ISO INTERNATIONAL STANDARD 6771 Third edition 2007-08-15 Aerospace Fluid systems and components Pressure and temperature classifications Aéronautique et espace - Systemes de fluides et éléments constitutifs - Classification des températures et des pressions Reference number ISO 6771:2007(E) @ISO2007 by IHS under lic ted without license from IHS Not for Resale ISO 6771:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The IsO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below COPYRIGHTPROTECTEDDOCUMENT @ISO2007 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's member body in the country of the requester. ISO copyright office Case postale 56. CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO 2007 - All rights reserved I without license from IHS Not for Resale ISO 6771:2007(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technical committees. Each member body interested in a subject for which a technical committee has been International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 6771 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 10, Aerospace fluid systems and components. This third edition cancels and replaces the second edition (IsO 6771:1987), which has been technically classeshavebeenrevised. ii ISO 6771:2007(E) Introduction class and temperature type. @ ISO 2007 - All rights reserved setworkingpemittedwithoutlicensefromHS Not for Resale INTERNATIONAL STANDARD ISO 6771:2007(E) Aerospace Fluid systems and components Pressure and temperature classifications 1 Scope This International Standard specifies the pressure classes and temperature types for the basic systems and or that are used in developmental systems 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 basicsystem temperature types and pressure classes of the aircraft fluid systems, usually specified in the aircraft specification, with which the vehicle is designed to be operated NOTE 1 The basic system consists of several subsystems. NOTE2 2.2 component system system whose temperature types and pressure classes are usually defined in the product specification NOTE 1 The components are tested and qualified individually under each subsystem. NOTE 2 The harmonization of temperature and pressure tolerances is accomplished in the component systems so that subsystem. 3 Classification 3.1 Basic system 3.1.1 G