ISO INTERNATIONAL STANDARD 19631 First edition 2015-09-01 Aerospace series Tube fittings for fluid systems, 5 080 psi (35 000 kPa) Qualification specification Série aérospatiale- Raccordements de tubes pour les systemes fluides, 5 080 psi (35 000 kPa) —Spécification de qualification Reference number ISO 19631:2015(E) ISO International Organization for Standardization @ IS0 2015 dardization 5956617 vided by IHS under ted without license from IHS IS0 19631:2015(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2015, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form 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 copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org Intenatinair PrganizationforStandardization etworking permitted without license from IHS IS0 19631:2015(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Requirements 3.1 Qualification .1 3.1.1 Manufacturer qualification 3.1.2 Product qualification. 2 3.2 Materials. 2 3.2.1 Fittings 2 3.2.2 Tubing 2 3.2.3 Testfluid 2 3.3 Environmental conditions 3 3.3.1 Pressures... 3 3.3.2 Temperature 3 3.4 Design and manufacture .3 3.4.1 Fluid passages. 3 3.5 Performance .3 3.5.1 Specimen preparation 3 3.5.2 Proof pressure. ..4 3.5.3 Gaseous pressure. 4 3.5.4 Hydraulic impulse resistance .4 3.5.5 Uitimate pressure. 5 3.5.6 Flexure fatigue resistance 5 3.5.7 Re-use capability. .5 3.5.8 Tensile load capability .6 3.5.9 Thermal shock .6 3.5.10 Over-tightening .6 3.5.11 Electrical conductivity .6 3.5.12 Salt spray .7 3.5.13 Vibration 3.5.14 Firetest .11 3.5.15 System pressure test .11 3.5.16 Fuel ageing .12 3.5.17 Hydraulic fluid ageing .12 3.5.18 Tube twisting.. ..12 3.5.19 Fitting/tube rotation torque. ..13 3.5.20 Stress corrosion. ..14 3.5.21 Lightning strike ..16 Annex A (normative) Equivalent materials and processes ..18 Bibliography .20 iii see=Zhejiang Institute of Standardization 5956617 ed withoutlicensefrom IHS