ISO INTERNATIONAL STANDARD 15171-1 First edition 1999-07-01 Connections for fluid power and general use Hydraulic couplings for diagnostic purposes Part 1: Coupling not for connection under pressure Raccordements pour transmissions hydrauliques et pneumatiques et usage general-Raccordshydrauliquespourdiagnostics- Partie 1: Raccord pour connexion n'étant pas sous pression ISO Reference number ISO 15171-1:1999(E) ISO 15171-1:1999(E) Foreword committees. Each member body interested in a subject for which a technical committee has been established has liaison with IsO, also take part in the work. sO collaborates closely with the International Electrotechnical Commission(lEC)onallmattersofelectrotechnicalstandardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 3. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 15171-1 was prepared by Technical Committee ISO/TC 131, Fluid power systems, SubcommitteeSC4,Connectorsandsimilarproductsandcomponents. IsO 15171 consists of the following parts, under the general title Connections for fluid power and general use Hydraulic couplings fordiagnostic purposes: Part1:Couplingnotforconnectionunderpressure Part 2: Coupling with M16 × 2 end for connection under pressure @ISO1999 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic International OrganizationforStandardization Case postale 56. CH-1211 Geneve 20 . Switzerland Internet [email protected] Printed in Switzerland ii ISO ISO 15171-1:1999(E) Introduction enclosed circuit. In general applications, a fluid may be conveyed under pressure. installed to aid in the diagnosis of hydraulic systems.