ISO INTERNATIONAL STANDARD 14084-2 Firstedition 2015-04-01 Process diagrams for power plants - Part 2: Graphical symbols Schemas deprocedés pour centrales électriques- Partie2:Symbolesgraphiques Reference number ISO14084-2:2015(E) ISO Intermational Organization for Standardization @IS02015 ted without license from IHS IS014084-2:2015(E) COPYRIGHTPROTECTEDDOCUMENT @ ISO 2015 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISOcopyrightoffice Case postale 56.CH-1211 Geneva 20 Tel. +4122 749 0111 Fax +41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland PrganizationforStandardization networking permited without license from IHS NotforResale, 2015/6/2908:41:07 IS0 14084-2:2015(E) Contents Page Foreword ..vi Introduction.. ..vii 1 Scope.. 2 Normative references 3 Terms and definitions ..1 4 Graphical symbols 4.1 General. .1 4.2 Size of graphical symbols. .1 4.3 Creation of new symbol examples .2 4.4 Symbols for large/complex objects .2 5 Structuring and representation .2 5.1 Overall structure. .2 5.2 Registration numbers .2 5.3 Representation of graphical symbols in the standard 3 5.4 Legendtotablerepresentation .3 6 Connections andrelated devices ..4 6.1 Fluid connections. 4 6.1.1 Functional connections .4 6.1.2 Connections with indication of process media 4 6.1.3 Simplifiedrepresentation .5 6.1.4 Symbols for direction, branching, crossing, etc. .5 6.1.5 Pipeline joints, couplings, etc. .6 6.1.6 Accessoriesforconnections 6.1.7 Pipeline components. 7 6.1.8 Pipeline insulation, tracing,etc. 6.2 Mechanical connections. .9 7 Fluid flow control. .9 7.1 Valves. .9 7.1.1 On-offvalves .9 7.1.2 Non-return valves .10 7.1.3 Control valves ..11 7.1.4 Safety and relief valves ..12 7.1.5 Special valves .13 7.1.6 Supplementary valve symbols .13 7.1.7 Specificvalvefeatures ..14 7.2 Dampers .14 7.2.1 On-off dampers ..14 7.2.2 Non-return dampers. .15 7.2.3 Control dampers ..15 7.2.4 Safety dampers. ..16 7.3 Safety devices other than valves ..16 8 Actuators ..16 8.1 Manual actuators. .16 8.2 Mechanical actuators. .16 8.3 Automatic actuators. ..17 8.4 Supplementary symbols ..17 9 Fluid transport .18 9.1 Pumps ..18 9.2 Fans, ventilators, blowers, compressors, etc. .19 9.3 Vacuum pumps, et.. .20 iii Licensee=Zhejiang Institute of Standardization 5956617 thout license from IHS Not for Resale, 2015/6/29 08:41:07