ISO INTERNATIONAL STANDARD 19880-1 First edition 2020-03 Gaseous hydrogen Fuelling stations - Part 1: General requirements Carburant d'hydrogene gazeux - Stations-service - Partie 1: Exigences générales Reference number ISO 19880-1:2020(E) ISO @IS02020 IS0 19880-1:2020(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2020 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 memberbody in the country oftherequester ISO copyright office CP 401 Ch. de Blandonnet 8 CH-1214 Vernier,Geneva Phone: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland i @ IS0 2020 - All rights reserved IS0 19880-1:2020(E) Contents Page Foreword ..vii 1 Scope 2 Normative references ..3 3 Terms and definitions 4 Abbreviated terms ..15 5 Risk management .16 5.1 Hydrogen fuelling station safety recommendations .16 5.2 Risk assessment .17 5.3 Mitigation measures to improve system safety .17 5.3.1 General. 5.3.2 Mitigations which reduce the potential for the formation of a flammable mixture ..17 5.3.3 Mitigation for the formation of a flammable mixture in enclosures ..18 5.3.4 Mitigation for the formation of a flammable mixture under a canopy. ..18 5.3.5 Mitigations which reduce the potential for ignition. .19 5.3.6 Mitigation of the escalation and/or impact of a fire or explosion originating from the fuelling installation ..20 5.3.7 Mitigation of the effect of an external fire/events on the fuelling station installation 5.3.8 Mitigation of risk to the high pressure hydrogen storage system of the vehicle being fuelled.. .23 5.4 Safety distances. 23 5.4.1 General 23 5.4.2 Safety distances relating to hydrogen vent stack outlets 24 5.5 Protection measures for non-hydrogen hazards.. .24 5.5.1 General. 24 5.5.2 Protection measures for asphyxiation hazard in an enclosure (confined space).24 5.5.3 Protection measures for emergency egress from enclosed spaces. 25 5.5.4 Ingressprotectionmeasures 25 5.5.5 Protection measures for hose whip 25 5.5.6 Protection measures for noise. 26 5.5.7 Protection against exposure to extremely cold or hot temperatures. 26 6 Hydrogen supply safety and operation .26 6.1 On site generation .26 6.1.1 Hydrogen generators using water electrolysis .26 6.1.2 Hydrogen generators using fuel processing technologies .26 6.2 Hydrogen delivery .27 6.2.1 Gaseous hydrogen supply by tube trailers and multiple element gas containers (MEGC) 27 6.2.2 Liquid hydrogen supply by tanker 28 6.3 Pipeline. 31 7 Equipment and Components .32 7.1 Generalrecommendations 32 Z.1.1 Hydrogen materials. 32 Z.1.2 Material hydrogen compatibility 32 7.1.3 Other material recommendations 33 7.2 Piping carrying hydrogen. 33 7.2.1 General 33 Z.2.2 Pipe fittings, valves, hoses, for gaseous hydrogen.. 33 7.3 Hydrogen storage recommendations. 34 7.3.1 General. 34 Z.3.2 Gaseous hydrogen storage vessels 34 @ IS0 2020 - All rights reserved ii IS0 19880-1:2020(E) Z.3.3 Gaseous hydrogen storage siting recommendations. .34 7.4 Hazardous areas (with potentially flammable mixtures) 36 7.4.1 General. 36 7.4.2 Equipment in hazardous areas. 37 7.5 Hydrogen compressors. .37 7.5.1 General. 37 7.5.2 Vibration and movement 38 7.5.3 Control and monitoring 38 7.6 Instruments for gaseous hydrogen systems. 39 7.7 Filters for gaseous hydrogen. .39 7.8 Gaseous hydrogen vent systems 40 7.8.1 General. 40 7.8.2 Vent outlet 40 7.8.3 Vent sizing. 41 7.8.4 Multiple relief devices. 42 7.9 Pneumatics and hydraulics 42 Z.10 Hydrogen purifier 43 Z.11 Enclosures and buildings containing hydrogen equipment 43 Z.11.1 General design. 43 Z.11.2 Maintenance access and possible occupancy. 43 Z.11.3 Ventilation of enclosures and buil