ANSI 16.9

ASME B16.9-2001 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 B16.9-2001 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 B16.9-2001 7/23/01 2:40 PM Page 1 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 FACTORY-MADE WROUGHT BUTTWELDING FITTINGS ASME B16.9-2001 p. 1 05-18-01 10:39:37 Unit: UCP Textfile: B16P9$$$CP p. 1 Date of Issuance: June 22, 2001 This Standard will be revised when the Society approves the issuance of a new edition. There will be no addenda issued to this edition. The next edition of this Standard is scheduled for publication in 2005. ASME will issue written replies to inquiries concerning interpretation of technical aspects of this Standard. ASME is the registered trademark of The American Society of Mechanical Engineers. This code or standard was developed under procedures accredited as meeting the criteria for American National Standards. 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The American Society of Mechanical Engineers Three Park Avenue, New York, NY 10016-5990 Copyright © 2001 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U.S.A. p. 3 05-18-01 08:31:17 Unit: UFW Textfile: B16P9$$$FW p. 3 FOREWORD In 1921, the American Engineering Standards Committee, later American Standards Association (ASA), organized Sectional Committee B16 to unify and further develop national standards for pipe flanges and fittings (and, later, for valves, gaskets, and valve actuators). Cosponsors of the B16 Committee were the American Society of Mechanical Engineers (ASME), the Heating and Piping Contractors National Association [now the Mechanical Contractors Association of America (MCAA)], and the Manufacturers Standardization Society of the Valve and Fittings Industry (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 Committee, 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 coverage of fittings in some sizes. These revisions were approved and published as ASA B16.9-1951 and ASA 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 smaller sizes (NPS 1⁄4 and 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 being redesignated as an American National Standards Committee, another revision increasing the size range 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 current practice and usage. Common fractions were expressed as decimals (but without intending higher precision) and metric dimensional equivalents were added. Provisions for step-wise change of radius for NPS 3⁄4 long radius elbows and 180 deg returns were introduced. Following Standards Committee, 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 Committee operating under procedures accredited by ANSI. In this Edition, the text has been revised and inch dimensions are established as the standard. Following approval by the Standards Committee and ASME, approval as an American National Standard was given by ANSI on November 12, 1986 with the new designation ASME/ANSI B16.9-1986. In 1991 the Subcommittee reviewed the document and made a number of revisions. Dimensions for short pattern lap joints were also added to this 1993 Edition of the Standard. In this 2001 Edition, short radius elbows and returns were added which includes all dimensions and tolerances of ASME B16.28-1994. This Edition also provides metric units as an independent but parallel alternative standard to U.S. Customary units and a Quality System Program Annex. iii p. 4 05-18-01 08:31:17 Unit: UFW Textfile: B16P9$$$FW p. 4 Requests for interpretation or suggestions for revision should be sent to the Secretary, B16 Committee, The American Society of Mechanical Engineers, Three Park Avenue, New York, NY 10016. This Standard was approved as an American National Standard on April 6, 2001. iv p. 5 05-18-01 08:31:55 Unit: UCR Textfile: B16P9$$$CR p. 5 ASME STANDARDS COMMITTEE B16 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 H. R. Sonderegger, Vice Chair P. Reddington, Secretary COMMITTEE PERSONNEL W. L. Ballis, Columbia Gas Distribution Co. J. E. Batey, Union Carbide Corp. K. M. Bell, Underwriter’s Laboratory, Inc. M. L. Blair, U.S. Coast Guard R. R. Brodin, Fisher Controls International, Inc. A. Cohen, Copper Development Association W. C. Farrell, Jr., Consultant C. E. Floren, Mueller Co. D. R. Frikken, Monsanto Co. M. W. Garland, Frick Co. J. B. Hagen, ABS Americas J. C. Inch, Mueller Brass Co. J. S. John, J Square Engineering Co. G. A. Jolly, Vogt Valve Co. W. G. Knecht, Anchor/Darling Valve Co. R. Koester, The William Powell Co. J. H. Longacre, Nibco, Inc. J. H. McCauley, Jr., James H. McCauley, Inc. W. N. McLean, Newco Valves A. F. Rhodes, Arnco Technology Trust F. C. Rosch, Jr., Techincon Enterprises, Inc. R. A. Schmidt, Ladish Co. H. R. Sonderegger, Tyco Flow Control W. M. Stephan, Flexitallic Inc. T. F. Stroud, Ductile Iron Pipe Research Association R. E. White, Repairs, Inc. D. A. Williams, Southern Company Services L. A. Willis, Dow Chemical Co. SUBCOMMITTEE F — STEEL THREADED AND WELDING FITTINGS G. A. Jolly, Chairman, Vogt Valve Co. S. J. Rossi, Secretary, The American Society of Mechanical Engineers P. R. Benavides, Tube Forgings of American, Inc. G. A. Cuccio, Capitol Manufacturing J. P. Ellenberger, WFI International D. R. Frikken, Monsanto Co. v p. 6 05-18-01 08:31:55 Unit: UCR Textfile: B16P9$$$CR p. 6 R. E. Johnson, Consultant R. C. Lafferty, Penna Machine Works, Inc. D. H. Monroe, Consultant R. A. Schmidt, Ladish Co. H. R. Sonderegger, Tyco Flow Control L. A. Willis, Dow Chemical Co. W. R. Worley, Union Carbide vi p. 7 05-18-01 08:32:13 Unit: UCT Textfile: B16P9$$$CT p. 7 CONTENTS Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii Committee Roster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v 1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1 1General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 1Special Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 1Fabricated Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4 1Standard Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 1References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6 1Service Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.7 1Welding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 1Quality Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.9 1Convention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Pressure Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.1 1Basis of Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 2Design of Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4.1 2Standard Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2 2Exceptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3 2Depth of Stamping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4 2Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 6 Fitting Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 6.1 3General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.2 3Special Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Surface Contours . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 8 End Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 9 Design Proof Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 9.1 3Required Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.2 3Test Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.3 3Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.4 4Applicability of Test Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Production Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 vii p. 8 05-18-01 08:32:13 Unit: UCT Textfile: B16P9$$$CT p. 8 11 Tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 1 Maximum Envelope for Welding End Transitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Tables 1 Welding Bevels and Root Face . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 Tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 Dimensions of Long Radius Elbows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4 Dimensions of Long Radius-Reducing Elbows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5 Dimensions of Long Radius Returns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6 Dimensions of Short Radius Elbows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7 Dimensions of Short Radius 180 Deg Returns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 8 Dimensions of Straight Tees and Crosses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 9 Dimensions of Reducing Outlet Tees and Reducing Outlet Crosses . . . . . . . . . . . . . . . . . 12 10 Dimensions of Lap Joint Stub Ends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 11 Dimensions of Caps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 12 Dimensions of Reducers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Mandatory Appendices I Inch Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 II References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Nonmandatory Appendices A Quality System Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 viii p. 1 05-18-01 10:54:29 Unit: U1 Textfile: B16P9$0001 p. 1 ASME B16.9-2001 FACTORY-MADE WROUGHT BUTTWELDING FITTINGS 1 SCOPE 1.1 General This Standard covers overall dimensions, tolerances, ratings, testing, and markings for wrought factory-made buttwelding fittings in sizes NPS 1⁄2 through 48 (DN 15 through 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 pipe fabrication, and are not within the scope of this Standard. 1.4 Standard Units The values stated in either metric or U.S. Customary units are to be regarded separately as standard. Within the text, the U.S. Customary units are shown in parentheses. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with this Standard. The designations for pressure rating and size are Class and NPS for both metric and customary dimen- sioned fittings. The designations PN and DN used in international standards are shown for reference conve- nience. 1.5 References 1.5.1 Referenced Standards. Standards and spec- ifications adopted by reference in this Standard are shown in Mandatory Appendix II. It is not considered practical to identify the specific edition of each standard and specification in the individual references. Instead, the specific edition reference is identified in Mandatory Appendix II. A product made in conformance with a prior edition of reference standards and in all other respects conforming to this Standard will be considered to be in conformance. 1 1.5.2 Codes and Regulations. A fitting used under the jurisdiction of the ASME Boiler and Pressure Vessel Code, the ASME Code for Pressure Piping, or a governmental regulation is subject to any limitation of that code or regulation. This includes any maximum temperature limitation, or rule governing the use of a material at low temperature. 1.6 Service Conditions Criteria for selection of fitting types and materials suitable for particular fluid service are not within the scope of this Standard. 1.7 Welding Installation welding requirements are outside the scope of this Standard. 1.8 Quality Systems Nonmandatory requirements relating to the fitting manufacturer’s Quality System Program are described in Nonmandatory Appendix A. 1.9 Convention For the purpose of determining conformance with this Standard, the convention for fixing significant digits where limits, maximum or minimum values, are speci- fied shall be rounded off as defined in ASTM E 29. This requires that an observed or calculated value shall be ‘‘rounded off’’ to the nearest unit in the last right- hand digit used in expressing the limit. Decimal value in the last and tolerances do not imply a particular method of measurement. 2 PRESSURE RATINGS 2.1 Basis of Ratings The allowable pressure ratings for fittings designed in accordance with this Standard may be calculated as for straight seamless pipe of equivalent material (as shown by comparison of composition and mechanical properties in the respective material specifications) in accordance with the rules established in the applicable p. 2 05-18-01 10:54:29 Unit: U1 Textfile: B16P9$0001 p. 2 FACTORY-MADE WROUGHT BUTTWELDING FITTINGSASME B16.9-2001 sections of ASME B31, Code for Pressure Piping. For the calculation, applicable data for the pipe size, wall thickness, and material that is 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. 2.2 Design of Fittings The design of fittings shall be established by mathe- matical analyses (e.g. ASME B16.49 for bends) con- tained in nationally recognized pressure vessel or piping codes or at the manufacturer’s option by proof testing in accordance with section 9 of this Standard. In order to meet design or manufacturing requirements, it is expected that some portion of formed fittings may have to be thicker than the pip