《ISO-6605-2002.pdf》由会员分享，可在线阅读，更多相关《ISO-6605-2002.pdf（18页珍藏版）》请在三一文库上搜索。
1、INTERNATIONAL STANDARD ISO 6605 Second edition 2002-11-01 Reference number ISO 6605:2002(E) ISO 2002 Hydraulic fluid power Hoses and hose assemblies Test methods Transmissions hydrauliques Tuyaux et ensembles flexibles Mthodes dessai ISO 6605:2002(E) ii ISO 2002 All rights reserved PDF disclaimer Th
2、is PDF file may contain embedded typefaces. In accordance with Adobes 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 th
3、erein the responsibility of not infringing Adobes 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;
4、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. ISO 2002 All rights res
5、erved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the reque
6、ster. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland -,-,- ISO 6605:2002(E) ISO 2002 All rights reserved iii Contents Page 1Scope . 1 2Normative references . 1 3Terms and definitions 1 4
7、Visual examination of product 1 5Standard tests 2 5.1Dimensional check test 2 5.2Proof test . 2 5.3Change-in-length test 2 5.4Burst test . 3 5.5Cold bend test . 3 5.6Cyclic endurance (impulse) test 4 5.7Leakage test 7 5.8Abrasion resistance test 7 5.9Adhesion test . 9 6Criteria for acceptance . 10 7
8、Identification statement (Reference to this International Standard) 10 Bibliography. 11 ISO 6605:2002(E) iv ISO 2002 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing
9、 International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liais
10、on with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International
11、 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. Attention is drawn to the possibility that some of the elements of this International Standa
12、rd may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 6605 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 4, Connectors and similar products and components. This second
13、 edition cancels and replaces the first edition (ISO 6605:1986), which has been technically revised. ISO 6605:2002(E) ISO 2002 All rights reserved v Introduction In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit. A hose a
14、ssembly is a flexible fluid power conductor consisting of a length of hose attached, at both ends, to hose fittings. INTERNATIONAL STANDARDISO 6605:2002(E) ISO 2002 All rights reserved 1 Hydraulic fluid power Hoses and hose assemblies Test methods 1Scope This International Standard specifies uniform
15、 test methods for evaluating the performance of hoses and hose assemblies (hoses and attached hose fittings) used in hydraulic fluid power systems. Specific tests and performance criteria for evaluating hoses and hose assemblies used in hydraulic applications are in accordance with the requirements
16、of the respective product (hoses or hose fitting) specifications. 2Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, a
17、ny of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative docume
18、nt referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 471, Rubber Temperatures, humidities and times for conditioning and testing ISO 1402, Rubber and plastics hoses and hose assemblies Hydrostatic testing ISO 3448, Industrial liquid lubric
19、ants ISO viscosity classification ISO 4671:1999, Rubber and plastics hoses and hose assemblies Methods of measurement of dimensions ISO 4957, Tool steels ISO 5598, Fluid power systems and components Vocabulary ISO 5893, Rubber and plastics test equipment Tensile, flexural and compression types (cons
20、tant rate of traverse) Specification ISO 6133, Rubber and plastics Analysis of multi-peak traces obtained in determinations of tear strength and adhesion strength 3Terms and definitions For the purposes of this International Standard, the terms and definitions given in ISO 5598 apply. 4Visual examin
21、ation of product Hose assemblies shall be visually inspected to determine that the correct hose fittings are properly installed. -,-,- ISO 6605:2002(E) 2 ISO 2002 All rights reserved 5Standard tests 5.1Dimensional check test 5.1.1General NOTEThese test methods are technically equivalent to those spe
22、cified in ISO 4671. The hoses shall be inspected for conformity with all the dimensions of the relevant hose specification. 5.1.2Measurement of outside and reinforcement diameters 5.1.2.1Determine finished outside diameter and reinforcement diameter, where required, by calculation from measurement o
23、f the respective circumference. As an alternative, a flexible graduated tape may be used to read the diameters directly. 5.1.2.2Take outside diameter measurements at a minimum of from the hose ends. 5.1.3Measurement of inside diameter 5.1.3.1Measure the inside diameter by means of a suitable expandi
24、ng ball or telescoping gauge in accordance with method 2 given in ISO 4671:1999. 5.1.3.2Take inside diameter measurements at a minimum of from the hose ends. 5.1.4Measurement of concentricity 5.1.4.1Measure concentricity over both the reinforcement and the finished outside diameters using either a d
25、ial indicator gauge or a micrometer. 5.1.4.2Take concentricity measurements at a minimum of from the hose ends. 5.1.4.3Round the foot of the measuring instrument to conform to the inside diameter of the hose. 5.1.4.4Take readings at () intervals around the hose. Acceptability is based on the total v
26、ariation between the highest and lowest readings. 5.2Proof test 5.2.1Test the hose assemblies hydrostatically to the specified proof pressure in accordance with the relevant product specification using the method specified in ISO 1402, for a period of between and for all sizes. 5.2.2Hose assemblies
27、that exhibit no leakage or other evidence of failure after being subjected to the proof test shall be deemed to have passed the test. 5.3Change-in-length test 5.3.1Conduct measurements for the determination of elongation or contraction on a previously unused, unaged hose assembly having a free lengt
28、h between hose fittings of at least . 5.3.2Attach the hose assembly to the pressure source in an unrestricted straight position. If the hose is not straight due to its natural curvature, it may be fastened laterally to achieve a straight position. Pressurize to the operating pressure for a period of
29、 , then release the pressure. 25 mm 25 mm 15 mm 901,57 rad 30 s60 s 600 mm 30 s -,-,- ISO 6605:2002(E) ISO 2002 All rights reserved 3 5.3.3Place accurate reference marks ( ) apart on the outer cover of the hose, midway between hose fittings, after allowing the hose assembly to restabilize for a peri
30、od of following pressure release. 5.3.4Repressurize the hose assembly to the specified operating pressure for a period of . 5.3.5Measure the distance between reference marks while the hose is pressurized and record this as . 5.3.6Determine the change in length using the following formula in accordan
31、ce with ISO 1402: where is the distance between the reference marks after the hose assembly restabilizes pressurized following the initial pressurization and release of pressure, in millimetres; is the distance between the reference marks while the hose assembly is under pressure, in millimetres; is
32、 the percentage change in length, which will be positive () in the case of an increase in length and negative () in the case of a decrease in length. 5.4Burst test 5.4.1General This is a destructive test. Hose assemblies that have been subjected to this test should be destroyed. 5.4.2Procedure 5.4.2
33、.1Subject hose assemblies on which the hose fittings have been attached for less than 30 days to a hydrostatic pressure, increased at a constant rate in accordance with ISO 1402. 5.4.2.2Reject hose assemblies showing leakage, hose burst or indication of failure below the specified minimum burst pres
34、sure. 5.5Cold bend test 5.5.1General NOTEThis test is technically identical to method B in ISO 4672:1997. This is a destructive test. Hose assemblies that have been subjected to this test should be destroyed. 5.5.2Procedure 5.5.2.1Condition hose assemblies at a temperature equal to the minimum appli
35、cation temperature of the relevant product specification in a straight position for . 5.5.2.2While still at the minimum application temperature, bend the samples once, taking a time of between and , over a mandrel having a diameter equal to twice the specified minimum bend radius. In the case of hos
36、e sizes up to and including nominal inside diameter, bend them through over the mandrel; in the case of hose sizes larger than nominal inside diameter, bend them through over the mandrel. 500 mml0 30 s 30 s l1 l = l1 l0 l0 100 l0 l1 l+ 24 h 8 s 12 s 22 mm180 22 mm90 ISO 6605:2002(E) 4 ISO 2002 All r
37、ights reserved 5.5.2.3After bending, allow the sample to warm to room temperature, visually examine it for cover cracks and subject it to the proof test (see 5.2). 5.5.2.4Hose assemblies that exhibit no visible cracks, leakage or other evidence of failure after the cold bend test shall be deemed to
38、have passed the test. 5.6Cyclic endurance (impulse) test 5.6.1General NOTEThis test method is technically equivalent to that specified in ISO 6803. This is a destructive test. Hose assemblies that have been subjected to this test should be destroyed. 5.6.2Procedure 5.6.2.1Test hose assemblies with h
39、ose fittings that have been attached for less than 30 days. 5.6.2.2Calculate the free (exposed) length of hose under test, as shown in Figure 1, using the appropriate formula for the inside diameter of the hose under test, as follows: a)hose sizes up to and including nominal inside diameter: bend fr
40、ee length b)hose sizes larger than nominal inside diameter: bend free length where is the minimum bend radius; is the hose outside diameter. 5.6.2.3Connect the test hose assemblies to the apparatus. These shall be installed according to Figure 1. The hose assemblies of nominal inside diameter up to
41、and including shall be bent through , and hose assemblies of nominal inside diameter larger than shall be bent through . a)Hose sizes up to and including nominal inside diameter b)Hose sizes larger than nominal inside diameter Figure 1 Hose assemblies for cyclic endurance (impulse) test 22 mm 180= (
42、r + d/2) +2d 22 mm 90= /2(r + d/2) +2d r d 22 mm180 22 mm90 22 mm22 mm -,-,- ISO 6605:2002(E) ISO 2002 All rights reserved 5 5.6.2.4Select a test fluid that meets with the requirements of viscosity grade ISO VG 46 ( at ) in accordance with ISO 3448, and circulate it at a rate sufficient to maintain
43、a uniform fluid temperature within the hose assemblies. 5.6.2.5Apply a pulsating pressure internally to the hose assemblies at a rate between and ; record the frequency used. 5.6.2.6The pressure cycle shall fall within the shaded area of Figure 2 and conform as closely as possible to the curve as sh
44、own, and the actual rate of pressure rise shall be determined as shown in Figure 2 and shall be within a tolerance of of the calculated nominal value. 5.6.2.7Test the hose assemblies at the impulse test pressure and temperature indicated in the relevant product specification. 5.6.2.8Determine the du
45、ration of the impulse test in total number of impulse cycles by the relevant product specification. 5.6.2.9Hose assemblies that exhibit no evidence of failure at the completion of the required number of impulse cycles shall be deemed to have passed the test. 46 cSt4,6 cSt40 C 0,5 Hz1,3 Hz 10 % -,-,-
46、 ISO 6605:2002(E) 6 ISO 2002 All rights reserved NOTE 1Secant pressure rise is the straight line drawn through two points on the pressure rise curve; one point at of the test pressure and the other at of the test pressure. NOTE 2Point “0” is the intersection of the secant pressure rise with a pressu
47、re of (). NOTE 3Pressure rise rate is the slope of the secant pressure rise expressed in megapascals per second (). NOTE 4Cycle rate shall be uniform at to . NOTE 5The nominal rate of pressure rise shall be equal to: where is the rate of pressure rise in megapascals per second (); is the frequency i
48、n hertz (); is the nominal impulse test pressure in megapascals (); is equivalent to 5 megapascals (). a Secant pressure rise rate b Rate of pressure rise to be determined between these two points. c to of a complete impulse cycle d One complete impulse cycle Figure 2 Cyclic endurance (impulse) test pressure cycle 15 % 85 % 0 MPa 0 bar MPa/s 0,5 Hz1,3 Hz R = f (10p k) RMPa/s fHz pMPa kMPa 45 %55 % ISO 6605:2002(E) ISO 2002 All rights reserved 7 5.7Leakage test 5.7.1General This is a destructive test. Hose assemblies that have been subjected to this test should