Factory-Made Wrought Buttwelding Fittings AN AMERICAN NATIONAL STANDARD ASME B16.9-2007 (Revision of ASME B16.9-2003) Copyright ASME International Provided by IHS under license with ASME Licensee=Savia Peru SA/5968844001, User=CHAFLOQUE CESPEDES, JOSE ENRIQUE Not for Resale, 07/07/2011 18:12:08 MDT No reproduction or networking permitted without license from IHS --`,`,,,,,,`,`,,,````````,```-`-`,,`,,`,`,,`---
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Factory-Made Wrought Buttwelding Fittings
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
ASME B16.9-2007(Revision of ASME B16.9-2003)
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ASME B16.9-2007(Revision of ASME B16.9-2003)
Factory-MadeWroughtButtweldingFittings
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
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Date of Issuance: December 7, 2007
The next edition of this Standard is scheduled for publication in 2012. 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 they are issued.
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 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.
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 rights asserted in connection with any
items 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 of the validity of any such patent rights, and the risk of infringement of such rights, isentirely their own responsibility.
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without the prior written permission of the publisher.
The American Society of Mechanical EngineersThree Park Avenue, New York, NY 10016-5990
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FOREWORD
In 1921, the American Engineering Standards Committee, later the American Standards Associa-tion (ASA), organized Sectional Committee B16 to unify and further develop national standardsfor pipe flanges and fittings (and, later, for valves, gaskets, and valve actuators). Cosponsors ofthe B16 Committee were The American Society of Mechanical Engineers (ASME), the Heatingand Piping Contractors National Association [now the Mechanical Contractors Association ofAmerica (MCAA)], and the Manufacturers Standardization Society of the Valve and FittingsIndustry (MSS). Cosponsors were later designated as cosecretariat organizations.
Standardization of welding fittings was initiated in 1937 by a subgroup (designated Subgroup 6)of Subcommittee 3. After consideration of several drafts, a standard was approved by the Commit-tee, cosponsors, and ASA, and published with the designation ASA B16.9-1940.
Revisions were made in 1950 and 1955 to add sizes up to NPS 24 and to complete coverageof fittings in some sizes. These revisions were approved and published as ASA B16.9-1951 andASA B16.9-1958. With the subgroup now designated Subcommittee 6 (later Subcommittee F),further revisions were begun to clarify the intent of the standard, to add angularity tolerances,and to include fittings of different types (long radius reducing elbows and crosses) and smallersizes (NPS 1⁄4 and NPS 1⁄2). This revision was published as ASA B16.9-1964 after ASA approval.
After reorganization of ASA, first as the United States of America Standards Institute (USASI),then as the American National Standards Institute (ANSI), with the Sectional Committee beingredesignated as an American National Standards Committee, another revision increasing the sizerange to NPS 48 and revising the text for clarity was approved and published as ANSI B16.9-1971.
In 1975, Subcommittee F began a major revision to bring the standard up to date with currentpractice and usage. Common fractions were expressed as decimals (but without intending higherprecision) and metric dimensional equivalents were added. Provisions for step-wise change ofradius for NPS 3⁄4 long radius elbows and 180-deg returns were introduced. Following StandardsCommittee, cosecretariat, and ANSI approval, the revision was published as ANSI B16.9-1978.It was updated by a corrective addendum, B16.9a-1981, issued in February 1982.
In 1982, American National Standards Committee B16 was reorganized as an ASME Committeeoperating under procedures accredited by ANSI. In ASME/ANSI B16.9-1986, the text was revisedand inch dimensions were established as the standard.
In 1991, the Subcommittee reviewed the document and made a number of revisions that wereincluded in ASME B16.9-1993. Dimensions for short pattern lap joints were also added.
In ASME B16.9-2001, short radius elbows and returns were added, which included all dimen-sions and tolerances of ASME B16.28-1994. Metric units were provided as an independent butparallel alternative standard to U.S. Customary units and a Quality System Program appendixwas added.
In 2003, the Subcommittee reviewed the document and made a number of revisions. The scopeof the standard was changed to permit fabricated lap joint stub ends employing circumferentialor intersection welds.
In 2006, the Subcommittee reviewed the document and made a number of additions andrevisions. Segmental elbow requirements were added as were 3D elbow dimensions. Referencedocuments were updated.
This Standard was approved as an American National Standard on May 18, 2007.
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ASME 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 OFFICERS
H. R. Sonderegger, ChairM. L. Nayyar, Vice Chair
U. D’Urso, Secretary
STANDARDS COMMITTEE PERSONNEL
R. W. Barnes, Anric Enterprises, Inc.W. B. Bedesem, ExxonMobil Research & Engineering Co.D. F. Buccicone, Elkhart Products, Corp.M. A. Clark, Nibco, Inc.U. D’Urso, The American Society of Mechanical EngineersC. E. Floren, Mueller Co.D. R. Frikken, Becht Engineering Co.M. L. Henderson, Forgital USAG. A. Jolly, Vogt Valves/Flowserve Corp.
SUBCOMMITTEE F — STEEL-THREADED AND WELDED FITTINGS
G. A. Jolly, Chair, Vogt Valves/Flowserve Corp.G. A. Cuccio, Vice Chair, Capitol Manufacturing Co.T. Lazar, Secretary, The American Society of Mechanical EngineersA. Appleton, Alloy Stainless Product Co., Inc.W. J. Birkholz, Flowline Division, Markovitz Enterprises, Inc.K. W. Doughty, Shaw Alloy Piping Products, Inc.J. P. Ellenberger, ConsultantD. R. Frikken, Becht Engineering Co.
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M. Katcher, Haynes InternationalW. N. McLean, Newco ValvesT. A. McMahon, Fisher Controls International, Inc.M. L. Nayyar, Bechtel Power Corp.J. D. Page, U.S. Nuclear Regulatory CommissionW. H. Patrick, The Dow Chemical Co.R. A. Schmidt, Hackney Ladish, Inc.H. R. Sonderegger, Anvil International, Inc.W. M. Stephan, Flexitallic LPD. A. Williams, Southern Co. Generation
R. E. Johnson, ConsultantC. J. Lafferty, Pennsylvania Machine Works, Inc.D. H. Monroe, ConsultantR. A. Schmidt, Hackney Ladish, Inc.H. R. Sonderegger, Anvil International, Inc.J. P. Tucker, FlowserveM. M. Zaidi, Jacobs Engineering
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CORRESPONDENCE WITH THE B16 COMMITTEE
General. ASME Standards are developed and maintained with the intent to represent theconsensus of concerned interests. As such, users of this Standard may interact with the Committeeby requesting interpretations, proposing revisions, and attending Committee meetings. Corre-spondence should be addressed to:
Secretary, B16 Standards CommitteeThe American Society of Mechanical EngineersThree Park AvenueNew York, NY 10016-5990
As an alternative, inquiries may be submitted via e-mail to: [email protected] Revisions. Revisions are made periodically to the Standard to incorporate changes
that appear necessary or desirable, as demonstrated by the experience gained from the applicationof the Standard. Approved revisions will be published periodically.
The Committee welcomes proposals for revisions to this Standard. Such proposals should beas specific as possible, citing the paragraph number(s), the proposed wording, and a detaileddescription of the reasons for the proposal, including any pertinent documentation.
Interpretations. Upon request, the B16 Committee will render an interpretation of any require-ment of the Standard. Interpretations can only be rendered in response to a written request sentto the Secretary of the B16 Standards Committee.
The request for interpretation should be clear and unambiguous. It is further recommendedthat the inquirer submit his/her request in the following format:
Subject: Cite the applicable paragraph number(s) and the topic of the inquiry.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 approvalof a proprietary design or situation. The inquirer may also include any plansor drawings which are necessary to explain the question; however, they shouldnot contain 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 additionalinformation 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 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.
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ASME B16.9-2007
FACTORY-MADE WROUGHT BUTTWELDING FITTINGS
1 SCOPE
1.1 General
This Standard covers overall dimensions, tolerances,ratings, testing, and markings for factory-made wroughtbuttwelding fittings in sizes NPS 1⁄2 through NPS 48(DN 15 through DN 1200).
1.2 Special Fittings
Fittings may be made to special dimensions, sizes,shapes, and tolerances by agreement between the manu-facturer and the purchaser.
1.3 Fabricated Fittings
Fabricated laterals and other fittings employing cir-cumferential or intersection welds are considered pipefabrication and are not within the scope of this Standard.
Fabricated lap joint stub ends are exempt from theabove restrictions, provided they meet all the require-ments of the applicable ASTM material specificationlisted in section 5.
1.4 Standard Units
The values stated in either metric or U.S. Customaryunits are to be regarded separately as standard. Withinthe text, the U.S. Customary units are shown in paren-theses. The values stated in each system are not exactequivalents; therefore, each system must be used inde-pendently of the other. Combining values from the twosystems may result in nonconformance with thisStandard.
The designation for size is NPS for both metric- andcustomary-dimensioned fittings. Fitting pressure ratingis associated with the connecting wall thickness of pipeof equivalent size and material.
1.5 References
1.5.1 Referenced Standards. Standards and specifi-cations adopted by reference in this Standard are shownin Mandatory Appendix II. It is not considered practicalto identify the specific edition of each standard andspecification in the individual references. Instead, thespecific edition reference is identified in MandatoryAppendix II. A product made in conformance with aprior edition of referenced standards and in all otherrespects conforming to this Standard will be consideredto be in conformance.
1
1.5.2 Codes and Regulations. A fitting used underthe jurisdiction of the ASME Boiler and Pressure VesselCode, the ASME Code for Pressure Piping, or a govern-mental regulation is subject to any limitation of that codeor regulation. This includes any maximum temperaturelimitation, or rule governing the use of a material at lowtemperature.
1.6 Service Conditions
Criteria for selection of fitting types and materialssuitable for particular fluid service are not within thescope of this Standard.
1.7 Welding
Installation welding requirements are outside thescope of this Standard.
1.8 Quality Systems
Nonmandatory requirements relating to the fittingmanufacturer’s Quality System Program are describedin Nonmandatory Appendix A.
1.9 Convention
For the purpose of determining conformance withthis Standard, the convention for fixing significant digitswhere limits (maximum or minimum values) are speci-fied shall be rounded off as defined in ASTM E 29. Thisrequires that an observed or calculated valueshall be rounded off to the nearest unit in the last right-hand digit used in expressing the limit. Decimal valuesand tolerances do not imply a particular method ofmeasurement.
1.10 Pressure Rating Designation
Class, followed by a dimensionless number, is thedesignation for pressure–temperature ratings. Standard-ized designations for flanges per ASME B16.5 referencedin this Standard are Classes 150, 300, 600, 900, 1500,and 2500.
2 PRESSURE RATINGS
2.1 Basis of Ratings
The allowable pressure ratings for fittings designedin accordance with this Standard may be calculated asfor straight seamless pipe of equivalent material (asshown by comparison of composition and mechanicalproperties in the respective material specifications) in
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ASME B16.9-2007
accordance with the rules established in the applicablesections of ASME B31, Code for Pressure Piping. Forthe calculation, applicable data for the pipe size, wallthickness, and material that is equivalent to that of thefitting shall be used. Pipe size, wall thickness (or sched-ule number), and material identity on the fittings are inlieu of pressure rating markings.
2.2 Design of Fittings
The design of fittings shall be established by mathe-matical analyses (e.g., ASME B16.49 for bends) containedin nationally recognized pressure vessel or piping codes,or at the manufacturer’s option by proof testing in accor-dance with section 9 of this Standard. In order to meetdesign or manufacturing requirements, it is expectedthat some portion of formed fittings may have to bethicker than the pipe wall with which the fitting isintended to be used. The mathematical analyses, if used,may take into account such thicker sections. Records ofmathematical analysis and/or successful proof test datashall be available at the manufacturer ’s facility forinspection by the purchaser.
3 SIZE
NPS, followed by a dimensionless number, is the des-ignation for nominal fitting size. NPS is related to thereference nominal diameter, DN, used in internationalstandards. The relationship is, typically, as follows:
DN NPS
15 1⁄220 3⁄425 132 11⁄4
40 11⁄250 265 21⁄280 3
100 4
NOTE: For NPS > 4, the equivalence is DN p 25 � NPS.
4 MARKING
4.1 Standard Marking
Each fitting shall be permanently marked to show thefollowing:
(a) manufacturer’s name or trademark(b) material identification, either the ASTM or ASME
grade designation(c) schedule number1 or nominal wall thickness in
mm
1 Schedule number is a dimensionless number that is widely usedas a convenient designation for use in ordering pipe and fittings.It is normally associated with a group of standardized pipe wallthickness. Refer to ASME B36.10M and ASME B36.19M for com-plete details on pipe schedule numbers.
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(d) size — the nominal pipe size (NPS) identificationnumber related to the end connections shall be used
(e) compliance — see para. 4.4 for standard and spe-cial fitting marking
A manufacturer may supplement these mandatorymarkings with others, including a DN size designation,but confusion with the required marking shall beavoided.
4.2 Exceptions
Where the size of the fitting does not permit completemarking, the identification marks may be omitted inreverse of the order presented above.
4.3 Depth of Stamping
Where steel stamps are used, care shall be taken sothat the marking is not deep enough or sharp enoughto cause cracks or to reduce the wall thickness of thefitting below the minimum allowed.
4.4 Compliance
4.4.1 Standard Fittings. That the fitting was manu-factured in conformance with this Standard, includingall dimensional requirements, is certified by a prefix“WP” in the material grade designation marking.
4.4.2 Special Fittings. That the fitting was manufac-tured in conformance with this Standard, except thatdimensional requirements are as agreed between thepurchaser and the manufacturer, is certified by a supple-mentary suffix to the material grade designation mark-ing as follows:
(a) “S58” of ASTM A 960 applies for fittings in accor-dance with ASTM A 234, A 403, and A 420.
(b) “S8” applies for fittings in accordance withASTM A 815.
(c) “SPLD” applies for fittings in accordance withASTM B 361, B 363, and B 366.
5 MATERIAL
Wrought fittings covered by this Standard shall be inaccordance with ASTM A 234, A 403, A 420, A 815,B 361, B 363, B 366, or the corresponding standard listedin Section II of the ASME Boiler and Pressure VesselCode. The term wrought denotes fittings made of pipe,tubing, plate, or forgings. Fittings made from block forg-ings may only be supplied subject to agreement betweenthe manufacturer and purchaser. Such fittings need notmeet the requirements of section 7.
6 FITTING DIMENSIONS
6.1 General
This Standard provides for a fixed position for thewelding ends with reference to either the centerline of
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ASME B16.9-2007
the fittings or the overall dimensions. Dimensionalrequirements for these fittings are to be found in Tables 1through 11 and Tables I-1 through I-11 of MandatoryAppendix I.
6.2 Special Dimensions
6.2.1 Fatigue Loading. For applications wherefatigue loading is a concern, required minimum dimen-sions shall be furnished by the purchaser.
6.2.2 Bore Diameter. Bore diameters away from theends are not specified. If special flow path requirementsare needed, the bore dimensions shall be specified bythe purchaser.
6.2.3 Stub Ends. Service conditions and joint con-struction often dictate stub end length requirements.Therefore, the purchaser must specify long or short pat-tern fitting when ordering. [See General Note (c) inTables 9 and I-9.]
6.2.4 Segmental Elbows. Factory-made segmentsof short radius, long radius, and 3D radius elbows maybe made to meet customer angle requirements. With theexception of the B dimension, factory-made segmentsof elbows shall meet all other requirements of this Stan-dard. The B dimension for segmented elbows can becalculated as follows:
For segments of 90-deg elbows
Bs p A � tan(�/2)
whereA p dimension A for appropriate 90-deg elbow
being segmented from(a) Table 1/Table I-1 for long radius elbow,
mm (in.)(b) Table 4/Table I-4 for short radius elbow,
mm (in.)(c) Table 6/Table I-6 for 3D elbow, mm (in.)
Bs p center-to-end dimension for segmented elbow� p angle of segmented elbow — 30 deg, 60 deg,
75 deg, etc.
When special elbows are intended for field seg-menting, the outside or inside diameter tolerance shallbe furnished throughout the fitting by agreementbetween the manufacturer and the purchaser. Any mis-match on the outside or inside diameter needs to becorrected in the field by grinding, back-welding, orbridging of weld to meet the applicable piping coderequirements. Although the elbow intended for field-segmenting must meet the requirements of this Stan-dard, once the field-segmented elbow is cut, it is not aB16.9 product.
7 SURFACE CONTOURS
Where adjacent openings in fittings are not in parallelplanes, they shall be joined by a circular arc or radius
3
on the external surfaces. The arc or radius may be termi-nated in tangents. Except as provided for block forgings(see section 5), the projected profile of external surfacesof fittings shall not have sharp intersections (corners)and/or collapsed arcs.
8 END PREPARATION
Unless otherwise specified, the details of the weldingend preparation shall be in accordance with Table 12.Transitions from the welding bevel to the outside surfaceof the fitting and from the root face to the inside surfaceof the fitting lying within the maximum envelope shownin Fig. 1 are at the manufacturer’s option, except ascovered in Note (5) of Fig. 1 or unless otherwise specifi-cally ordered.
9 DESIGN PROOF TEST
9.1 Required Tests
Proof tests shall be made as set forth in this Standardwhen the manufacturer chooses proof testing to qualifythe fitting design. Unless otherwise agreed uponbetween the manufacturer and purchaser, the proof testshall be one based on the computed bursting pressureof the fitting and its connecting piping.
Lap joint stub ends are exempt from proof testingbecause they are used in a flange assembly, which willhave different ratings depending on service application.
9.2 Test Assembly
9.2.1 Representative Components. Fittings that arerepresentative of production and selected for testingshall be identified as to material, grade, and lot, includ-ing heat treatment. They shall be inspected for dimen-sional compliance to this Standard.
9.2.2 Other Components. Straight seamless orwelded pipe sections whose calculated bursting strengthis at least as great as the proof test pressure as calculatedin para. 9.3 shall be welded to each end of the fitting to betested. Any internal misalignment greater than 1.5 mm(0.06 in.) shall be reduced by taper boring at a slope notover 1:3. Length of pipe sections for closures shall be asfollows:
(a) Minimum length of pipe shall be one pipe O.D.for NPS 14 (DN 350) and smaller.
(b) Minimum length of pipe shall be one-half pipeO.D. for NPS greater than 14 (DN 350).
9.3 Test Procedure
Test fluid shall be water or other liquid used for hydro-static testing. Hydrostatic pressure shall be applied tothe assembly. The test is successful if the fitting with-stands, without rupture, a proof test pressure at least
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ASME B16.9-2007
equal to the computed minimum proof test definedbelow.
P p2StD
whereD p specified outside diameter of pipeP p computed minimum proof test pressure for
fittingS p actual tensile strength of the test fitting, deter-
mined on a specimen representative of the testfitting, which shall meet the tensile strengthrequirements of the applicable material of sec-tion 5
t p nominal pipe wall thickness of the pipe that thefitting marking identifies
NOTE: Any dimensionally consistent system of units may beused.
9.4 Applicability of Test Results
It is not necessary to conduct an individual test offittings with all combinations of sizes, wall thicknesses,and materials. A successful proof test on one representa-tive fitting may represent others to the extent describedin paras. 9.4.1, 9.4.2, and 9.4.3.
9.4.1 Size Range. One test fitting may be used toqualify similarly proportioned fittings with a size rangefrom one-half to twice that for the tested fitting. Thetest of a nonreducing fitting qualifies reducing fittings ofthe same pattern. The test of a reducing fitting qualifiesreductions to smaller sizes.
4
9.4.2 Thickness Range. One test fitting may be usedto qualify similarly proportioned fittings with t⁄D rangesfrom one-half to three times that for the tested fitting.
9.4.3 Material Grades. The pressure retainingcapacity of a geometrically identical fitting made of vari-ous grades of steel will be directly proportional to thetensile properties of the various grades; see para. 2.1.Therefore, it is necessary to test only a single materialgrade in a representative fitting to prove the design ofthe fitting.
10 PRODUCTION TESTS
Hydrostatic testing of wrought fittings is not requiredby this Standard. All fittings shall be capable of with-standing, without leakage or impairment of serviceabil-ity, a hydrostatic test pressure required by the applicablepiping code for seamless pipe of material equivalent tothe fitting material, and of the size and wall thicknessthe fitting marking identifies.
11 TOLERANCES
Tolerances for fittings are shown in Tables 13 and I-12,and apply to the nominal dimensions given in Tables 1through 11 and Tables I-1 through I-11. Where given inthe tables, the minimum and maximum dimensions arebased on these tolerances. The listings with decimals donot imply precision measurement, such as use of vernier,micrometer, electronic readout equipment, etc.
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GENERAL NOTES:(a) All dimensions are in millimeters.(b) See Table 13 for tolerances.(c) Service conditions and joint construction often dictate stub end length requirements. Therefore, the purchaser must specify long or
short pattern fitting when ordering.
NOTES:(1) Gasket face finish shall be in accordance with ASME B16.5 for raised face flanges.(2) The lap thickness T shall not be less than nominal pipe wall thickness. See Table 13 for maximum tolerance.(3) When short pattern stub ends are used with larger flanges in Classes 300 and 600, with most sizes in Classes 900 and higher, and
when long pattern stub ends are used with larger flanges in Classes 1500 and 2500, it may be necessary to increase the length of thestub ends in order to avoid covering the weld with the flange. Such increases in length shall be a matter of agreement between themanufacturer and purchaser.
(4) When special facings such as tongue and groove, male and female, etc., are employed, additional lap thickness must be provided andsuch additional thickness shall be in addition to (not included in) the basic length F.
(5) These dimensions conform to the radius established for lap joint flanges in ASME B16.5.(6) This dimension conforms to standard machined facings shown in ASME B16.5. The back face of the lap shall be machined to conform
to the surface on which it seats. Where ring joint facings are to be applied, use dimension K as given in ASME B16.5.
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GENERAL NOTES:(a) All dimensions are in millimeters.(b) The shape of these caps shall be ellipsoidal and shall conform to the requirements given in the
ASME Boiler and Pressure Vessel Code.
NOTES:(1) Length E applies for thickness not exceeding that given in column “Limiting Wall Thickness for
Length, E.”(2) Length E1 applies for thickness greater than that given in column “Limiting Wall Thickness” for
NPS 24 and smaller. For NPS 26 and larger, length E1 shall be by agreement between the manufac-turer and purchaser.
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ASME B16.9-2007
Table 11 Dimensions of Reducers
H H
Outside Diameter Outside Diameterat Bevel at BevelNominal Pipe Nominal Pipe
Size Large Small End-to-End, Size Large Small End-to-End,(NPS) End End H (NPS) End End H
GENERAL NOTES:(a) All dimensions are in millimeters.(b) While the figure illustrates a bell-shaped reducer, the use of a conical reducer is not prohibited.
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ASME B16.9-2007
Table 12 Welding Bevels and Root Face
19 (0.75)
Note (1) 1.5 (0.06) � 1.0 (0.03) (Root face)
1.5 (0.06) � 1.0 (0.03) (Root face)
22 (0.88)t
D
D
37.5 deg � 2.5 deg
37.5 deg � 2.5 deg
10 deg � 2.5 deg
Rad.
Note (1)
Note (1)
t 22 (0.88) max.
Note (1)
(a) Plain Bevel (b) Compound Bevel
Nominal Wall Thickness, t End Preparation
Less than x [Note (2)] Cut square or slightly chamfer, at manufacturer’s option (not illustrated)x to 22 (0.88), inclusive Plain bevel as in illustration (a) aboveMore than 22 (0.88) Compound bevel as in illustration (b) above
GENERAL NOTES:(a) Dimensions in parentheses are in inches.(b) Other dimensions are in millimeters.
NOTES:(1) See section 8 and Fig. 1 for transition contours.(2) x p 5 (0.19) for carbon steel or ferritic alloy steel and 3 (0.12) for austenitic alloy steel.
17
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ASME B16.9-2007
Fig. 1 Maximum Envelope for Welding End Transitions
2tmin transition region
Radius
Max. slope 1:3
Max. [Note (2)]Min. – 1.0tmin
0.5tmin1.5tmin
Note (4)
Note (5)
Note (3)
Note (1)
30 deg max.
30 deg max.
45 deg max.
0.05tmin
Radius optional
Radius 0.05tmin
tnom tmin
Inside
Inside
Outside
Outside
Component or Fitting
Note (5)
NOTES:(1) The value of tmin is whichever of the following is applicable:
(a) the minimum ordered wall thickness of the pipe, to include pipe that is purchased to a nominal wall thickness with an undertol-erance other than 12.5%
(b) 0.875 times the nominal wall thickness of pipe ordered to a pipe schedule wall thickness that has an undertolerance of 12.5%(2) The maximum thickness at the end of the component is:
(a) the greater of [tmin + 4 mm (0.16 in.)] or 1.15tmin when ordered on a minimum wall basis(b) the greater of [tmin + 4 mm (0.16 in.)] or 1.10tnom when ordered on a nominal wall basis
(3) Weld bevel shown is for illustration only.(4) The weld reinforcement permitted by applicable code may lie outside the maximum envelope.(5) Where transitions using maximum slope do not intersect the inside or outside surfaces within the transition region, as shown by phan-
tom outline, maximum slopes shall be used. Alternatively, radii lying within the envelope may be used.
18
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ASME B16.9-2007
Tabl
e13
Tole
ranc
es
A
AA
Q
Q
O
K
Q
Q
UU
Q
Q
QQ
P
Tees
Th
is e
nd
flu
sh a
gai
nst
sq
uar
e
Cent
er-t
o-En
dA
llFi
ttin
gs[N
otes
(1)
and
(2)]
Dim
ensi
ons
Ove
rall
180
-deg
Retu
rns
Out
side
Insi
de90
-deg
and
45-d
egLe
ngth
ofO
vera
llD
iam
eter
atD
iam
eter
Long
and
Redu
cers
and
Leng
thCe
nter
-to-
Bac
k-to
-B
evel
,D
atEn
dS
hort
Rad
ius
3DR
adiu
sLa
pJo
int
ofCe
nter
Face
Alig
nmen
tN
omin
alPi
pe[N
otes
(3)
[Not
es(3
)El
bow
san
dTe
es,
Elbo
ws,
Stu
bEn
ds,
Caps
,D
imen
sion
,D
imen
sion
,of
Ends
,S
ize
(NPS
)D
Nan
d(4
)]an
d(5
)]A,
B,
C,M
A,B
F,H
EO
KU
1 ⁄ 2to
21 ⁄ 215
–65
+1.6
,−
0.8
0.8
23
23
66
13
to31 ⁄ 2
80–
901.
61.
62
32
36
61
410
01.
61.
62
32
36
61
5to
812
5–20
0+2
.4,
−1.
61.
62
32
66
61
10to
1825
0–45
0+4
.0,
−3.
23.
22
32
610
62
20to
2450
0–60
0+6
.4,
−4.
84.
82
32
610
62
26to
3065
0–75
0+6
.4,
−4.
84.
83
65
10..
...
...
.32
to48
800–
120
0+6
.4,
−4.
84.
85
65
10..
...
...
.
19
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ASME B16.9-2007
Tabl
e13
Tole
ranc
es(C
ont’
d)
Lap
Join
tS
tub
Ends
[Not
e(6
)]A
ngul
arit
yTo
lera
nces
Out
side
Fille
tN
omin
alD
iam
eter
Rad
ius
Nom
inal
Off
Off
Pipe
Siz
eof
Lap,
ofLa
p,La
pPi
peS
ize
Ang
le,
Plan
e,(N
PS)
DN
GR
Thic
knes
s(N
PS)
DN
QP
1 ⁄ 2to
21 ⁄ 215
–65
+0,
−1
+0,
−1
+1.6
,−
01 ⁄ 2
to4
15–
100
12
3t o
31 ⁄ 280
–90
+0,
−1
+0,
−1
+1.6
,−
05
to8
125–
200
24
410
0+0
,−
1+0
,−
2+1
.6,
−0
10to
1225
0–30
03
55
to8
125–
200
+0,
−1
+0,
−2
+1.6
,−
014
to16
350–
400
36
10to
1825
0–45
0+0
,−
2+0
,−
2+3
.2,
−0
18to
2445
0–60
04
1020
to24
500–
600
+0,
−2
+0,
−2
+3.2
,−
026
to30
650–
750
510
26to
3065
0–75
0..
...
...
.32
to42
800–
105
05
1332
to48
800–
120
0..
...
...
.44
to48
110
0–1
200
519
GEN
ERA
LN
OTE
S:
(a)
All
dim
ensi
ons
are
inm
illim
eter
s.(b
)To
lera
nces
are
equa
lpl
usan
dm
inus
exce
ptas
note
d.
NO
TES
:(1
)Th
ein
side
diam
eter
and
the
nom
inal
wal
lth
ickn
esse
sat
ends
are
tobe
spec
ified
byth
epu
rcha
ser.
(2)
Am
inim
umw
all
thic
knes
sof
87.5
%ap
plie
sun
less
the
purc
hase
rsp
ecifi
esa
diff
eren
tw
all
thic
knes
sto
lera
nce.
See
Fig.
1,N
ote
(1)(
a).
(3)
Out
-of-
roun
dis
the
sum
ofab
solu
teva
lues
ofpl
usan
dm
inus
tole
ranc
es.
(4)
This
tole
ranc
em
ayno
tap
ply
inlo
caliz
edar
eas
offo
rmed
fitti
ngs
whe
rein
crea
sed
wal
lth
ickn
ess
isre
quir
edto
mee
tde
sign
requ
irem
ents
ofpa
ra.
2.2.
(5)
Unl
ess
othe
rwis
esp
ecifi
edby
the
purc
hase
r,th
ese
tole
ranc
esap
ply
toth
eno
min
alin
side
diam
eter
,w
hich
equa
lsth
edi
ffer
ence
betw
een
the
nom
inal
outs
ide
diam
eter
and
twic
eth
eno
min
alw
all
thic
knes
s.(6
)S
eeTa
ble
9fo
rlim
itin
gdi
men
sion
sof
outs
ide
diam
eter
ofba
rrel
.
20
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ASME B16.9-2007
MANDATORY APPENDIX IINCH TABLES
This Appendix provides tables of the standard inch dimensions for fittings.
21
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GENERAL NOTES:(a) All dimensions are in inches.(b) See Table I-12 for tolerances.(c) Service conditions and joint construction often dictate stub end length requirements. Therefore, the purchaser must specify long or
short pattern fitting when ordering.
NOTES:(1) Gasket face finish shall be in accordance with ASME B16.5 for raised face flanges.(2) The lap thickness T shall not be less than nominal pipe wall thickness. See Table I-12 for tolerance.(3) When short pattern stub ends are used with larger flanges in Classes 300 and 600, with most sizes in Classes 900 and higher, and
when long pattern stub ends are used with larger flanges in Classes 1500 and 2500, it may be necessary to increase the length of thestub ends in order to avoid covering the weld with the flange. Such increases in length shall be a matter of agreement between themanufacturer and purchaser.
(4) When special facings such as tongue and groove, male and female, etc., are employed, additional lap thickness must be provided andsuch additional thickness shall be in addition to (not included in) the basic length F.
(5) These dimensions conform to the radius established for lap joint flanges in ASME B16.5.(6) This dimension conforms to standard machined facings shown in ASME B16.5. The back face of the lap shall be machined to conform
to the surface on which it seats. Where ring joint facings are to be applied, use dimension K as given in ASME B16.5.
30
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Publisher: The American Society of MechanicalEngineers (ASME), Three Park Avenue, New York,NY 10016-5990; Order Department: 22 Law Drive, P.O.Box 2300, Fairfield, NJ 07007-2300
ASTM A 234/A 234M-06, Standard Specification forPiping Fittings of Wrought Carbon Steel and AlloySteel for Moderate and High Temperature Service
ASTM A 403/A 403M-06, Standard Specification forWrought Austenitic Stainless Steel Piping Fittings
ASTM A 420/A 420M-06, Standard Specification forPiping Fittings of Wrought Carbon Steel and AlloySteel for Low-Temperature Service
35
ASTM A 815/A 815M-04, Standard Specification forWrought Ferritic, Ferritic/Austenitic and MartensiticStainless Steel Piping Fittings
ASTM A 960/A 960M-06, Specification for CommonRequirements for Wrought Steel Piping Fittings
ASTM B 361-02, Standard Specification for Factory-Made Wrought Aluminum and Aluminum-AlloyWelding Fittings
ASTM B 363-06a, Standard Specification for Seamlessand Welded Unalloyed Titanium and Titanium AlloyWelding Fittings
ASTM B 366-04b, Standard Specification for Factory-Made Wrought Nickel and Nickel Alloy Fittings
ASTM E 29-06, Standard Practice for Using SignificantDigits in Test Data to Determine Conformance WithSpecifications
Publisher: ASTM International (ASTM), 100 Barr HarborDrive, West Conshohocken, PA 19428-2959
ISO 6708:1995, Pipework components — Definition andselection of DN (nominal size)
ISO 9000:2000, Quality management systems — Funda-mentals and vocabulary
ISO 9001:2000, Quality management systems — Require-ments
ISO 9004:2000, Quality management systems — Guide-lines for performance improvements
Publisher: International Organization forStandardization (ISO), 1 ch. de la Voie-Creuse, CasePostale 56, CH-1211, Geneve 20, Switzerland/Suisse
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ASME B16.9-2007
NONMANDATORY APPENDIX AQUALITY SYSTEM PROGRAM
The products manufactured in accordance with thisStandard shall be produced under a Quality SystemProgram following the principles of an appropriate stan-dard from the ISO 9000 series.1 A determination of theneed for registration and/or certification of the product
1 The series is also available from the American National Stan-dards Institute (ANSI) and the American Society for Quality (ASQ)as American National Standards that are identified by a prefix“Q” replacing the prefix “ISO.” Each standard of the series is listedin Mandatory Appendix II.
36
manufacturer’s quality system by an independent orga-nization shall be the responsibility of the manufacturer.The detailed documentation demonstrating programcompliance shall be available to the purchaser at themanufacturer’s facility. A written summary descriptionof the program utilized by the product manufacturershall be available to the purchaser upon request. Theproduct manufacturer is defined as the entity whose nameor trademark appears on the product in accordance withthe marking or identification requirements of thisStandard.
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B16 AMERICAN NATIONAL STANDARDS FOR PIPING,PIPE FLANGES, FITTINGS, AND VALVES
The ASME Publications Catalog shows a complete list of all the Standards published by the Society. For a complimentary catalog, or the latestinformation about our publications, call 1-800-THE-ASME (1-800-843-2763).
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ASME B16.9-2007
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