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1、TECHNICAL REPORT IS0 TR 11340 First edition 1994-07-01 Rubber and rubber products - Hydraulic hose assemblies - External leakage classification for hydraulic systems Caoutchouc et produits en caourchouc - Flexibles hydrauliques - Classification des fuites externes des installations hydrauliques Refe
2、rence number ISOiTR 11340: 1994(E) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 21:02:43 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/TR 11340
3、:1994(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for
4、which a technical committee has been established has the right to be re- presented on that committee. International organizations, governmental and nongovernmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on a
5、ll matters of electrotechnical standardization. The main task of technical committees is to prepare International Stan- dards, but in exceptional circumstances a technical committee may pro- pose the publication of a Technical Report of one of the following types: - type 1, when the required support
6、 cannot be obtained for the publica- tion of an International Standard, despite repeated efforts; - type 2, when the subject is still under technical development or where for any other reason there is the future but not immediate possibility of an agreement on an International Standard; - type 3, wh
7、en a technical committee has collected data of a different kind from that which is normally published as an International Standard (“state of the art”, for example). Technical Reports of types 1 and 2 are subject to review within three years of publication, to decide whether they can be transformed
8、into Interna- tional Standards. Technical Reports of type 3 do not necessarily have to be reviewed until the data they provide are considered to be no longer valid or useful. lSO/TR 11340, which is a Technical Report of type 3, was prepared by Technical Committee ISO/TC 45, Rubber and rubber product
9、s, Subcom- mittee SC 1, Hoses (rubber and plastics). The reasons why this document has been published as a type 3 Technical Report are given in the introduction. 0 IS0 19% All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any
10、 means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case Postale 56 l CH-1211 Geneve 20 l Switzerland Printed in Switzerland ii Copyright International Organization for Standardizatio
11、n Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 21:02:43 MDTNo reproduction or networking permitted without license from IHS -,-,- Q IS0 ISO/TR 11340:1994(E) Introduction The subject of an external leakage classification for hydrauli
12、c hoses was approved as a new work item in lSO/TC 45/SC 1 “Rubber and rubber products - Hoses (rubber and plastics)” in September 1990. Earlier, at its 1989 meeting, WG 3 “Hydraulic hoses” of lSO/TC 45/SC 1 had indicated that such work did not, of itself, form the basis of a standard, but would act
13、as useful guidance if published as a Type 3 Technical Report. A committee draft was issued for study and ballot in lSO/TC 45/SC 1 in March 1991. This received 14 votes of approval with no disapproval votes. Comments were discussed at the 1991 meeting of lSO/TC 45/SC l/WG 3, where it was agreed that
14、a text with minor modi- fications should be issued for ballot for approval to publish as a Technical Report. (Resolution 2212, document 45 N 5968.) The draft Technical Report was issued for ballot in lSO/TC 45/SC 1 in July 1992. It received 17 votes of approval with no disapproval votes and at the 1
15、992 meeting of ISO/TC 45/SC l/WG 3 it was agreed that it should be published as a Technical Report. (Resolution 2286-7, document 45 N 6027.) . . . III Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not fo
16、r Resale, 04/27/2007 21:02:43 MDTNo reproduction or networking permitted without license from IHS -,-,- TECHNICAL REPORT 0 IS0 ISO/TR 11340:1994(E) Rubber and rubber products - Hydraulic hose assemblies - External leakage classification for hydraulic systems 1 Scope This Technical Report establishes
17、 a uniform guide for defining the degree of external leakage on a hydraulic system. The choice of classification is intended to be by visual means rather than with the aid of instru- ments. It describes the leakage state at the observed time, considering that the state may change over a period of ti
18、me. 2 Classification The classification is given in table 1 and illustrated in figure 1. Table 1 - Leakage classification Class Description 0 No indication of moisture 1 Non-recurring fluid 2 Recurring fluid that does not result in the for- mation of a droplet 3 Recurring fluid that results in the f
19、ormation of a non-falling droplet 4 Recurring fluid where a droplet forms and falls 5 Recurring fluid where the frequency of drop- lets makes a measurable stream 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972
20、545001 Not for Resale, 04/27/2007 21:02:43 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/TR 11340:1994(E) Q IS0 Class 0 Class 1 Class 2 Class 3 Class G Class 5 Figure 1 - Leakage classification 2 Copyright International Organization for Standardization Provided by IHS
21、 under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 21:02:43 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/TR 11340:1994(E) Q IS0 ICS 23.100.30; 83.140.00 Descriptors: rubber products, hoses, hydraulic systems, rubber hose
22、s, leaktightness, classification. Price based on 2 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 21:02:43 MDTNo reproduction or networking permitted without license from IHS -,-,-