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 978-0-626-21753-2 SANS 2398:2008 Edition 1 ISO 2398:2006 Edition 5SOUTH AFRICAN NATIONAL STANDARD Rubber hoses, textile-reinforced, for compressed a
4、ir Specification This national standard is the identical implementation of ISO 2398:2006 and is adopted with the permission of the International Organization for Standardization. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: +27 12 428 7911 Fax
5、: +27 12 344 1568 www.sabs.co.za SABS This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 2398:2008 Edition 1 ISO 2398:2006 Edition 5 Table of changes Change No. Date Scope National foreword This South African standard was approved by National
6、 Committee SABS TC 45, Rubber and rubber products, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. For application in South Africa the specification shall cover compressed-air and water applications (see title and scope). This SANS d
7、ocument was published in September 2008. This standard may only be used and printed by approved subscription and freemailing clients of the SABS. Reference number ISO 2398:2006(E) ISO 2006INTERNATIONAL STANDARD ISO 2398 Fifth edition 2006-04-15 Rubber hoses, textile-reinforced, for compressed air Sp
8、ecification Tuyaux en caoutchouc renforcs textile pour lair comprim Spcifications SANS 2398:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 2398:2006(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Ado
9、bes 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 Adobes licensing policy
10、. 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 car
11、e 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 2006 All rights reserved. Unless otherwise specified, no part of this publication may
12、 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 requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel.
13、+ 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2006 All rights reservedSANS 2398:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 2398:2006(E) ISO 2006 All rights reserved
14、iii Contents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 2 4 Classification. 2 5 Materials and construction 2 6 Dimensions 2 6.1 Internal diameters and tolerances 2 6.2 Concentricity . 3 6.3 Tolerance on length 3 6.4 Minimum thickness of lining and cover . 4 7 Ph
15、ysical properties. 4 7.1 Rubber compounds 4 7.2 Finished hose 5 8 Marking 5 SANS 2398:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 2398:2006(E) iv ISO 2006 All rights reservedForeword ISO (the International Organization for Standardi
16、zation) 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 the right to b
17、e 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. International Standa
18、rds 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. Publication as an Inter
19、national 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. ISO 2398 wa
20、s prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 1, Hoses (rubber and plastics). This fifth edition cancels and replaces the fourth edition (ISO 2398:1995), which has been technically revised. SANS 2398:2008This standard may only be used and printed by approve
21、d subscription and freemailing clients of the SABS.INTERNATIONAL STANDARD ISO 2398:2006(E) ISO 2006 All rights reserved 1 Rubber hoses, textile-reinforced, for compressed air Specification WARNING Persons using this International Standard should be familiar with normal laboratory practice. This stan
22、dard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate health and safety practices and to ensure compliance with any national regulatory conditions. 1 Scope This International Standard specifies the
23、requirements for three types, three classes and two categories of textile-reinforced rubber hose for compressed air, up to a maximum working pressure of 25 bar 1)with an operating-temperature range of 40 C to + 70 C, depending on the type and category. 2 Normative references The following referenced
24、 documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 37, Rubber, vulcanized or thermoplastic Determination of tensile stre
25、ss-strain properties ISO 188, Rubber, vulcanized or thermoplastic Accelerated ageing and heat resistance tests ISO 1307, Rubber and plastics hoses Hose sizes, minimum and maximum inside diameters and tolerances on cut lengths ISO 1402, Rubber and plastics hoses and hose assemblies Hydrostatic testin
26、g ISO 1746:1998, Rubber or plastics hoses and tubing Bending tests ISO 1817, Rubber, vulcanized Determination of the effects of liquids ISO 4671, Rubber and plastics hoses and hose assemblies Methods of measurement of dimensions ISO 4672:1997, Rubber and plastics hoses Sub-ambient temperature flexib
27、ility tests ISO 7326:1991, Rubber and plastics hoses 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 1) 1 bar = 0,1 MPaSANS 2398:2008This standar
28、d may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 2398:2006(E) 2 ISO 2006 All rights reserved3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 8330 apply. 4 Classification Hoses are designated as one of the
29、 following types, depending on their pressure rating: Type 1: Low pressure Designed for a maximum working pressure of 10 bar Type 2: Medium pressure Designed for a maximum working pressure of 16 bar Type 3: High pressure Designed for a maximum working pressure of 25 bar These types can be sub-divide
30、d into three classes depending on their oil resistance: Class A Non-oil-resistant Class B Nominal oil resistance Class C Good oil resistance The types and classes above can also be further sub-divided into two categories, depending on their operating-temperature range: Category N-T (Normal Temperatu
31、re) 25 C to + 70 C Category L-T (Low Temperature) 40 C to + 70 C 5 Materials and construction The hose shall consist of: a rubber lining; a reinforcement of natural or synthetic textile, applied by any suitable technique; a rubber cover. The lining and cover shall be of uniform thickness, concentric
32、 to comply with the minimum thickness specified, and free from holes, porosity and other defects. The cover finish may be smooth or fabric-marked. 6 Dimensions 6.1 Internal diameters and tolerances When measured in accordance with ISO 4671 the internal diameters and their tolerances shall conform to
33、 the values specified in Table 1. SANS 2398:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 2398:2006(E) ISO 2006 All rights reserved 3 Table 1 Minimum and maximum internal diameters Hose size Minimum internal diameter mm Maximum intern
34、al diameter mm 4 3,25 4,75 5 4,25 5,75 6,3 5,55 7,05 8 7,25 8,75 10 9,25 10,75 12,5 11,75 13,25 16 15,25 16,75 19 18,25 19,75 20 19,25 20,75 25 23,75 26,25 31,5 30,25 32,75 38 36,50 39,50 40 38,50 41,50 51 49,50 52,50 63 61,50 64,50 76 74,50 77,50 80 78,00 82,00 100 98,00 102,00 102 100,00 104,00 6.
35、2 Concentricity When determined in accordance with ISO 4671, the concentricity, based on a total indicator reading between the internal diameter and the outside surface of the cover, shall be no greater than 1,0 mm for hoses of internal diameter up to and including 76 mm, and no greater than 1,5 mm
36、for hoses of inside diameter greater than 76 mm. 6.3 Tolerance on length The tolerance on cut lengths shall be as specified in ISO 1307, the length being measured in accordance with ISO 4671. SANS 2398:2008This standard may only be used and printed by approved subscription and freemailing clients of
37、 the SABS.ISO 2398:2006(E) 4 ISO 2006 All rights reserved6.4 Minimum thickness of lining and cover When measured in accordance with ISO 4671, the minimum thickness of the lining and cover shall be as follows: Type 1 lining 1,0 mm cover 1,5 mm Type 2 lining 1,5 mm cover 2,0 mm Type 3 lining 2,0 mm co
38、ver 2,5 mm 7 Physical properties 7.1 Rubber compounds When determined by the methods listed in Table 2, the physical properties of the compounds used for the lining and cover shall conform to the values specified in Table 2. Tests shall be carried out either on samples taken from the hose or from se
39、parately vulcanized sheets, 2 mm in thickness and vulcanized to the same cure state as the production hoses. Table 2 Physical properties of rubber compounds Requirement Property Lining Cover Test method Minimum tensile strength 7,0 MPa 7,0 MPa ISO 37 (dumb-bell test piece) Minimum elongation at brea
40、k 250 % 250 % ISO 37 (dumb-bell test piece) Resistance to ageing Change in tensile strength from original value (max.) 25 % 25 % Change in elongation at break from original value (max.) 50 % 50 % ISO 188 (3 days at 100 C 1 C), air-oven method ISO 37 (dumb-bell test piece) Resistance to liquids Incre
41、ase in volume (class A) N/A N/A Increase in volume (max.) (class B only) 115 % No shrinkage allowed N/A ISO 1817 (72 h at 70 C 2 C in oil No. 3), gravimetric method Increase in volume (max.) (class C only) 30 % No shrinkage allowed 75 % No shrinkage allowed ISO 1817 (72 h at 70 C 2 C in oil No. 3),
42、gravimetric method SANS 2398:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 2398:2006(E) ISO 2006 All rights reserved 5 7.2 Finished hose When determined by the methods listed in Table 3, the physical properties of the finished hose sh
43、all conform to the values specified in Table 3. Table 3 Physical properties of finished hose Property Requirement Test method Proof pressure 20 bar (type 1) 32 bar (type 2) 50 bar (type 3) ISO 1402 Change in length at maximum working pressure 5 % ISO 1402 Change in diameter at maximum working pressu
44、re 5 % ISO 1402 Minimum burst pressure 40 bar (type 1) 64 bar (type 2) 100 bar (type 3) ISO 1402 Adhesion between components 2,0 kN/m (min.) ISO 8033 Ozone resistance No cracking observed under 2 magnification ISO 7326:1991 method 1 (up to 25 mm id) method 2 or 3 for other sizes Flexibility at 23 C
45、T/D not less than 0,8 ISO 1746:1998, method A Low-temperature flexibility No cracks and shall pass the proof test specified above ISO 4672:1997, method B Category N-T at 25 C 2 C Category L-T at 40 C 2 C 8 Marking The hose shall be continuously and durably marked with the following minimum informati
46、on: a) manufacturers name or identification; b) number and year of publication of this International Standard (ISO 2398:2006); c) hose type and class; d) category, if low-temperature (L-T); e) internal diameter, in mm; f) maximum working pressure, in bars; g) date of manufacture, by giving the quarter and year of manufacture or using another suitable date code. EXAMPLE MAN/ISO 2398:2006/2B/L-T/25 mm/16 bar/2Q06. SANS 2398:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.
