_STP_958-1987.pdf

On the cover:(Bottom)Entrance portal of the Experimental Mine at Bruceton,Pennsylvania.Research on the explosion hazards of coal dust andlnethane gas has been conducted at this Bureau of Mines facility continuously since 1910 and it is now a National Historical Site.(Second from bottom)Coal dust explosion propagating outward from the mine portal.This demonstration was conducted for the attendees of the Symposium on Industrial Dust Explosions in June 1986.(Second from top)Explosion propagation is essentially complete as the hot fireball of combustion products expands and begins to cool.(Top)Explosion fireball rises as a result of buoyancy forces and continues to cool.(Photographer:K.L.Cashdollar)Copyright by ASTM Intl(all rights reserved);Thu Dec 31 16:08:56 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.INDUSTRIAL DUST EXPLOSIONS Symposium on Industrial Dust Explosions sponsored by ASTM Committee E-27 on Hazard Potential of Chemicals Bureau of Mines,U.S.Department of tlie Interior RO National Fire Protection AssociationCommittee on NFRAT Explosion Protection Systems Pittsburgh,Pennsylvania,10-13 June 1986 ASTM SPECIAL TECHNICAL PUBLICATION 958 Kenneth L.Cashdollar,Bureau of Mines,and Martin Hertzberg,Bureau of Mines,editors ASTM Publication Code Number(PCN)04-958000-31 m 1916 Race Street,Philadelphia,PA 19103 Copyright by ASTM Intl(all rights reserved);Thu Dec 31 16:08:56 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Library of Congress Cataloging-in-Publication Data Symposium on Industrial Dust Explosions(1986:Pittsburgh,Pa.)Industrial dust explosions.(ASTM special technical publication;958)ASTM publication code number(PCN)04-958-000-31.Includes bibliographies and index.1.Dust explosionsCongresses.2.Dust control Congresses.I.Cashdollar,Kenneth L.II.Hertzberg,Martin.III.ASTM Committee E-27 on Hazard Potential of Chemicals.IV.United States.Bureau of Mines.V.National Fire Protection Association.Committee on Explosion Protection Systems.VI.Title.VII.Series.TH9446.D86S96 1986 604.7 87-27066 ISBN 0-8031-0957-1 Copyright by AMERICAN SOCIETY FOR TESTING AND MATERIALS 1987 Library of Congress Catalog Card Number:87-27066 NOTE The Society is not responsible,as a body,for the statements and opinions advanced in this publication.Printed in Ballimore,MD October 1987 Copyright by ASTM Intl(all rights reserved);Thu Dec 31 16:08:56 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Foreword The Symposium on Industrial Dust Explosions was held in Pittsburgh,Pennsylvania on 10-13 June 1986.ASTM Committee E-27 on Hazard Potential of Chemicals,the Bureau of Mines,and the National Fire Protection AssociationCommittee on Explosion Protection Systems were the sponsors.Kenneth L.CashdoUar and Martin Hertzberg,both with the Bureau of Mines,served as symposium chairman and co-chairman,respectively,and have edited this publication.Robert P.Benedetti,National Fire Protection Association,and Thomas F.Hoppe,Ciba-Geigy Corp.,were also symposium co-chairmen.Copyright by ASTM Intl(all rights reserved);Thu Dec 31 16:08:56 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Related ASTM Publication Fire Safety:Science and Engineering,STP 882(1985),04-882000-31 Copyright by ASTM Intl(all rights reserved);Thu Dec 31 16:08:56 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.A Note of Appreciation to Reviewers The quality of the papers that appear in this pubhcation reflects not only the obvious efforts of the authors but also the unheralded,though essential,work of the reviewers.On behalf of ASTM we acknowledge with appreciation their dedication to high professional standards and their sacrifice of time and effort.ASTM Committee on Publications Copyright by ASTM Intl(all rights reserved);Thu Dec 31 16:08:56 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.ASTM Editorial Staff Kathleen A.Peters Janet R.Schroeder Kathleen A.Greene Bill Benzing Copyright by ASTM Intl(all rights reserved);Thu Dec 31 16:08:56 EST 2015Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Contents Overview 1 Introduction to Dust ExplosionsMARTIN HERTZBERG AND KENNETH 5 L.CASHDOLLAR Influence of Temperature and Pressure on the Explosion Char-33 acteristics of Dust/Air and Dust/Air/Inert Gas Mixtures WERNER WIEMANN Thermal Autoignition Temperatures from the 1.2-L Furnace and 45 Their Use in Evaluating the Explosion Potenti