International ISO Standard ISO 14617-2 Graphical symbols for diagrams - Second edition 2025-04 Part 2: Graphical symbols Symboles graphiques pour schémas Partie 2: Symboles graphiques Reference number ISO 14617-2:2025(en) @ ISO 2025 IS0 14617-2:2025(en) COPYRIGHT PROTECTED DOCUMENT @IS02025 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 ofthe requester. ISO copyright office CP 40i: Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland @ IS0 2025 - All rights reserved i IS0 14617-2:2025(en) Contents Foreword. Introduction XI 1 Scope. 2 Normative references .... 3 Terms and definitions... 4 4.1 Components, devices, functional units, equipment, plants and functions... 4.1.1 Basic symbols... 4.1.2 Supplementary symbols..... 4.1.3 Symbol examples .. 4 4.2 Variability. 4.2.1 Basic symbols.... 4.2.2 Supplementary symbols... 4.2.3 Symbol examples ... 4.3 Characteristics for force, motion, mass flow, magnetic flow and signals..... 4.3.1 Basic symbols.... 4.3.2 Supplementary symbols... 4.3.3 4.4 Directions... 4.4.1 Basic symbols.. 4.4.2 4.4.3 Symbol examples .. .10 4.5 Materials .. 12 4.5.1 Basic symbols.... 4.5.2 Supplementary symbols.... .12 4.5.3 Symbol examples... 12 4.6 Simplifications.. 4.6.1 Basic symbols... .13 4.6.2 Supplementary symbols... 13 4.6.3 Symbol examples.... 4.7 .14 4.7.1 Basic symbols.. .14 4.7.2 Supplementary symbols... 4.7.3 5 Connections and related devices (fluids).... ..15 5.1 5.1.1 Basic symbols... .15 5.1.2 Supplementary symbols... ..16 5.1.3 5.2 Connection functional joints.... .19 5.2.1 Basic symbols... .19 5.2.2 Supplementary symbols... 5.2.3 Symbol examples .. .19 5.3 Connection devices .20 5.3.1 Basic symbols... 5.3.2 Supplementary symbols.... 22 5.3.3 Symbol examples... .22 5.4 Connection, simplifications..... @ IS0 2025 - All rights reserved ii IS0 14617-2:2025(E) 5.4.1 Basic symbols .... 5.4.2 Supplementary symbols .. ..23 5.4.3 .Symbol example... 5.5 Couplings., quick release couplings.. 5.5.1 Basic symbols .. 23 5.5.2 5.5.3 Symbol examples... 5.6 Pipeline and duct elements ... 5.6.1 Basic. symbols .. 5.6.2 Supplementary symbols... 5.6.3 Symbol examples... 5.7 Access chambers, inspection wells.... 5.7.1 5.7.2 Supplementary symbols ...29 5.7.3 Symbol examples.. 6 Fluid flow control.. ..29 6.1 General purpose valves. 6.1.1 6.1.2 Supplementary symbols... .30 6.1.3 Symbol examples... .32 6.2 6.2.1 Basic symbols ..... .37 6.2.2 Supplementary symbols... 6.2.3 6.3 Valves with special functions.. .38 6.3.1 Basic symbols .... .38 6.3.2 6.3.3 Symbol examples.... 6.4 Taps, showers, etc. .39 6.4.1 Basic symbols .. 6.4.2 Supplementary symbols .. .40 6.4.3 Symbol examples... 6.5 6.5.1 6.5.2 Supplementary symbols ... ..40 6.5.3 6.6 6.6.1 Basic symbols .. .41 6.6.2 Supplementary symbols.... ..41 6.6.3 7 Actuators. 7.1 Basic element... 7.1.1 Basic symbols ... 7.1.2 Supplementary symbols .. .43 7.1.3 7.2 Manually operated actuators... ..44 7.2.1 Basic symbols ... .44 7.2.2 Supplementary symbols 7.2.3 Symbol examples... ..46 7.3 Automatic actuators. ...46 7.3.1 7.3.2 Supplementary symbols .... ..48 7.3.3 Symbol examples. ...48 @ IS0 2025 - All rights reserved iv IS0 14617-2:2025(en) 7.4 Complex actuators.. .48 7.4.1 Basic symbols.... 7.4.2 Supplementary symbols.... .49 7.4.3 Symbol examples .. .49 8 Fluid transport... 8.1 Pumps, compressors and fan.. .50 8.1.1 Basic symbols.... .50 8.1.2 Supplementary symbols.... 8.1.3 Symbol examples .. .53 9 Fluid energy transfer.. .54 9.1 Heat exchangers, condensers. .54 9.1.1 Basic symbols... .54 9.1.2 9.1.3 Symbol examples... .