Cast Copper Alloy Solder Joint Pressure Fittings

AN AMERICAN NA TIONAL S T AND ARD

ASME B16.18-2012

[Revision of ASME B16.18-2001 (R2005)]

Cast Copper Alloy Solder Joint Pressure Fittings

AN AMERICAN NA TIONAL S T AND ARD

Three Park Avenue • New York, NY • 10016 USA

Date of Issuance: February 22, 2012

The next edition of this Standard is scheduled for publication in 2017.

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

Copyright © 2012 by

THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS

All Rights Reserved Printed in U.S.A.

CONTENTS

Foreword v

Committee Roster vii

Correspondence With the B16 Committee viii

Summary of Changes ix

1. Scope 1

2. General 1

3. Pressure–Temperature Ratings 1

4. Fitting Size and Ends 1

5. Marking 1

6. Material 2

7. Metal Thickness 2

8. Inspection Tolerance 2

9. Threaded Ends 2

10. Configuration of Threaded Ends 3

11. Production Testing 3

Figure

1 Method of Designating Openings of Fittings 4

Tables

1. Internal Pressure–Temperature Ratings for Cast Copper Alloy

   Fittings, psi (kPa) 6

2. Inspection Tolerances 7

3. Dimensions of Solder Joint Ends 8

4. Dimensions of Elbows, Tees, and 45-deg Elbows 9

5. Dimensions of Reducing 90-deg Elbows 11

6. Dimensions of Reducing Tees 12

7. Dimensions of Couplings 15

8. Dimensions of Caps and Plugs 17

9. Dimensions of Fitting Reducers 17

10. Dimensions of Solder Joint Elbows and Tees With Pipe Thread Ends

    (Straight Sizes) 18

11. Dimensions of Solder Joint Elbows and Tees With Pipe Thread Ends

    (Reducing Sizes) 20

12. Dimensions of Solder Joint Adapters and Fitting Adapters With Pipe Thread

    Ends (Straight and Reducing Sizes) 22

13. Dimensions of Return Bends (Straight Sizes) 23

14. Dimensions of Supply and Return Tees 23

15. Dimensions of Baseboard Tees (F F C) 23

16. Dimensions of Tees 23

17. Dimensions of Baseboard Tees (C F C) 24

18. Dimensions of Flush Bushings (FTG C) 24

19. Dimensions of Flush Bushings (FTG F) 24

iii

iv

FOREWORD

This American National Standard for solder joint fittings was originally developed by a subcom- mittee of American Standards Association (ASA) Sectional Committee A40 on Minimum Requirements for Plumbing and Standardization of Plumbing Equipment, organized in August 1928, under the procedures of the ASA. Subcommittee No. 11 on Solder-Joint Fittings for Tubing was appointed in October 1936.

At its first meeting, the subcommittee was informed of the investigation of solder joints being carried out by the National Bureau of Standards (now the National Institute of Standards and Technology). It was decided that the committee’s scope should cover only solder fittings for use in plumbing. A subgroup was appointed to study the tolerances of commercial fittings, including depth of bore, laying lengths, and diameters of copper tube.

A draft standard was sent to the subcommittee in February 1939; a revision was distributed in August to selected organizations and individuals for review. A new subcommittee draft dated April 1940 was approved by Sectional Committee A40, the sponsor, and following ASA approval, was published in January 1941 as ASA A40.3-1941.

In 1949, the sponsors agreed to transfer responsibility for solder joint fittings to Sectional Committee B16 of ASA, because the fittings were being used in many applications other than plumbing. Subcommittee 9, Standardization of Solder Joint Fittings was established and charged with developing a revised standard. An April 1949 draft was distributed for industry review, resulting in recommended changes. A new draft was approved by Sectional Committee B16, sponsor organizations, and ASA and published as ASA B16.18-1950.

Work began in 1958 on a revision, including improvements in language. It was approved by B16, sponsor organizations, and ASA and published as ASA B16.18-1963. Starting in 1969, a comprehensive review resulted in revisions to clarify the text and to permit additional material. Final approval was granted by the American National Standards Institute (formerly ASA) on March 2, 1972, for publication as ANSI B16.18-1972.

The subcommittee, now Subcommittee I, began a new revision on 1974, resulting in the addition of supply and return tees, baseboard tees, and flush bushings, as well as metrication, and change of “bronze” to “copper alloy.” The draft finally approved was published as ANSI B16.18-1978.

In 1982, American National Standards Committee B16 became the ASME B16 Standards Committee, operating with the same scope under ASME procedures accredited by ANSI. Subse- quently, Subcommittee I merged with Subcommittee J, which had a related scope. A general review was then started, resulting in a number of editorial changes and a few pictorial corrections. Table 2 (now Table 3) was updated to three place decimals from four, bringing the table more in line with practical gaging methods. Table B2 (now Table I-3) was correspondingly corrected. Following approval by Subcommittee J, the B16 Standards Committee, and ASME, the American National Standards Institute granted approval on January 13, for publication as ANSI B16.18-1984. The standard was reaffirmed in 1994 with no change.

The 2001 edition of B16.18 contained a defined bursting strength, defined standard gaging method of threaded ends, and other clarifications and updates to text. Following approval by the Standards Committee and ASME, approval as an American National Standard was given on October 17, 2001 with the designation ASME B16.18-2001.

In this edition, new copper alloys were added for potable water applications. Also, references to ASME standards were revised to no longer list specific edition years; the latest edition of ASME publications applies unless stated otherwise. Materials manufactured to other editions of the referenced ASTM standards have been permitted to be used to manufacture fittings meeting the requirements of this Standard as long as the fitting manufacturer verifies the material meets

v

the requirements of the referenced edition. Following approval by the B16 Standards Committee and the ASME Board on PTCS, this revision to the 2001 edition was approved as an American National Standard by ANSI on January 13, 2012 with the new designation, ASME B16.18-2012. Requests for interpretations and suggestions for revision should be sent to the Secretary, B16 Committee, The American Society of Mechanical Engineers, Three Park Avenue, New York,

NY 10016-5990.

vi

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

D. R. Sharp, 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 Valves/Flowserve Corp.

M. Kachter, Haynes International

W. N. McLean, B&L Engineering

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

D. F. Buccicone, Elkhart Products Corp.

A. M. Cheta, Royal Dutch Shell

M. A. Clark, Nibco, Inc.

G. A. Cuccio, Capitol Manufacturing Co.

1. E. Davila, Crane Energy

2. R. Frikken, Becht Engineering Co.

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

T. A. McMahon, Emerson Process Management

M. L. Nayyar, Bechtel Power Corp.

W. H. Patrick, The Dow Chemical Co.

R. A. Schmidt, Canadoil

D. R. Sharp, The American Society of Mechanical Engineers

H. R. Sonderegger, Fluoroseal, Inc.

W. M. Stephan, Flexitallic, L.P.

F. R. Volgstadt, Volgstadt and Associates, Inc.

D. A. Williams, Southern Company Generation

SUBCOMMITTEE J — COPPER AND COPPER ALLOY FLANGES, FLANGED FITTINGS, AND SOLDER JOINT FITTINGS

M. A. Clark, Chair, Nibco, Inc.

D. F. Buccicone, Vice Chair, Elkhart Products Corp.

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

J. A. Ballanco, JB Engineering and Code Consulting, P.C.

S. L. Cavanaugh, Cavanaugh Consulting

A. Ciechanowski, NSF International

D. R. Frikken, Becht Engineering Co.

M. Gillespie, Viega LLC

T. L. Jamison, Mueller Industries, Inc.

A. G. Kireta, Jr., Copper Development Association, Inc.

A. A. Knapp, A. Knapp and Associates

R. M. McKenzie, Alternate, Mueller Fittings Co., Inc.

C. Mueller, Mueller Industries, Inc.

C. Stout, Mueller Industries, Inc.

vii

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 Three 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.

viii

ASME B16.18-2012 SUMMARY OF CHANGES

Following approval by the ASME B16 Committee and ASME, and after public review, ASME B16.18-2012 was approved by the American National Standards Institute on January 13, 2012.

ASME B16.18-2012 includes the following changes identified by a margin note, (12). In addition, in the main text, the “General” section was moved to section 2, and the subsequent sections and their paragraphs were renumbered accordingly.

revised

(2) Value for Standard Water Tube Size 11⁄4 at 400°F (204°C) revised

44 Mandatory Appendix II Updated

ix

INTENTIONALLY LEFT BLANK

x

ASME B16.18-2012

CAST COPPER ALLOY SOLDER JOINT PRESSURE FITTINGS

1. SCOPE

   This Standard for cast copper alloy solder joint pres- sure fittings designed for use with copper water tube establishes requirements for

   1. pressure–temperature ratings

   2. abbreviations for end connections

   3. sizes and method of designating openings of fittings

   4. marking

   5. material

   6. dimensions and tolerances

   7. tests

      
      

2. GENERAL

1. Relevant Units

   This Standard states values in both SI (Metric) and

   U.S. Customary units. These systems of units are to be regarded separately as standard. Within the text, the SI units are shown in parentheses or in separate tables that appear in Mandatory Appendix I. The values stated in each system are not exact equivalents; therefore, it is required that each system of units be used indepen- dently of the other. Combining values from the two systems constitutes nonconformance with the Standard.

2. References

   Standards and specifications adopted by reference in this Standard are shown in Mandatory Appendix II, which is part of this Standard. It is not considered practi- cal 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.

3. Quality System

Requirements relating to the product manufacturer’s quality system programs are described in Nonmandatory Appendix C.

1. PRESSURE–TEMPERATURE RATINGS

   1. Rating of Fitting and of Joint

      The internal pressure–temperature ratings of the fit- tings are shown in Table 1.

      The internal pressure–temperature rating for a solder joint fitting is dependent not only on fitting and tube

      strength, but also on the composition of the solder used for the joint and selection of valves and appurtenances. The internal pressure–temperature rating of the sys- tem shall be the lowest of the values shown in Table 1, the solder joint, and those of the tube, valves, or

      appurtenances.

      The maximum recommended pressure–temperature ratings for solder joints using the dimensions of Table 3 and Table I-3, made with typical commercial solders, are given in Nonmandatory Appendix A.

      
      

   2. Bursting Strength

      Burst strength at 73°F ± 5°F (23°C ±2°C) shall not be less than four times the 100°F (38°C) internal working- pressure rating shown in Table 1. For reducing fittings, the applicable internal working pressure shall be that of the largest size of end connection.

      
      

2. FITTING SIZE AND ENDS

   The size of the fittings shown in Table 3 and Table A-1 corresponds to standard water tube size as shown in ASTM B88, Standard Specification for Seamless Copper Water Tube. The size of the threaded ends corresponds to nominal pipe size as shown in ANSI/ASME B1.20.1.

   Fittings are designated by the size of the openings in the sequence illustrated in Fig. 1.

   The following symbols are used to designate the type of fitting end:

   C p solder-joint fitting end made to receive copper tube diameter (female)

   F p internal ANSI standard taper pipe thread (female) NPT

   FTG p solder-joint fitting end made to copper tube diameter (male)

   M p external ANSI standard taper pipe thread (male) NPT

   
   

3. MARKING

Each fitting shall be permanently marked with the manufacturer’s name or trademark and other applicable markings as required by MSS SP-25. Marking of fittings less than Standard Water Tube Size 1⁄2, or on any fitting where it damages soldering surfaces is not required.

Fittings manufactured from cast copper alloys con- taining silicon shall be permanently marked with the designation Si.

(12)

1