ISO INTERNATIONAL STANDARD 18119 First edition 2018-05 Gas cylinders Seamless steel and seamless aluminium-alloy gas cylinders and tubes Periodic inspection and testing Bouteilles a gaz - Bouteilles et tubes a gaz en acier et en alliages d'aluminium, sans soudure - Controles et essais périodiques Reference number IS0 18119:2018(E) so @IS02018 IS0 18119:2018(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2018 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 of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2018 - All rights reserved IS0 18119:2018(E) Contents Page Foreword ..V Introduction. ...vi 1 Scope 2 Normative references 3 Terms and definitions 4 Abbreviated terms and symbols 5 Intervals between periodic inspections and tests ..3 6 List of procedures for periodic inspections and tests. 7 Identification of cylinder and preparation for inspection and tests ..4 8 Depressurization and de-valving procedures ..4 8.1 General 8.2 Cylinders requiring de-valving ..5 8.3 Cylinders not requiring de-valving ..5 8.4 Cylinders requiring shot blasting .5 9 External visual inspection .5 9.1 Preparation .5 9.2 Inspection procedure ..6 10 Inspection of cylinder neck .6 10.1 Cylinder-to-valve threads .6 10.2 Other neck surfaces.. .9 10.3 Damaged internal neck threads .9 10.4 Neckring and collar attachment .9 11 Check of internal condition ..9 11.1 General .9 11.2 Internal visual inspection .10 11.2.1 Preparation. .10 11.2.2 Inspection requirements. 10 11.2.3 Cylinders with footrings .11 11.2.4 Cylinders with internal coatings ..11 12 Supplementary tests .11 12.1 General. ..11 12.2 Additional test for seamless aluminium-alloy cylinders possibly subjected to heat damage. ..11 12.3 Hammer test on cylinders with footrings .12 13 Cylinder repairs. ..12 14 Pressure test or UT .12 14.1 General. ..12 14.2 Proof pressure test .13 14.2.1 General. .13 14.2.2 Test equipment. .13 14.2.3 Test criteria. ..13 14.2.4 Acceptance criteria. ..14 14.3 Hydraulic volumetric expansion test. ..14 14.4 UT .14 14.4.1 General. .14 14.4.2 Requirements ..14 14.4.3 Calibration .19 14.4.4 Performing the examination. .23 @ IS0 2018 - All rights reserved iii