ASME B16.9 - 2018 - ASME B16.9 - 2018

AN AMERICAN NATIONAL STANDARD

ASME B16-

(Revision of ASME B16-2012)

Factory-Made

Wrought

Buttwelding

Fittings

ASME B16- (Revision of ASME B16-2012)

Factory-Made

Wrought

Buttwelding

Fittings

AN AMERICAN NATIONAL STANDARD

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CONTENTS

Foreword.................................................. ...................... v

Committee Roster.................................................. ................ vi

Correspondence With the B16 Committee................................................. vii

Summary of Changes.................................................. .............. ix

List of Changes in Record Number Order................................................. x

1 Scope.................................................. ................ 1

2 Pressure Ratings.................................................. ....... 1

3 Size.................................................. ................. 2

4 Marking.................................................. .............. 2

5 Material.................................................. .............. 3

6 Fitting Dimensions.................................................. ...... 3

7 Surface Contours.................................................. ....... 3

8 End Preparation.................................................. ....... 3

9 Design Proof Test.................................................. ...... 3

10 Production Tests.................................................. ....... 5

11 Tolerances.................................................. ............ 5

Mandatory Appendix

I References.................................................. ............ 28

Nonmandatory Appendix

A Quality System Program.................................................. ... 29

Figure

8-1 Maximum Envelope for Welding End Transitions................................... 24

Tables

5-1 Material Groupings.................................................. ...... 6

6-1 Dimensions of Long Radius Elbows............................................. 7

6-2 Dimensions of Long Radius Reducing Elbows..................................... 8

6-3 Dimensions of Long Radius Returns............................................ 9

6-4 Dimensions of Short Radius Elbows............................................ 9

6-5 Dimensions of Short Radius 180-deg Returns..................................... 10

6-6 Dimensions of 3D Radius Elbows.............................................. 11

6-7 Dimensions of Straight Tees and Crosses......................................... 12

6-8 Dimensions of Reducing Outlet Tees and Reducing Outlet Crosses...................... 13

6-9 Dimensions of Lap Joint Stub Ends............................................. 19

6-10 Dimensions of Caps.................................................. ...... 20

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iv

• 6-11 Dimensions of Reducers.
• 8-1 Welding Bevels and Root Face.
• 9.2-1 Testing Coverage.
• 9.3-1 Test Factor,f, Determination.
• 11-1 Tolerances.

ASME B16 COMMITTEE

Standardization of Valves, Flanges, Fittings, and Gaskets

(The following is the roster of the Committee at the time of approval of this Standard.)

STANDARDS COMMITTEE OFFICERS R. M. Bojarczuk,Chair C. E. Davila,Vice Chair C. Ramcharran,Secretary

STANDARDS COMMITTEE PERSONNEL

A. Appleton,Alloy Stainless Products Co., Inc. J. E. Barker,Dezurik Water Controls K. Barron,Ward Manufacturing D. C. Bayreuther,Metso Automation, Flow Control Division W. B. Bedesem,Consultant R. M. Bojarczuk,Consultant A. M. Cheta,Qatar Shell GTL M. A. Clark,Consultant G. A. Cuccio,Capitol Manufacturing Co. J. D’Avanzo,Fluoroseal Valves C. E. Davila,Crane Energy K. S. Felder,Valero Energy D. R. Frikken,Becht Engineering Co. D. Hunt, Jr.,Fastenal G. A. Jolly,Samshin Ltd. E. J. Lain,Exelon Nuclear T. A. McMahon,Emerson Process Management

R. C. Merrick,Fluor Enterprises M. L. Nayyar,NICE W. H. Patrick,The Dow Chemical Co. D. Rahoi,CCM 2000 C. Ramcharran,The American Society of Mechanical Engineers D. F. Reid,VSP Technologies R. A. Schmidt,Canadoil J. P. Tucker,Flowserve Corp. F. R. Volgstadt,Volgstadt & Associates, Inc. F. Feng,Delegate, China Productivity Center for Machinery R. W. Barnes,Contributing Member, Anric Enterprises, Inc. P. V. Craig,Contributing Member, Jomar Group B. G. Fabian,Contributing Member, Pennsylvania Machine Works M. Katcher,Contributing Member, Haynes International A. G. Kireta, Jr.,Contributing Member, Copper Development Association, Inc.

SUBCOMMITTEE F—STEEL THREADED AND WELDING FITTINGS

B. G. Fabian,Chair, Pennsylvania Machine Works R. A. Schmidt,Vice Chair, Canadoil E. Lawson,Secretary, The American Society of Mechanical Engineers J. Oh,Secretary, The American Society of Mechanical Engineers A. Appleton,Alloy Stainless Products Co., Inc. G. A. Cuccio,Capitol Manufacturing Co. J. G. Dominguez,Welding Outlets, Inc. K. W. Doughty,CB&I Alloy Piping Products J. P. Ellenberger D. R. Frikken,Becht Engineering Co.

P. W. Heald,Bonney Forge D. Hunt, Jr.,Fastenal G. A. Jolly,Samshin Ltd. F. Kavarana,CBI, Inc. W. Pritzl,Erne Fittings GmbH J. P. Tucker,Flowserve Corp. G. T. Walden,Wolseley M. M. Zaidi,Jacobs Engineering Group, Inc. D. J. Lafferty,Alternate, US Drop Forge Co.

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CORRESPONDENCE WITH THE B16 COMMITTEE

General. ASME Standards are developed and maintained with the intent to represent the consensus of concerned interests. As such, users of this Standard may interact with the Committee by requesting interpretations, proposing revisions or a case, and attending Committee meetings. Correspondence should be addressed to:

Secretary, B16 Standards Committee The American Society of Mechanical Engineers Two Park Avenue New York, NY 10016- go.asme/Inquiry

Proposing Revisions. Revisions are made periodically to the Standard to incorporate changes that appear necessary or desirable, as demonstrated by the experience gained from the application of the Standard. Approved revisions will be published periodically. The Committee welcomes proposals for revisions to this Standard. Such proposals should be as specific as possible, citing the paragraph number(s), the proposed wording, and a detailed description of the reasons for the proposal, including any pertinent documentation.

Proposing a Case. Cases may be issued to provide alternative rules when justified, to permit early implementation of an approved revision when the need is urgent, or to provide rules not covered by existing provisions. Cases are effective immediately upon ASME approval and shall be posted on the ASME Committee web page. Requests for Cases shall provide a Statement of Need and Background Information. The request should identify the Standard and the paragraph, figure, or table number(s), and be written as a Question and Reply in the same format as existing Cases. Requests for Cases should also indicate the applicable edition(s) of the Standard to which the proposed Case applies.

Interpretations. Upon request, the B16 Standards Committee will render an interpretation of any requirement of the Standard Committee. Requests for interpretation should preferably be submitted through the online Interpretation Submittal Form. The form is accessible at go.asme/InterpretationRequest. Upon submittal of the form, the Inquirer will receive an automatic e-mail confirming receipt. If the Inquirer is unable to use the online form, he/she may e-mail the request to the Secretary of the B16 Standards Committee at SecretaryB16@asme, or mail it to the above address. The request for an interpretation should be clear and unambiguous. It is further recommended that the Inquirer submit his/her request in the following format:

Subject: Cite the applicable paragraph number(s) and the topic of the inquiry in one or two words.

Edition: Cite the applicable edition of the Standard for which the interpretation is being requested.

Question: Phrase the question as a request for an interpretation of a specific requirement suitable for general understanding and use, not as a request for an approval of a proprietary design or situation. Please provide a condensed and precise question, composed in such a way that a “yes” or “no” reply is acceptable.

Proposed Reply(ies): Provideaproposedreply(ies)intheformof“Yes”or“No,”withexplanationasneeded replies to more than one question, please number the questions and replies.

Background Information: Provide the Committee with any background information that will assist the Committee in understanding the inquiry. The Inquirer may also include any plans or drawings that are necessary to explain the question; however, they should not contain proprietary names or information.

RequeststhatarenotintheformatdescribedabovemayberewrittenintheappropriateformatbytheCommitteeprior to being answered, which may inadvertently change the intent of the original request.

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ASME B16-

SUMMARY OF CHANGES

FollowingapprovalbytheASMEB16,andafterpublicreview,ASMEB16-2018wasapprovedby the American National Standards Institute on September 29, 2018.

In ASME B16-2018, the U. Customary tables formerly in Mandatory Appendix I have been merged with the Metric tables in the main text; the tables have been redesignated, Mandatory Appendix I deleted, and the cross-references updated accordingly. In addition, this edition includes the following changes identified by a margin note,(18). The Record Number listed below is explained in more detail in the “List of Changes in Record Number Order” following this Summary of Changes.

Page Location Change (Record Number) 1 1 First paragraph editorially revised 1 1.5 References to Mandatory Appendix II editorially revised 2 2 Revised in its entirety(17-1543) 3 Section 5 Revised(17-1543) 3 6.2 In subpara. (c), “3D” revised to “3D radius” (17-1543) 3 Section 9 Revised in its entirety(17-1543) 6 Table 5-1 Added(17-1543) 8 Table 6-2 Formerly Tables 2 and I-2; illustration within table revised(17-1543) 10 Table 6-5 Formerly Tables 5 and I-5; General Note editorially redesignated as Note (1), and Note reference added to the illustration 11 Table 6-6 Formerly Tables 6 and I-6; in title, “3D” revised to “3D Radius,” and in 45-deg elbow entry for NPS 30,“964” mm revised to “946” mm(17-1543) 23 Table 8-1 Formerly Table 12; Note (2) revised(17- 1543) 24 Figure 8-1 Editorially redesignated from Figure 1 28 Mandatory Appendix I Redesignated from Mandatory Appendix II and updated(17-1543)

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LIST OF CHANGES IN RECORD NUMBER ORDER

Record Number Changes

17-1543 Revised Table 6 title from “3D” to “3D Radius” in the Contents. Revised the Foreword. Revised section 2 in its entirety. Revised section 5. Revised “3D” to “3D radius” in section 6.2. Revised section 9 in its entirety. Replaced the figure in Tables 2 and I-2. Revised “3D” to “3D Radius” and “964” to “946” in Table 6. Revised the wording of Note (2) in Table 12. Revised “3D” to “3D Radius” in Table I-6. Made multiple revisions in Mandatory Appendix II.

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thickness, and material that are equivalent to that of the fitting shall be used. Pipe size, wall thickness (or schedule number), and material identity on the fittings are in lieu of pressure rating markings.

ð 18 Þ 2 Design of Fittings

2.2 Acceptable Design Methods design of fittings shall be established by one of the following methods: (a)mathematical analyses contained in nationally recognized pressure vessel or piping codes (e., ASME B31 para. 304 for elbows and para. 304 for tees). (b)proof testing in accordance withsection 9of this Standard. (c)experimental stress analysis, such as described in ASME BPVC, Section VIII, Division 2, Annex 5 with vali- dation of results. Hydrostatic testing can be used to vali- date experimental results. (d)detailedstressanalysis(e.,finiteelementmethod) withresultsevaluatedasdescribedinASMEBPVC,Section VIII, Division 2, Part 5 with validation of results. Strain measurement, photoelastic testing, or hydrostatic testing can be used to validate calculated results.

2.2 Design Thickness meet design or manufac- turing requirements, it is expected that some portion of formed fittings may have to be thicker than the pipe wall with which the fitting is intended to be used. The math- ematical analyses, if used, may take into account such thicker sections.

2.2 Records of English-language records of the mathematical analysis, the successful proof test, or both shall be made available to the purchaser or regula- tory authority upon request.

3 SIZE

NPS, followed by a dimensionless number, is the des- ignationfornominalfittingsize- ence nominal diameter, DN, used in international standards. The relationship is, typically, as follows: DN NPS 15 1 ∕ 2 20 3 ∕ 4 25 1 32 11 ∕ 4

40 11 ∕ 2 50 2 65 21 ∕ 2 80 3 100 4

NOTE: For NPS > 4, the equivalence is DN = 25 × NPS.

4 MARKING

4 Standard Marking

Each fitting shall be permanently marked to show the following: (a)manufacturer’s name or trademark (b)material identification, either the ASTM or ASME grade designation (c)schedule number 1 or nominal wall thickness in mm (d)size — the nominal pipe size (NPS) identification number related to the end connections shall be used (e)compliance—seepara.4 fitting marking A manufacturer may supplement these mandatory markings with others, including a DN size designation, but confusion with the required marking shall be avoided.

4 Exceptions

Where the size of the fitting does not permit complete marking, the identification marks may be omitted in reverse of the order presented inpara. 4.

4 Depth of Stamping

Where steel stamps are used, care shall be taken so that the marking is not deep enough or sharp enough to cause cracks or to reduce the wall thickness of the fitting below the minimum allowed.

4 Compliance

4.4 Standard Fittings the fitting was manufac- tured in conformance with this Standard, including all dimensional requirements, is certified by a prefix “WP” in the material grade designation marking.

4.4 Special Fittings the fitting was manufac- tured in conformance with this Standard, except that dimensional requirements are as agreed between the purchaser and the manufacturer, is certified by a supple- mentary suffix to the material grade designation marking as follows: (a)“S58” of ASTM A960 applies for fittings in accor- dance with ASTM A234, ASTM A403, and ASTM A420. (b)“S8” applies for fittings in accordance with ASTM A815. (c)“SPLD” applies for fittings in accordance with ASTM B361, ASTM B363, and ASTM B366.

1 Schedule number is a dimensionless number that is widely used as a convenientdesignationforuseinorderingpipeandfittings associated with a group of standardized pipe wall thicknesses. Refer to ASMEB36.10MandASMEB36 numbers.

ASME B16-

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ð 18 Þ 5 MATERIAL

Wrought fittings covered by this Standard shall be in accordance with ASTM A234, ASTM A403, ASTM A420, ASTM A815, ASTM B361, ASTM B363, ASTM B366, or the corresponding specification listed in ASME BPVC, Section II. The term “wrought” denotes fittings made of pipe, tubing, plate, or forgings. For purposes of deter- mining proof testing requirements ofsection 9, the mate- rials are grouped by similar properties as shown inTable 5-1. Fittings made from block forgings may only be supplied subject to agreement between the manufacturer and purchaser. Such fittings need not meet the requirements ofsection 7.

6 FITTING DIMENSIONS

6 General

This Standard provides for a fixed position for the welding ends with reference to either the centerline of the fittings or the overall dimensions. Dimensional re- quirements for these fittings are inTables 6- through6-11.

6 Special Dimensions

6.2 Fatigue Loading applications where fatigue loading is a concern, required minimum dimensions shall be furnished by the purchaser.

6.2 Bore Diameter diameters away from the ends are not specified. If special flow path requirements are needed, the bore dimensions shall be specified by the purchaser.

6.2 StubEnds conditionsand joint construc- tion often dictate stub end length requirements. Therefore, the purchaser must specify long or short pattern fitting when ordering. [See General Note (b) in Table 6-9.]

ð 18 Þ 6.2 Elbows-made segments of short radius, long radius, and 3D radius elbows may be made to meet customer angle requirements. With the exception of theBdimension, factory-made segments of elbows shall meet all other requirements of this Standard. TheBdimension for segmented elbows can be calculated as follows: For segments of 90-deg elbows B As= ×tan( /2)

where A= dimensionAfor appropriate 90-deg elbow being segmented from (a)Table 6-1for long radius elbow, mm (in.) (b)Table6-4forshortradiuselbow,mm(in.) (c)Table 6-6for 3D radius elbow, mm (in.)

Bs= center-to-end dimension for segmented elbow θ= angle of segmented elbow — 30 deg, 60 deg, 75 deg, etc.

When special elbows are intended for field segmenting, theoutsideorinsidediametertoleranceshallbefurnished throughout the fitting by agreement between the manu- facturer and the purchaser. Any mismatch on the outside or inside diameter needs to be corrected in the field by grinding, back-welding, or bridging of weld to meet the applicable piping code requirements. Although the elbow intended for field segmenting must meet the re- quirements of this Standard, once the field-segmented elbow is cut, it is not a B16 product.

7 SURFACE CONTOURS

Where adjacent openings in fittings are not in parallel planes, they shall be joined by a circular arc or radius on theexternalsurfaces in tangents. Except as provided for block forgings (see section 5), the projected profile of external surfaces of fittings shall not have sharp intersections (corners) and/or collapsed arcs.

8 END PREPARATION

Unless otherwise specified, the details of the welding end preparation shall be in accordance withTable 8-1. Transitions from the welding bevel to the outside surface of the fitting and from the root face to the inside surface of the fitting lying within the maximum envelope shown inFigure 8-1are at the manufacturer’s option, except as covered in Note (5) ofFigure 8-1or unless otherwise specifically ordered.

9 DESIGN PROOF TEST ð 18 Þ

9 Required Tests

Proof tests shall be made as set forth in this Standard when the manufacturer chooses proof testing to qualify the fitting design. The pressure design thickness for critical areas of each type of fitting shall be determined and recorded. The design thickness for other sizes or wall thicknesses covered inpara. 9 require a similar percentageofreinforcementproportionalbysizeorthick- ness. Critical areas are normally the inner radius of elbows, the crotch of tees and crosses, the knuckle radius of caps, and the large ends of reducers. Proof test shall be based on the computed burst pressure of the fitting and its connecting piping as defined inpara. 9.

9 Test Assembly

9.2 Representative Components fitting type shall be tested, except that testing of certain types of fittings can qualify other fittings as described inTable

ASME B16-

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containment from the tested fitting before or during the time it is to be held at or above the computed pressure. A proof test is successful only when the fitting being tested withstands for at least 180 s a continuous proof test pres- sure of at least the computed minimum (seepara. 9.3) without exhibiting loss of containment or evidence of cracking, fissuring, tearing, etc. in the fitting under test.

9 Applicability of Test Results

It is not necessary to conduct an individual test of fittings with all combinations of sizes, wall thicknesses, and materials. A successful proof test on one representa- tive fitting may qualify others to the extent described in paras. 9.4,9.4, and9.4.

9.4 SizeRange similarly proportioned fittings as defined inpara. 9. with a size range from one-half to twice that for the tested fitting.

9.4 Thickness Range test fitting may be used to qualify similarly proportioned fittings as defined inpara. 9.2/Dranges from one-half to three times that for the tested fitting.

9.4 Material Grades pressure-retaining capac- ity of a fitting of the same basic design configuration and method of manufacture made from material in a material groupaslistedinTable5-1willbedirectlyproportionalto the tensile properties of the materials. Therefore, it is nec- essary to test only a representative fitting to prove the design of a fitting for all materials in a group.

9 Maintenance of Results

The manufacturer shall have a quality control (QC) program that verifies the manufacturing process and material used and ensures that the resulting geometry and design thicknessof the fittingsor joints manufactured reasonably conform to the geometries tested. The QC program shall control the manufacturing drawings and maintain the QC records showing conformance to these drawings. Tests made in accordance with and at the time of previous editions of this Standard are not intended to be nullified by the changes made in this edition’s test procedure and requirements, provided the design criteria for the type tested can be determined.

Whenever a significant change is made in the geometry or method of manufacture, the manufacturer shall either retest the new production or show by analysis that the change would not affect the results of prior tests. Examples of changes in geometry that require retests are a change in starting thickness or revised tooling configuration.

9 Proof Test Report

A report of the testing for each joint configuration shall be prepared and shall include (a)descriptionofthetest,includingthenumberoftests andffactor used to establish the target proof test (b)instrumentation and methods of calibration used (c)material test reports for the assembly’s materials (fitting, pipe, and end caps, if used) (d)actual final test pressures achieved for each test (e)lengthoftimeatorabovetherequiredtestpressure (seepara. 9.3) (f)calculations performed (g)location of rupture, if any, including a sketch or photographs of the assembly (h)pressure design thickness required in critical areas (i)certification by the manufacturer and by a licensed Authorized Inspector or other third party having experi- ence in pressure component design and testing

10 PRODUCTION TESTS

Hydrostatic testing of wrought fittings is not required by this Standard. All fittings shall be capable of with- standing, without leakage or impairment of serviceability, a hydrostatic test pressure required by the applicable piping code for seamless pipe of material equivalent to the fitting material, and of the size and wall thickness the fitting marking identifies.

11 TOLERANCES

Tolerances for fittings are shown inTable 11-1and apply to the nominal dimensions given inTables 6- through6-11. Where given in the tables, the minimum and maximum dimensions are based on these tolerances. The listings with decimals do not imply precision measurement, such as use of vernier, micrometer, or electronic readout equipment.

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ð 18 Þ Table 5-1Material Groupings

Group No. Material Standards 1 Carbon and low-alloy steels ASTM A234/A234M and ASTM A420/A420M 2 Austenitic and duplex stainless steels ASTM A403/A403M and ASTM A815/A815M 3 Nickel alloys ASTM B366/B366M 4 Aluminum alloys ASTM B 5 Titanium alloys ASTM B

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ð 18 Þ Table 6-2Dimensions of Long Radius Reducing Elbows

Nominal Pipe Size (NPS)

Outside Diameter at Bevel, mm (in.) Center- to-End, Large End Small End A, mm (in.) 2 × 1 1 ∕ 2 60 (2) 48 (1) 76 (3) 2 × 1 1 ∕ 4 60 (2) 42 (1) 76 (3) 2 × 1 60 (2) 33 (1) 76 (3)

21 ∕ 2 × 2 73 (2) 60 (2) 95 (3) 21 ∕ 2 × 1 1 ∕ 2 73 (2) 48 (1) 95 (3) 21 ∕ 2 × 1 1 ∕ 4 73 (2) 42 (1) 95 (3)

3 × 2 1 ∕ 2 88 (3) 73 (2) 114 (4) 3 × 2 88 (3) 60 (2) 114 (4) 3 × 1 1 ∕ 2 88 (3) 48 (1) 114 (4)

31 ∕ 2 × 3 101 (4) 88 (3) 133 (5) 31 ∕ 2 × 2 1 ∕ 2 101 (4) 73 (2) 133 (5) 31 ∕ 2 × 2 101 (4) 60 (2) 133 (5)

4 × 3 1 ∕ 2 114 (4) 101 (4) 152 (6) 4 × 3 114 (4) 88 (3) 152 (6) 4 × 2 1 ∕ 2 114 (4) 73 (2) 152 (6) 4 × 2 114 (4) 60 (2) 152 (6)

5 × 4 141 (5) 114 (4) 190 (7) 5 × 3 1 ∕ 2 141 (5) 101 (4) 190 (7) 5 × 3 141 (5) 88 (3) 190 (7) 5 × 2 1 ∕ 2 141 (5) 73 (2) 190 (7)

6 × 5 168 (6) 141 (5) 229 (9) 6 × 4 168 (6) 114 (4) 229 (9) 6 × 3 1 ∕ 2 168 (6) 101 (4) 229 (9) 6 × 3 168 (6) 88 (3) 229 (9)

8 × 6 219 (8) 168 (6) 305 (12) 8 × 5 219 (8) 141 (5) 305 (12) 8 × 4 219 (8) 114 (4) 305 (12)

Nominal Pipe Size (NPS)

Outside Diameter at Bevel, mm (in.) Center- to-End, Large End Small End A, mm (in.) 10 × 8 273 (10) 219 (8) 381 (15) 10 × 6 273 (10) 168 (6) 381 (15) 10 × 5 273 (10) 141 (5) 381 (15)

12 × 10 323 (12) 273 (10) 457 (18) 12 × 8 323 (12) 219 (8) 457 (18) 12 × 6 323 (12) 168 (6) 457 (18)

14 × 12 355 (14) 323 (12) 533 (21) 14 × 10 355 (14) 273 (10) 533 (21) 14 × 8 355 (14) 219 (8) 533 (21)

16 × 14 406 (16) 355 (14) 610 (24) 16 × 12 406 (16) 323 (12) 610 (24) 16 × 10 406 (16) 273 (10) 610 (24)

18 × 16 457 (18) 406 (16) 686 (27) 18 × 14 457 (18) 355 (14) 686 (27) 18 × 12 457 (18) 323 (12) 686 (27) 18 × 10 457 (18) 273 (10) 686 (27)

20 × 18 508 (20) 457 (18) 762 (30) 20 × 16 508 (20) 406 (16) 762 (30) 20 × 14 508 (20) 355 (14) 762 (30) 20 × 12 508 (20) 323 (12) 762 (30) 20 × 10 508 (20) 273 (10) 762 (30)

24 × 22 610 (24) 559 (22) 914 (36) 24 × 20 610 (24) 508 (20) 914 (36) 24 × 18 610 (24) 457 (18) 914 (36) 24 × 16 610 (24) 406 (16) 914 (36) 24 × 14 610 (24) 355 (14) 914 (36) 24 × 12 610 (24) 323 (12) 914 (36) ... ... ... ...

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Table 6-3 Dimensions of Long Radius Returns

Nominal Pipe Size (NPS)

Outside Diameter at Bevel, mm (in.)

Center- to- Center, O, mm (in.)

Back- to- Face, K, mm (in.) 1 ∕ 2 21 (0) 76 (3) 48 (1) 3 ∕ 4 26 (1) 76 (3) 51 (2) 1 33 (1) 76 (3) 56 (2) 11 ∕ 4 42 (1) 95 (3) 70 (2) 11 ∕ 2 48 (1) 114 (4) 83 (3)

2 60 (2) 152 (6) 106 (4) 21 ∕ 2 73 (2) 190 (7) 132 (5) 3 88 (3) 229 (9) 159 (6) 31 ∕ 2 101 (4) 267 (10) 184 (7) 4 114 (4) 305 (12) 210 (8)

5 141 (5) 381 (15) 262 (10) 6 168 (6) 457 (18) 313 (12) 8 219 (8) 610 (24) 414 (16) 10 273 (10) 762 (30) 518 (20) 12 323 (12) 914 (36) 619 (24)

14 355 (14) 1 067 (42) 711 (28) 16 406 (16) 1 219 (48) 813 (32) 18 457 (18) 1 372 (54) 914 (36) 20 508 (20) 1 524 (60) 1 016 (40) 22 559 (22) 1 676 (66) 1 118 (44) 24 610 (24) 1 829 (72) 1 219 (48)

NOTES: (1) SeeTable 11-1for tolerance for alignment of endsU. (2) DimensionAis equal to one-half of dimensionO.

Table 6-4 Dimensions of Short Radius Elbows

Nominal Pipe Size (NPS)

Outside Diameter at Bevel, mm (in.)

Center- to- End, A, mm (in.) 1 33 (1) 25 (1) 11 ∕ 4 42 (1) 32 (1) 11 ∕ 2 48 (1) 38 (1) 2 60 (2) 51 (2) 21 ∕ 2 73 (2) 64 (2)

3 88 (3) 76 (3) 31 ∕ 2 101 (4) 89 (3) 4 114 (4) 102 (4) 5 141 (5) 127 (5) 6 168 (6) 152 (6)

8 219 (8) 203 (8) 10 273 (10) 254 (10) 12 323 (12) 305 (12) 14 355 (14) 356 (14) 16 406 (16) 406 (16)

18 457 (18) 457 (18) 20 508 (20) 508 (20) 22 559 (22) 559 (22) 24 610 (24) 610 (24)

ASME B16-

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