Refrigeration Piping and Heat Transfer Components

ASME Code for Pressure Piping, B31

AN A MERICAN NA TIONAL S T AND ARD

ASME B31.5-2013

(Revision of ASME B31.5-2010)

ASME B31.5-2013

(Revision of ASME B31.5-2010)

Refrigeration Piping and Heat Transfer Components

ASME Code for Pressure Piping, B31

AN AMERICAN NA TIONAL S T AND ARD

Two Park Avenue • New York, NY • 10016 USA

Date of Issuance: May 31, 2013

The next edition of this Code is scheduled for publication in 2016.

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CONTENTS

Foreword v

Committee Roster vi

Introduction ix

Summary of Changes xi

iii

Nonmandatory Appendices

1. Referenced Standards 75

2. Preparation of Technical Inquiries 78

3. Selecting Applicable Piping Codes 79

4. Nomenclature 81

iv

FOREWORD

The need for a national code for pressure piping became increasingly evident from 1915 to 1925. To meet this need, the American Engineering Standards Committee (later changed to American Standards Association, then changed to United States of America Standards Institute, and now known as the American National Standards Institute) initiated project B31 in March 1926, at the request of the American Society of Mechanical Engineers and with that Society the sole administrative sponsor. Because of the wide field involved, Sectional Committee B31, later changed to Standards Committee, was composed of representatives of some 40 different engineering societies, industries, government bureaus, institutes, and trade associations. After several years’ work, the first edition was published in 1935 as an American Tentative Standard Code for Pressure Piping.

In order to keep the Code abreast of current develop- ments in piping design, welding, stress computations, new dimensional and material standards and specifica- tions, and increases in the severity of service conditions, revisions, supplements, and new editions of the Code were published as follows:

B31.1-1942 American Standard Code for Pressure Piping

B31.1a-1944 Supplement 1

B31.1b-1947 Supplement 2

B31.1-1951 American Standard Code for Pressure Piping

B31.1a-1953 Supplement 1 to B31.1-1951

B31.1-1955 American Standard Code for Pressure Piping

In 1952, a new section of the Code was published to cover Gas Transmission and Distribution Piping Systems. In 1955, after a review by B31 Executive and Sectional Committees, a decision was made to develop and publish other industry sections as separate code documents of the American Standard Code for Pressure Piping.

The first edition of Refrigeration Piping was published as ASA B31.5-1962, superseding Section 5 of B31.1-1955. This Section was revised in 1966. Following approval by the Sectional Committee and the sponsor, this revi- sion was approved by the United States of America Standards Institute on September 8, 1966, and desig- nated USAS B31.5-1966. Revision of this Section was approved on April 18, 1974 by the American National Standards Institute and designated ANSI B31.5-1974.

In December 1978, the American National Standards Committee B31 was reorganized as the ASME Code for Pressure Piping, B31 Committee under procedures developed by the American Society of Mechanical Engineers and accredited by the American National Standards Institute. The Code designation was also changed to ANSI/ASME B31.

Previous editions of this Code include those of 1983, 1987, 1989, 1992, 2001, 2006, and 2010. In this, the

2013 Edition, new additions and revisions have been made to the text, shown in the Summary of Changes page.

This Code was approved as an American National Standard on February 19, 2013.

v

ASME B31 COMMITTEE

Code for Pressure Piping

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

STANDARDS COMMITTEE OFFICERS

M. L. Nayyar, Chair

K. C. Bodenhamer, Vice Chair

N. Lobo, Secretary

STANDARDS COMMITTEE PERSONNEL

R. J. T. Appleby, ExxonMobil Development Co.

C. Becht IV, Becht Engineering Co.

A. E. Beyer, Fluor Enterprises

K. C. Bodenhamer, Enterprise Products Co.

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

C. J. Campbell, Air Liquide

J. S. Chin, TransCanada Pipeline U.S.

D. D. Christian, Victaulic

D. L. Coym, Intertek Moody

R. P. Deubler, Fronek Power Systems, LLC

1. Eskridge Jr., Jacobs Engineering

2. J. Fetzner, BP Exploration Alaska, Inc.

P. D. Flenner, Flenner Engineering Services

J. W. Frey, Stress Engineering Service, Inc.

D. R. Frikken, Becht Engineering Co.

R. A. Grichuk, Fluor Enterprises

R. W. Haupt, Pressure Piping Engineering Associates, Inc.

B. P. Holbrook, Babcock Power, Inc.

G. A. Jolly, Vogt Valves Flowserve Corp.

N. Lobo, The American Society of Mechanical Engineers

W. J. Mauro, American Electric Power

J. E. Meyer, Louis Perry & Associates, Inc.

T. Monday, Team Industries, Inc.

M. L. Nayyar, Bechtel Power Corp.

G. R. Petru, EPCO Inc.

E. H. Rinaca, Dominion Resources, Inc.

M. J. Rosenfeld, Kiefner/Applus — RID

S. K. Sinha, Lucius Pitkin, Inc.

W. J. Sperko, Sperko Engineering Services, Inc.

F. W. Tatar, FM Global

K. A. Vilminot, Black and Veatch

G. A. Antaki, Ex-Officio Member, Becht Engineering Co., Inc.

L. E. Hayden Jr., Ex-Officio Member, Consultant

A. J. Livingston, Ex-Officio Member, EI Paso Pipeline Group

R. A. Appleton, Contributing Member, Refrigeration Systems Co.

B31.5 REFRIGERATION PIPING SECTION COMMITTEE

R. A. Appleton, Chair, Refrigeration Systems, Co.

H. Kutz, Vice Chair, Johnson Controls Corp./York Process Systems

F. Huang, Secretary, The American Society of Mechanical Engineers

M. R. Braz, MRBraz & Associates, PLLC

G. S. Derosier, Evapco, Inc.

A. A. Kailasam, Baltimore Aircoil Co.

G. W. Prie, Johnson Controls

S. A. Walter, Vilter Manufacturing Corp.

D.