3284 NTERNATIONAL STANDARD (TSO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION-MEKIYHAPOAHAR OPIAHH3ALIMI IO CTAHIAPTM3ALIMM·ORGANISATION INTERNATIONALE DE NORMALISATION Continuous mechanical handling equipment for loose bulk materials - Dimensions of bends for use in pneumatic handling Engins de manutention continue pour produits en vrac - Dimensions des coudes pour la manutention pneumatique First edition -- 1974-12-15 ANsi Interrict D.: ct .DEC 1 6 1974 15U 3284-19/4 (E) UDC 621.867 Ref. No. 1SO 3284-1974 (E) Descriptors : handling equipment, continuous handling, bulk products, pneumatic equipment, pneumatic lines, pipe bends, dimensions Price based on 2 pages Copyright InternationalOrganizationfor Standardization from IHS Not for Resale FOREWORD IsO (the International Organization for Standardization) is a worldwide federation of national standards institutes (ISO Member Bodies). The work of developing International Standards is carried out through ISo Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set up has the right to be represented on that Committee. international organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the Technical Committees are circulated to the Member Bodies for approval before their acceptance as International Standards by the 1SO Council. Internationat Standard ISO 3284 was drawn up by Technical Committee ISO/Tc 101, Continuous mechanical handling equipment, and circulated to the Member Bodies in November 1973. It has been approved by the Member Bodies of the following countries : Australia Germany Spain Beigium India Sweden Bulgaria Ireland Thailand Czechoslovakia Italy Turkey Egypt, Arab Rep. of Netherlands United Kingdom Finland Poland U.S.S.R. France South Africa, Rep. of Yugoslavia No Member Body expressed disapprovai of the document. International Organization for Standardization, 1974 : Printed in Switzerland Copyright International Organization for Standardization Not for Resale without license from IHS INTERNATIONAL STANDARD ISO 3284-1974 (E) Continuous mechanical handling equipment for loose bulk materials - Dimensions of bends for use in pneumatic handling 1 SCOPE ANDFIELDOFAPPLICATION This International Standard specifies the dimensions of bends for use in pneumatic handling for loose bulk materials, in three series : light, moderate and heavy. 2 SYMBOLS D = Inside diameter R - Mean radius of curve D, = Outside diameter L = Length of straight sleeve 3 DIMENSIONS FOR LIGHT DUTY SERVICE Dimensions in millimetres Small curve1) Intermediate curve Large curve D D1 R R 66 70 160 500 76,1 175 72,1 500 1 500 84.9 88.9 207,5 500 96,4 101,6 235 750 102.8 108 252.5 750 109.1 114,3 270 750 2 000 127,2 133 311,5 750 133,9 139,7 330 750 153,2 159 375 1 000 2 000 162,5 168,3 390 1 000 2 000 187.9 193,7 455 1 000 2 000 211,9 219,1 515 1 250 2 500 236.5 244,5 580 1 250 2 500 1) These curves may be used in the moderate series. NOTE - The priority series are underlined. 1 Copyright International Organization for Standardization Not for Resale g permitted without license from IHS