ASME_B31-2-1968.pdf

Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.CODE FOR PRESSURE PIPING FUEL GAS PIPING USAS B3 1.2-1968 USAS B31.2-1968 was withdrawn as an American National Standard on February 18,1988.ASME will continue to make available USAS B31.2-1968 as a historical document for a period of time.SPONSORED AND PUBLISHED BY-T-HE AMERICAN SOCIETY OF MECHANICAL ENGINEERS United Engineering Center 345 East 47th Street New York,N.Y.10017 Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Library of Congress Catalog Card Number 72-76015 No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.Copyright Q,1968,by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS Printed U.S.A.ii Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Foreword T HE need for a national code for pressure piping became increasingly evident from 1915 co 1925.To meet this need,the American Engineering Standards Committee(lacer changed co American Standards Association and then co United Scares of America Standards Institute)initiated Project B31 in March,1926,at the request of the American Society of Mechanical Engineers and with char Society as the sole administrative sponsor.Because of the wide field involved,Standards Com-mittee B31 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 co keep the code abreast of current developments in piping design,welding,stress computations,new dimensional and material standards and specifications and increases in the severity of service conditions,revisions,supplements and new editions of the code have been published as follows:B31.1-1942 American Standard Code for Pressure Piping 1942 Procedure established for handling interpretation of code requirements B31.la-1944 Supplement 1 B31.lb-1947 Supplement 2 B31.1-1951 American Standard Code for Pressure Piping B3l.la-1953 Supplement 1 0831.1-1951 B31.1-1955 American Standard Code for Pressure Piping After a review by B31 Executive and Standards Commiccees in 1955,a decision was made to develop and publish industry sections as separate code documents of the USA Standard B31Code for Pressure Piping.Section 2 of B31.1-1955 was revised extensively(in title,scope,format and contents)and approved by USASI on December 12,1968 as USAS B31.2-1968,Fuel Gas Piping.111 Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Standards Committee 831 Code for Pressure Piping*OFFICERS E.C.Pandorf,Chairman J.A.Casnet,Vice Chainan P.L.Daley,Vice Chaiman R.V.Warrick,Secretary STANDARDS COMMITTEE AIR CONDITIONING AND REFRIGERATING INSTITUTE R.L.Jones,Carrier Air Conditioning Company,Syracuse,New York F.J.Reed,Alt.,Air Conditioning&Refrigerating Institute,Arlington,Virginia ALLOY CASTING INSTITUTE J.W.Juppenlatz,Quaker Alloy Casting Company,Myerstown,Pennsylvania E.A.Schaefer,Aft.,Alloy Casting Institute,New York,New York AMERICAN BOILER MANUFACTURERS ASSOCIATION B.1.Round,Combustion Engineering,Inc.,Windsor Connecticut AMERICAN BUREAU OF SHIPPING J.W.Heck,American Bureau of Shipping,New York,New York E.G.Baker,Alt.,American Bureau of Shipping,New York,New York AMERICAN GAS ASSOCIATION J.H.Carson,Con-Gas Service Corporation,Pittsburgh,Pennsylvania A.H.Cramer,Michigan Consolidated Gas Company,Detroit,Michigan J.H.Miller,Public Service Electric&Gas Company,Newark,New Jersey A.J.Shoup,Texas Eastern Transmission Corporation,Shreveport,Louisiana R.D.Smith,Pacific Gas&Electric Company,San Francisco,California AMERICAN INSTITUTE OF CHEMICAL ENGINEERS R.S.Roberts,E.I.DuPont De Nemours&Company,Inc.,Wilmington,Delaware AMERICAN INSTITUTE OF MINING,METALLURGICAL AND PETROLEUM ENGINEERS E.A.Jonas,Bethfehem Steel Company,Bethlehem,Pennsylvania H.S.Blumberg,New York,New York AMERICAN INSURANCE ASSOCIATION J.H.Beauchamp,American Fore Loyalty Group,New York,New York AMERICAN IRON AND STEEL INSTITUTE W.M.Neckerman Jr.,Tubular Products,Youngstown,Ohio P.L.Daley,United States Steel Corporation,Pittsburgh,Pennsylvania AMERICAN PETROLEUM INSTITUTE Division of Production J.W.Squire,Service Pipe Line Company,Tulsa,Oklahoma J.E.Ubben,Alt.,American Petroleum Institute,Dallas,Texas