁄221516519.138
3⁄
4
27648022.445 134709022.451
11⁄4427910022.451
11⁄2489011522.457 26110812528.457
21⁄27312715031.857 38914617031.857
31⁄210215918535.164 411417521535.164 514121026538.170 616824129044.583 821930235050.895 1027335643057.2102 1232441349063.5121 1435645752566.5127 1640650860573.2127 1845757565579.2127 2050863572588.9127 24610749840104.6152
GENERAL NOTE:Dimensions are in millimeters.For inch dimensions,refer to corresponding Table A-9in Nonmandatory Appendix A.
NOTES:
(1)Hole size(where required due to bolt spacing)shall be the same as the flange bolt hole and located
such that it will not interfere with bolting between two flanges.
(2)Female ring-joint groove dimensions shall be in accordance with ASME B16.5.
(3)The thickness of the web(or tie bar)dimension,W t,shall be as determined by para.3.1.
Table10Dimensions of Class900Female Ring-Joint Facing Figure-8Blanks Inside Outside Centerline
Diameter,B,Diameter,O,Dimension,A,Thickness,t,Web Width,W, NPS mm mm mm mm mm
1⁄221618022.438
3⁄
4
27679022.445 1347110022.451
11⁄4428111025.451
11⁄2489212525.464 26112416531.851
21⁄27313719035.167 38915519035.167 411418123541.173 514121628044.573 616824131547.873 821930839557.280 1027336247063.5121 1232441953573.2121 1435646756082.6121 1640652461591.9127 18457594685101.6133 20508648750111.3127 24610772900133.4140 GENERAL NOTE:Dimensions are in millimeters.For inch dimensions,refer to corresponding Table A-10 in Nonmandatory Appendix A.
NOTES:
(1)Hole size(where required due to bolt spacing)shall be the same as the flange bolt hole and located
such that it will not interfere with bolting between two flanges.
(2)Female ring-joint groove dimensions shall be in accordance with ASME B16.5.
(3)The thickness of the web(or tie bar)dimension,W t,shall be as determined by para.3.1.
ASME B16.48-2005LINE
BLANKS
Table11Dimensions of Class1500Female Ring-Joint Facing Figure-8Blanks
Inside Outside Centerline
Diameter,B,Diameter,O,Dimension,A,Thickness,t,Web Width,W,
NPS mm mm mm mm mm
1⁄221618022.438
3⁄
4
27679025.445 1347110025.454
11⁄4428111025.454
11⁄2489212528.457 26112416535.154
21⁄27313719038.157 38916820544.573 411419424047.876 514122929053.876 616824831560.579 821931839573.286 1027337148082.5133 12324438570101.6133 14356489635111.3140 16406546705124.0146 18457613775133.0152 20508673830142.7165 24610794990168.1178 GENERAL NOTE:Dimensions are in millimeters.For inch dimensions,refer to corresponding Table A-11 in Nonmandatory Appendix A.
NOTES:
(1)Hole size(where required due to bolt spacing)shall be the same as the flange bolt hole and located
such that it will not interfere with bolting between two flanges.
(2)Female ring-joint groove dimensions shall be in accordance with ASME B16.5.
(3)The thickness of the web(or tie bar)dimension,W t,shall be as determined by para.3.1.
LINE BLANKS ASME
B16.48-2005
Table12Dimensions of Class2500Female Ring-Joint Facing Figure-8Blanks
Inside Outside Centerline
Diameter,B,Diameter,O,Dimension,A,Thickness,t,Web Width,W,
NPS mm mm mm mm mm
1⁄221659025.438
3⁄
4
27739528.445 1348311028.454
11⁄44210213035.154
11⁄24811414538.161 26113317041.157
21⁄27314919547.861 38916823050.876 411420327063.583 514124132573.289 616827937082.695 821934044098.695 10273425540117.391 12324495620133.4152
GENERAL NOTE:Dimensions are in millimeters.For inch dimensions,refer to corresponding Table A-12 in Nonmandatory Appendix A.
NOTES:
(1)Hole size(where required due to bolt spacing)shall be the same as the flange bolt hole and located
such that it will not interfere with bolting between two flanges.
(2)Female ring-joint groove dimensions shall be in accordance with ASME B16.5.
(3)The thickness of the web(or tie bar)dimension,W t,shall be as determined by para.3.1.
ASME B16.48-2005LINE BLANKS
Table13Dimensions of Class150Male Oval Ring-Joint Facing Figure-8
Blanks
Inside Centerline
Diameter,B,Dimension,A,Thickness,t,Web Width,W,
NPS mm mm mm mm
13480 6.451
11⁄44290 6.451
11⁄248100 6.457
261120 6.457
21⁄2731409.757
3891509.757
31⁄21021759.764
41141909.764
514121512.776
616824012.783
821930015.795
1027336219.1102
1232443222.4121
1435647622.4127
1640654025.4127
1845757828.4127
2050863528.4127
2461074935.1152
GENERAL NOTE:Dimensions are in millimeters.For inch dimensions,refer to corresponding Table A-13
in Nonmandatory Appendix A.
NOTES:
(1)Hole size(where required due to bolt spacing)shall be the same as the flange bolt hole and located
such that it will not interfere with bolting between two flanges.
(2)Oval ring-joint dimensions shall be in accordance with ASME B16.20,except T h p T+t,where T is
the ring height specified in ASME B16.20.
(3)The thickness of the web(or tie bar)dimension,W t,shall be as determined by para.3.1.。