ISO INTERNATIONAL STANDARD 4039-2 First edition 1998-08-15 Road vehicles Pneumatic braking systems - Part 2: Pipes, male fittings and tapped holes with conical sealing surface Véhicules routiers Dispositifs de freinage pneumatique Partie 2: Tuyauteries, raccords males et logements a surface d'étancheite conique ISO Reference number ISO 4039-2:1998(E) ISO4039-2:1998(E) Foreword 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 liaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnical Commission (IEC) on all matters of electrotechnical standardization. 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. International Standard ISO 4039-2 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 2, Braking systems and equipment. Part 2: Pipes, male fittings and tapped holes with conical sealing surface Annexes A and B of this part of iSO 4039 are for information only @ISO1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic nternationalOrganizationforStandardization Casepostale56·CH-1211Geneve20·Switzerland Internet [email protected] Printed in Switzerland ii INTERNATIONAL STANDARD@ISO ISO 4039-2:1998(E) Road vehicles Pneumatic braking systems - Part 2: Pipes, male fittings and tapped holes with conical sealing surface 1 Scope This part of isO 4039 specifies the essential dimensions and material requirements for metallic and thermoplastic pipes, male fittings and tapped holes with a conical sealing surface, of the metric series, used in pneumatic braking systems on road vehicles using compressed air at a pressure below 2 MPa (20 bar). Annex A gives, for information, an indication as to the relationship between this part of IsO 4039 and ISO 6149, and a recommendation on how to indicate conformity with this part of iso 4039. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this part of parties to agreements based on this part of isO 4039 are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IsO 9227:1990, Corrosion tests in artificial atmospheres - Salt spray tests. 3 Pipes 3.1 Dimensions specified in table 2. Table 1 - Dimensions of pipes External diameter, D1 6 8 10 12 14 15 16 18 20 3.2 Materials Pipes may be made of metal (examples: steel, copper, copper alloys, etc.) or thermoplastics (example: polyamide, etc.). 3.3 Surface condition The inner and outer surfaces of the pipes shall be free from oxidation, and shall be smooth and clean. The outer surface shall be protected against corrosion. Sensitivity to corrosion shall be evaluated in accordance with one of the methods specified in isO 9227, to be agreed between the interested parties, but with a minimum exposure to salt spray of 200 h.