1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-23833-9 SANS 23297:2009Edition 1ISO 23297:2008Edition 1SOUTH AFRICAN NATIONAL STANDARD Thermoplastics hoses and hose assemblies Wire or sy
4、nthetic yarn reinforced single-pressure types for hydraulic applications Specification This national standard is the identical implementation of ISO 23297:2008 and is adopted with the permission of the International Organization for Standardization. Published by SABS Standards Division 1 Dr Lategan
5、Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 23297:2009 Edition 1 ISO 23297:2008 Edition 1 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS TC 45, Rubber an
6、d rubber products, in accordance with the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in December 2009. Reference numberISO 23297:2008(E)ISO 2008INTERNATIONAL STANDARD ISO23297First edition2008-12-15Thermoplastics hoses and hose asse
7、mblies Wire or synthetic yarn reinforced single-pressure types for hydraulic applications Specification Tuyaux et flexibles en matire thermoplastique Types hydrauliques pression unique, avec armature de fils mtalliques ou synthtiques Spcifications SANS 23297:2009This s tandard may only be used and p
8、rinted by approved subscription and freemailing clients of the SABS .ISO 23297:2008(E) PDF disclaimer This 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 licen
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11、o it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopy
12、ing and microfilm, without permission in writing from either ISO at the address below or ISOs 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 copyrightiso.org Web www.iso.org Published in Switzerl
13、and ii ISO 2008 All rights reservedSANS 23297:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 23297:2008(E) ISO 2008 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope 1 2 Normative references1 3 Terms and definit
14、ions .2 4 Classification .2 4.1 Classes .2 4.2 Types 2 4.3 Grades 2 5 Materials and construction.3 5.1 Hoses 3 5.2 Hose assemblies3 6 Dimensions and tolerances3 6.1 Diameters .3 6.2 Outer cover thickness.5 6.3 Concentricity5 7 Physical properties .6 7.1 Fluid and UV resistance of thermoplastic compo
15、unds .6 7.2 Performance requirements.6 8 Frequency of testing .9 9 Marking.9 9.1 Hoses 9 9.2 Hose assemblies9 10 Recommendations for packaging and storage 10 11 Test report10 Annex A (normative) Type tests and routine tests11 Annex B (informative) Production acceptance tests.12 Annex C (informative)
16、 Recommendations for lengths of supplied hoses and hose assemblies.13 Bibliography14 SANS 23297:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 23297:2008(E) iv ISO 2008 All rights reservedForeword ISO (the International Organization
17、for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing 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 t
18、he right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Interna
19、tional Standards are drafted in accordance with the rules given in the ISO/IEC 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. Publicatio
20、n 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 document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights
21、. ISO 23297 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 1, Hoses (rubber and plastics). SANS 23297:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 23297:2008(E) ISO 2008 All rights reserv
22、ed vIntroduction Based on the information received from plastics experts from the Netherlands and the UK, it was decided to exclude, for the time being, the abrasion resistance tests for compounds and hose cover from this International Standard. However, the manufacturers of this product recognize t
23、he need for determining the abrasion resistance of the hose cover, as the users require it. ISO 6945 is being revised to include a special test for this property and an amendment to 7.2, setting standards of acceptability for performance of hoses, is planned. SANS 23297:2009This s tandard may only b
24、e used and printed by approved subscription and freemailing clients of the SABS .SANS 23297:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .INTERNATIONAL STANDARD ISO 23297:2008(E) ISO 2008 All rights reserved 1Thermoplastics hoses and ho
25、se assemblies Wire or synthetic yarn reinforced single-pressure types for hydraulic applications Specification 1 Scope This International Standard specifies requirements for eight classes and two types (construction with adhesive bond between layers and construction without adhesive bond between lay
26、ers) of wire or synthetic yarn reinforced hydraulic hoses and hose assemblies of nominal size from 3,2 to 31,5. Each class has a single maximum working pressure for all sizes. Such hoses are suitable for use with hydraulic fluids HH, HL, HM, HR, and HV as defined in ISO 6743-4 at temperatures rangin
27、g from 40 C to +100 C for grades A and B and 40 C to +120 C for grades C and D. This International Standard does not include requirements for end fittings. It is limited to the performance of hoses and hose assemblies. The hose assembly maximum working pressure is governed by the lowest maximum work
28、ing pressure of the components. NOTE It is the responsibility of the user, in consultation with the hose manufacturer, to establish compatibility of the hose with the fluid to be used. 2 Normative references The following referenced documents are indispensable for the application of this document. F
29、or dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1402, Rubber and plastics hoses and hose assemblies Hydrostatic testing ISO 1746, Rubber or plastics hoses and tubing Bending test ISO 18
30、17, Rubber, vulcanized Determination of the effect of liquids ISO 4671, Rubber and plastics hoses and hose assemblies Methods of measurement of the dimensions of hoses and the lengths of hose assemblies ISO 4672:1997, Rubber and plastics hoses Sub-ambient temperature flexibility tests ISO 4892 (all
31、parts), Plastics Methods of exposure to laboratory light sources ISO 6803, Rubber or plastics hoses and hose assemblies Hydraulic-pressure impulse test without flexing ISO 7233, Rubber and plastics hoses and hose assemblies Determination of resistance to vacuum ISO 7326:2006, Rubber and plastics hos
32、es Assessment of ozone resistance under static conditions ISO 8033, Rubber and plastics hoses Determination of adhesion between components ISO 8330, Rubber and plastics hoses and hose assemblies Vocabulary ISO 8331, Rubber and plastics hoses and hose assemblies Guidelines for selection, storage, use
33、 and maintenance SANS 23297:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 23297:2008(E) 2 ISO 2008 All rights reserved3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 8330 apply. 4 Cl
34、assification 4.1 Classes Eight classes of hose are specified, distinguished by their maximum working pressure, as shown in Table 1. Each class may be manufactured in up to 10 nominal sizes. Table 1 Classes, nominal size and maximum working pressure Class 35 70 140 210 280 350 420 560 MWP a(bar) 35 7
35、0 140 210 280 350 420 560 MWP a(MPa) 3,5 7 14 21 28 35 42 56 Nominal size 3,2 X X X X X X X X 5 X X X X X X X X 6,3 X X X X X X X X 8 X X X X X X X X 10 X X X X X X X X 12,5 X X X X X X X X 16 X X X X X X X X 19 X X X X X X X X 25 X X X X X X X X 31,5 X X X X X X X X aMaximum working pressure. 4.2 T
36、ypes Two types are specified according to their construction: type 1 with adhesion between the layers; and type 2 without adhesion between the layers. In type 1 hoses, the lining and cover are adhesively bonded (i.e. only separable by force) to the reinforcement; in type 2 hoses, these layers are no
37、t attached to the reinforcement. 4.3 Grades Hoses are classified according to their resistance to impulse into four grades: A, B, C and D, as shown in Table 2. Table 2 Grades Resistance to impulse Grade Temperature C Impulse pressure (% of MWP a) Minimum number of cycles A 100 133 % 200 000 B 100 13
38、3 % 500 000 133 % (classes 35, 70, 140, 210) C 120 120 % (classes 280, 350, 420, 560) 500 000 133 % (classes 35, 70, 140, 210) D 120 120 % (classes 280, 350, 420, 560) 1 000 000 aMaximum working pressure. SANS 23297:2009This s tandard may only be used and printed by approved subscription and freemai
39、ling clients of the SABS .ISO 23297:2008(E) ISO 2008 All rights reserved 3The maximum working pressure by class is shown in Table 3. Table 3 Maximum working pressure Class 35 70 140 210 280 350 420 560 MWP a(bar) 35 70 140 210 280 350 420 560 MWP a(MPa) 3,5 7 14 21 28 35 42 56 Grade A X X X X X X X
40、X B X X X X X X X X C X X X X X X X X D X X X X X X X X NOTE X = Applicable. aMaximum working pressure. 5 Materials and construction 5.1 Hoses Hoses shall consist of a hydraulic-fluid-resistant thermoplastic lining, one or multiple layers of steel wire or synthetic yarn and an oil- and weather-resis
41、tant thermoplastic cover. Other protective materials over the thermoplastic cover are allowed for improved abrasion or other resistance. 5.2 Hose assemblies Hose assemblies shall only be manufactured with those hose fittings which conform to the requirements of 7.2.1, 7.2.4 and 7.2.5 of this Interna
42、tional Standard. Follow the manufacturers instructions for proper preparation and fabrication of hose assemblies. 6 Dimensions and tolerances 6.1 Diameters When measured in accordance with ISO 4671, the diameters of the hoses shall conform to the values given in Table 4. SANS 23297:2009This s tandar
43、d may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 23297:2008(E)4 ISO2008 AllrightsreservedTable 4 Diameters ofhoses Inside diameter(all classes) mmMaximum outside diameterof hose mmNominal size min. max.Class 35 Class 70 Class 140 Class 210 Class 280 Cl
44、ass 350 Class 420 Class 560 3,2 3,1 4,0 8 8 9 9,5 9,5 9,5 10,5 10,5 5 4,6 5,4 10 10 11 12 12 12 14 15 6,3 6,1 7,0 12 12 14 14 14 14 16 16 8 7,7 8,5 13 13 15,5 15,5 (16,6 a) 16 16 17 17 10 9,3 10,3 16 16 17,5 18,5 19 19 20 21 12,5 12,3 13,5 20 20 21 23 23 23 24 25 16 15,5 16,8 23 23 25 27 (28a) 28 28
45、 28 29 19 18,6 19,8 27 28 29 32 32 33 33 34 25 25,0 26,4 34 36 36 39 (40,4a) 39 40,5 40,5 43,5 31,5 31,4 33,0 45 45 46 48 49 50 50 51,5 aThese dimensionsareallowable for textile yarn braided reinforcementonly;for metalwire braided reinforcementofother classesand sizes,the standard dimensions apply.S
46、ANS 23297:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 23297:2008(E) ISO 2008 All rights reserved 56.2 Outer cover thickness When measured in accordance with ISO 4671, the outer cover thickness of the hoses shall conform to the val
47、ues given in Table 5. Table 5 Outer cover thickness Outer cover thickness mm Nominal size min. max. 3,2 0,1 1,4 5 0,1 1,4 6,3 0,1 1,4 8 0,1 1,4 10 0,1 1,4 12,5 0,2 1,5 16 0,2 1,5 19 0,2 1,5 25 0,2 1,5 31,5 0,4 1,7 6.3 Concentricity When measured in accordance with ISO 4671, the concentricity of the
48、hoses shall conform to the values given in Table 6. Table 6 Concentricity of hoses Maximum variation in wall thickness Between internal diameter and outside diameter Between internal diameter and outside diameter of the tubing Nominal size mm mm Wire Textile 3,2, 5 and 6,3 0,5 0,8 0,2 over 6,3 and u
49、p to and including 19 0,8 1,0 0,5 25 1,1 1,3 0,6 31,5 1,2 1,3 0,7 SANS 23297:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .ISO 23297:2008(E) 6 ISO 2008 All rights reserved7 Physical properties 7.1 Fluid and UV resistance of thermoplastic compounds 7.1.1 Fluid resistance 7.1.1.1 Test pieces The fluid resistance tests shall be carried out on extruded sheets of lining and cover compound having minimum thickness
