Valves — Flanged, Threaded, and Welding End

AN A MERICAN NA TIONAL S T AND ARD

ASME B16.34-2013

(Revision of ASME B16.34-2009)

ASME B16.34-2013

(Revision of ASME B16.34-2009)

Valves — Flanged, Threaded, and Welding End

AN AMERICAN NA TIONAL S T AND ARD

Two Park Avenue • New York, NY • 10016 USA

Date of Issuance: March 29, 2013

The next edition of this Standard is scheduled for publication in 2015.

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The American Society of Mechanical Engineers Two Park Avenue, New York, NY 10016-5990

Copyright © 2013 by

THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS

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CONTENTS

Foreword v

Committee Roster viii

Correspondence With the B16 Committee ix

Introduction x

Summary of Changes xi

1. Scope 1

2. Pressure–Temperature Ratings 2

3. Nominal Pipe Size 4

4. Marking 4

5. Materials 5

6. Dimensions 6

7. Pressure Testing 10

8. Requirements for Special Class Valves 11

Figures

1. Method of Designating Location of Auxiliary Connections When Specified 14

2. Butterfly Valve Body 15

3. Thread Length for Auxiliary Connections 16

4. Bosses for Auxiliary Connections 16

5. Socket Welding for Auxiliary Connections 16

6. Butt Welding for Auxiliary Connections 17

7. Gate Body (Pressure Seal Bonnet) 17

8. Y Pattern Globe Body (Pressure Seal Bonnet) 18

9. Angle Body (Pressure Seal Bonnet): Bonnet Same as Y Pattern Globe 18

10. Elbow Down (Pressure Seal Bonnet) 19

11. Gate Body (Flanged Bonnet) 19

12. Globe Body (Flanged Bonnet) 20

13. Butterfly Body 20

14. Plug Body 21

15. Conduit Gate Body (Pressure Seal Bonnet) 21

16. Dished Cover 22

17. Flat Cover 22

Tables

1. Material Specification List: Applicable ASTM Specification 23

2. Pressure–Temperature Ratings 28

3A Valve Body Minimum Wall Thickness, tm, mm 95

3B Valve Body Minimum Wall Thickness, tm, in 98

4 Minimum Wall Thickness for Socket Welding and Threaded Ends 101

Mandatory Appendices

1. Radiography Examination: Procedure and Acceptance Standards 103

2. Magnetic Particle Examination: Procedure and Acceptance Standards 105

3. Liquid Penetrant Examination: Procedure and Acceptance Standards 106

4. Ultrasonic Examination: Procedure and Acceptance Standards 107

5. Requirements for Limited Class Valves 108

6. Basis Equations for Minimum Wall Thickness 111

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7. Pressure–Temperature Ratings: U.S. Customary Units 113

8. References 179

Nonmandatory Appendices

1. Relationship Between Nominal Pipe Size and Inside Diameter 182

2. Method Used for Establishing Pressure–Temperature Ratings 184

3. Quality System Program 191

iv

FOREWORD

In December 1969, American National Standards Committee B16 changed its name from Standardization of Pipe Flanges and Fittings to Standardization of Valves, Fittings, and Gaskets, reflecting American National Standards Institute (ANSI) approval of a broadened scope for the B16 Committee. At the same meeting, the committee approved a plan for the organization of a subcommittee to develop a new standard for steel valves with other than flanged ends. Subsequently, B16 Subcommittee 15 was appointed and held its first meeting in December 1970. Historically, in the development of standards and pressure–temperature ratings for steel valves, the various rating classes for flanges provided an obviously logical basis for valve ratings. Steel valves with flanges of standard dimensions, many also offered in buttwelding-end versions, were given the same pressure–temperature ratings as the flanges. In 1949, a new edition of the Standard, then designated B16e-1949, was published, in which a table covering wall thickness requirements for weld end valves had been added. In 1964, the Manufacturer’s Standardization Society of the Valve and Fittings Industry developed and published Standard Practice SP 66, covering pressure– temperature ratings of steel buttwelding-end valves. SP 66 introduced a new method for establish- ing ratings by making ratings a function of the mechanical strength properties of the body material at all temperatures. Following the publication of SP 66, B16 activated Subcommittee 4 for the purpose of studying the general subject of pressure–temperature ratings and developing rational

criteria for such ratings.

In the B16 charge to Subcommittee 15, it was established that the new Standard would replace SP 66 and also remove the reference to buttwelding-end valves from B16.5. Flanged-end valves would continue to be covered in B16.5 but on a fully specified basis, rather than as an add-on. As the work of the subcommittee got underway, concurrent action was initiated in Subcommittee

3 for revision of B16.5. Subsequent operations of Subcommittees 3 and 15 were closely coordinated to provide assurance that the new Standard and the revised B16.5 would be compatible.

A key and basic issue of mutual concern in this coordination was the matter of pressure– temperature ratings. It was necessary to incorporate the SP 66-type ratings in the new Standard, but at the same time also to provide ratings equivalent to those in B16.5 covering the buttwelding equivalents of flanged-end valves. Subcommittee 4 had made definitive recommendations for revisions in the flange ratings and it was obviously desirable to rationalize the two types of ratings as they would appear side-by-side in the new Standard.

The results of these efforts appear herein in the form of pressure–temperature ratings tables. The method of computing the ratings is detailed in Nonmandatory Appendix B. The ratings differ from the pre-1968 B16.5 ratings because they are now calculated as a function of the mechanical properties of the pressure boundary materials, in contrast to the empirical basis used previously. A change in the SP 66-type rating (herein designated Special Class) discontinues the application of a plasticity factor at elevated temperatures which, in the opinion of the committee, could not be justified in dimension-sensitive valves.

Other innovations include the coverage of forged or fabricated body valves and an increase in detailed coverage by pressure–temperature ratings from 17 materials in B16.5 to 24 material groups in the new Standard and in the revised B16.5. Dimensional requirements have been refined and augmented to give the designer more latitude and the user more assurance of adequacy. A number of the innovations have had trial use and at least some degree of acceptance, as they have been taken from the section on valve requirements developed and published by the ASME Boiler and Pressure Vessel Code to cover valves used in nuclear power plants. A section on valve testing eliminates uncertainties on such points as seat test requirements and stem seal testing.

Approval for the 1973 edition of the Standard by ANSI was granted in October 1973.

In December 1973, a reorganization of the subcommittee structure for B16 was approved. Subcommittee 15 was redesignated as Subcommittee N and was assigned responsibility for all steel valves. Work began to include coverage for flanged-end valves in ANSI B16.34. The 1977

v

edition contained flanged-end valve requirements formerly in ANSI B16.5. The rating procedures of B16.5 were adopted and made applicable to Standard Class buttwelding-end valves. The method of deriving ratings was revised. Major changes were made in the method for determining ratings for austenitic stainless steel valves and ratings for Class 150 valves for all materials. The pressure–temperature tables and materials groups were rearranged and revised using data from the reference Sections of the ASME Boiler and Pressure Vessel Code through the Summer 1975 Addenda. A number of clarifying and editorial revisions were also made in order to improve the text. It was also resolved that frequent minor changes in pressure–temperature ratings because of revisions to the reference material strength property tables should be avoided and that, as a general guide, such changes should not be considered unless resulting ratings would be changed by an amount in excess of 10%.

Approval for the 1977 edition of the Standard by ANSI was granted on June 16, 1977.

During 1979, work began on the 1981 edition. Materials coverage was expanded. Nickel alloys and other alloys were added. Bolting rules were revised to accommodate special alloy bolting for the new materials. Revisions were included to clarify requirements for rotary motion valves, e.g., ball valves and butterfly valves. Wafer-type valves were specifically identified. Other clarify- ing and editorial revisions were made in order to improve the text.

Following approvals by the Standards Committee and Secretariat, approval for the 1981 edition was granted by ANSI on August 14, 1981.

During 1985, revisions were proposed that added requirements for socket welding-end and threaded-end valves. The inclusion of requirements for these valves increased the scope of the Standard. Also, the listings for nickel alloy and other alloy valves materials were expanded. Rules for threaded body joints were added, and wafer-type valve body rules improved.

Following approvals by the Standards Committee and ASME, approval for the 1988 edition was granted by ANSI on February 24, 1988.

During 1993 and carrying over into 1994, revisions offered included multiple material marking and an improved interpolation procedure. New materials were added and the pressure– temperature rating tables were recalculated in accordance with Nonmandatory Appendix B using the latest data available from the reference ASME Boiler and Pressure Vessel Code sources. An appendix was added covering nonmandatory requirements for a quality system program.

Following the approvals the Standards Committee and ASME, approval for the new edition was granted by ANSI on October 3, 1996.

Work was started during 1999 to revise the Standard to include metric units as the primary reference units while maintaining U.S. customary units in either parenthetical or separate forms. The goal is to delete the U.S. customary units in a future revision. All pressure-temperature ratings have been recalculated using data from the latest edition of the ASME Boiler and Pressure Vessel Code, Section II, Part D. As a result, some materials have been shifted to other material groups and some changes were made to some valve ratings within material groups. Because of diminished interest for flanged end valves conforming to ASME Class 400, they are not specifically listed in this revision. Flanges for Class 400 will continue to be listed in B16 flange standards. Provisions were made to allow Class 400 valves to be furnished as intermediate rated valves. Numerous requirement clarifications and editorial revisions were also made.

Work was started during 2007 to revise the Standard. Metric units remained the primary reference units with U.S. Customary units in either parenthetical or separate forms shown as in the earlier edition. Pressure–temperature ratings, in some cases, were revised, and new materials were added, all in keeping with the material properties provided in the latest edition of the ASME Boiler and Pressure Vessel Code, Section II, Part D. A number of requirement clarifications and editiorial revisions were also made.

Following the approvals of the Standards Committee and ASME, approval for the 2009 edition was granted by ANSI on June 18, 2009.

Work was started during 2009 to correct material listings with the material groups. Additionally, B16.47 was added as a reference, and flanged-end valves coverage was expanded to NPS 50. A number of requirement clarifications and editorial revisions have also been made.

vi

Following the approvals of the Standards Committee and ASME, approval for the new edition was granted by ANSI on February 19, 2013.

All requests for interpretation or suggestions for revisions should be sent to the Secretary, B16 Committee, The American Society of Mechanical Engineers, Two Park Avenue, New York, NY 10016-5990.

vii

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

W. B. Bedesem, Chair

G. A. Jolly, Vice Chair

C. E. O’Brien, Secretary

A. Appleton, Alloy Stainless Products Co., Inc.

R. W. Barnes, ANRIC Enterprises, Inc.

W. B. Bedesem, Consultant

STANDARDS COMMITTEE PERSONNEL

G. A. Jolly, Vogt Valve/Flowserve Corp.

M. Katcher, Haynes International

W. N. McLean, B&L Engineering

R. M. Bojarczuk, ExxonMobil Research & Engineering Co.

D. F. Buccicone, Consultant

A. M. Cheta, Shell Exploration and Production Co.

M. A. Clark, NIBCO, Inc.

G. A. Cuccio, Capitol Manufacturing Co.

1. E. Davila, Crane Energy

2. R. Frikken, Becht Engineering Co., Inc.

R. P. Griffiths, U.S. Coast Guard

T. A. McMahon, Emerson Process Management

M. L. Nayyar, Bechtel Power Corp.

C. E. O’Brien, The American Society of Mechanical Engineers

W. H. Patrick, The Dow Chemical Co.

R. A. Schmidt, Canadoil

H. R. Sonderegger, Fluoroseal, Inc.

W. M. Stephan, Flexitallic, LP

F. R. Volgstadt, Consultant

D. A. Williams, Southern Co. Generation

SUBCOMMITTEE N — STEEL VALVES AND FACE-TO-FACE AND END-TO-END DIMENSIONS OF VALVES

T. A. McMahon, Chair, Emerson Process Management

G. A. Jolly, Vice Chair, Vogt Valves/Flowserve Corp.

A. P. Maslowski, Secretary, The American Society of Mechanical Engineers

R. W. Barnes, ANRIC Enterprises, Inc.

W. B. Bedesem, Consultant

R. A. Benjamin, Newport News Shipbuilding

R. M. Bojarczuk, ExxonMobil Research & Engineering Co.

T. R. Brooks, Consultant

A. M. Cheta, Shell Exploration and Production Co.

C. E. Davila, Crane Energy

R. T. Faircloth, Cameron

1. R. Frikken, Becht Engineering Co., Inc.

2. Gulgun, Contributing Member, International Standard Valve, Inc.

R. B. Hai, RBH Associates

J. R. Holstrom, Val-Matic Valve & Manufacturing Corp.

M. Katcher, Haynes International

W. N. McLean, B&L Engineering

M. L. Nayyar, Bechtel Power Corp.

W. H. Patrick, The Dow Chemical Co.

D. W. Rahoi, CCM 2000

K. E. Reid, Parker-Hannifin

H. R. Sonderegger, Fluoroseal, Inc.

1. Sumner, Conval, Inc.

2. E. Tezzo, Tyco Valves & Controls

J. P. Tucker, Flowserve Corp.

G. T. Walden, Wolseley

M. M. Zaidi, Jacobs Engineering Group, Inc.

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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, and attending Committee meetings. Corre- spondence should be addressed to:

Secretary, B16 Standards Committee

The American Society of Mechanical Engineers Two Park Avenue

New York, NY 10016-5990

As an alternative, inquiries may be submitted via email to: SecretaryB16@asme.org.

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 for the purpose of providing 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, 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 Committee will render an interpretation of any require- ment of the Standard. Interpretations can only be rendered in response to a written request sent to the Secretary of the B16 Standards Committee.

The request for 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.

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. 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.

Requests that are not in this format will be rewritten in this format by the Committee prior to being answered, which may inadvertently change the intent of the original request.

ASME procedures provide for reconsideration of any interpretation when or if additional information that might affect an interpretation is available. Further, persons aggrieved by an interpretation 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, which are open to the public. Persons wishing to attend any meeting should contact the Secretary of

the B16 Standards Committee.

ix

INTRODUCTION

An American National Standard is intended as a basis for common practice by the manufacturer, the user, and the general public. The existence of an American National Standard does not in itself preclude the manufacture, sale, or use of products not conforming to the standard. Mandatory conformance is established, for example, by reference to the standard in a code, specification, sales contract, or public law.

It should be noted, specifically regarding this Standard, that certain requirements reflecting the general application of valves in a wide variety of services may not be considered to be appropriate for some valves whose application is known and which may incorporate certain features found by successful experience to be satisfactory. A specific case in point is that involving valves developed and used in gas and petroleum product pipelines. Conformance of such valves to the existing API 6D may by itself be sufficient to satisfy requirements of federal rules and regulations established by the Department of Transportation, Office of Pipeline Safety Operations. Another specific case is that involving valves used in instrument systems under an applicable piping code. Conformance of such valves to the requirements of an existing piping code may by itself be sufficient to satisfy jurisdictional rules and regulations.

This edition of ASME B16.34 states values in both Metric and U.S. Customary units of measure- ment. These systems of units are to be regarded separately. The values stated in each system are not exact equivalents; therefore each system shall be used independently of the other. Combining values from the two systems constitutes nonconformance with this Standard.

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ASME B16.34-2013 SUMMARY OF CHANGES

Following approval by the ASME B16 Committee and ASME, and after public review, ASME B16.34-2013 was approved by the American National Standards Institute on February 19, 2013.

ASME B16.34-2013 includes the following changes identified by a margin note, (13).

revised

16 Fig. 5 Penultimate value in second row corrected by errata

23–25 Table 1 (1) For material Group No. 2.1, A351 CF3 added under Castings

1. For material Group No. 2.2, A351 CF3M added under Castings

2. For material Group No. 2.3, A351 CF3 and A351 CF3M deleted under Castings

3. For material Group No. 2.5, A351 CF8C deleted under Castings

revised

103 I-1.1 Revised

I-1.5 Reference revised

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