ISO 6149-3 2006

Reference numberISO 6149-3:2006(E)©ISO 2006INTERNATIONAL STANDARD ISO6149-3Second edition2006-02-15Connections for hydraulic fluid power and general use — Ports and stud ends with ISO 261 metric threads and O-ring sealing — Part 3: Dimensions, design, test methods and requirements for light-duty (L series) stud ends Raccordements pour transmissions hydrauliques et applications générales — Orifices et éléments mâles à filetage métrique ISO 261 et joint torique — Partie 3: Dimensions, conception, méthodes d essai et exigences des éléments mâles de série légère (série L) Copyright International Organization for Standardization Provided by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--`,,```,,,,````-`-`,,`,,`,`,,`---ISO 6149-3:2006(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe s 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 Adobe s 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; 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 2006 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 photocopying and microfilm, without permission in writing from either ISO at the address below or ISO s 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 copyright@iso.org Web www.iso.org Published in Switzerland ii © ISO 2006 – All rights reservedCopyright International Organization for Standardization Provided by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--`,,```,,,,````-`-`,,`,,`,`,,`---ISO 6149-3:2006(E) © ISO 2006 – All rights reserved iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 2 4 Dimensions 2 5 Requirements 2 6 O-rings . 3 7 Test methods. 3 8 Designation of stud ends. 3 9 Identification 3 10 Identification statement (reference to this part of ISO 6149). 3 Bibliography . 10 Copyright International Organization for Standardization Provided by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--`,,```,,,,````-`-`,,`,,`,`,,`---ISO 6149-3:2006(E) iv © ISO 2006 – All rights reservedForeword ISO (the International Organization 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 the 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. International 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. 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 document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 6149-3 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 4, Connectors and similar products and components. This second edition cancels and replaces the first edition (ISO 6149-3:1993), which has been technically revised. ISO 6149 consists of the following parts, under the general title Connections for hydraulic fluid power and general use — Ports and stud ends with ISO 261 metric threads and O-ring sealing: — Part 1: Ports with truncated housing for O-ring seal — Part 2: Dimensions, design, test methods and requirements for heavy-duty (S series) stud ends — Part 3: Dimensions, design, test methods and requirements for light-duty (L series) stud ends — Part 4: Dimensions, design, test methods and requirements of external and internal hexport plugs Copyright International Organization for Standardization Provided by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--`,,```,,,,````-`-`,,`,,`,`,,`---ISO 6149-3:2006(E) © ISO 2006 – All rights reserved vIntroduction In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit. In general applications, a fluid (liquid or gas) may be conveyed under pressure. Components are connected through their threaded ports by stud ends on fluid conductor connectors to tubes and pipes or to hose connectors and hoses. For threaded ports and stud ends specified in new designs in hydraulic fluid power applications, ISO/TC 131/SC 4 recommends that the ISO 6149 series be used because these International Standards specify ports and stud ends with metric threads and O-ring sealing and because the subcommittee would like to help users by recommending one preferred system. ISO/TC 131/SC 4 further recommends that threaded ports and stud ends in accordance with the ISO 1179 series, ISO 9974 series and ISO 11926 series not be used for new designs in hydraulic fluid power applications; these International Standards will be maintained because they specify ports and stud ends that are currently used in hydraulic systems worldwide. Copyright International Organization for Standardization Provided by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--`,,```,,,,````-`-`,,`,,`,`,,`---Copyright International Organization for Standardization Provided by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--`,,```,,,,````-`-`,,`,,`,`,,`---INTERNATIONAL STANDARD ISO 6149-3:2006(E)© ISO 2006 – All rights reserved 1Connections for hydraulic fluid power and general use — Ports and stud ends with ISO 261 metric threads and O-ring sealing — Part 3: Dimensions, design, test methods and requirements for light-duty (L series) stud ends 1 Scope This part of ISO 6149 specifies dimensions, performance requirements and test procedures for metric adjustable and non-adjustable light-duty (L series) stud ends and O-rings. Stud ends in accordance with this part of ISO 6149 may be used at working pressures up to 40 MPa [400 bar1)] for non-adjustable stud ends and 31,5 MPa (315 bar) for adjustable stud ends. The permissible working pressure depends upon the stud end size, materials, design, working conditions, application, etc. Conformance to the dimensional information in this part of ISO 6149 does not guarantee rated performance. Each manufacturer should perform testing according to the specification contained in this part of ISO 6149 to assure that components comply with the performance ratings. NOTE 1 A significant number of tests have been conducted to confirm the performance requirements of connection ends made from carbon steel. NOTE 2 This part of ISO 6149 applies to connectors detailed in ISO 8434-1 and ISO 8434-2 (see ISO 12151-4 for related hose fitting specification). NOTE 3 The Introduction of this part of ISO 6149 gives recommendations for ports and stud ends to be used for new designs in hydraulic fluid power applications. 2 Normative references The following referenced 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 48, Rubber, vulcanized or thermoplastic — Determination of hardness (hardness between 10 IRHD and 100 IRHD) ISO 261, ISO general purpose metric screw threads — General plan ISO 965-1, ISO general purpose metric screw threads — Tolerances — Part 1: Principles and basic data ISO 3601-3:2005, Fluid power systems — O-rings — Part 3: Quality acceptance criteria ISO 4759-1, Tolerances for fasteners — Part 1: Bolts, screws, studs and nuts — Product grades A, B and C 1) 1 bar = 0,1 MPa = 105Pa; 1 MPa = 1 N/mm2. Copyright International Organization for Standardization Provided by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--`,,```,,,,````-`-`,,`,,`,`,,`---ISO 6149-3:2006(E) 2 © ISO 2006 – All rights reservedISO 55982), Fluid power systems and components — Vocabulary ISO 6149-2, Connections for hydraulic fluid power and general use — Ports and stud ends with ISO 261 metric threads and O-ring sealing — Part 2: Dimensions, design, test methods and requirements for heavy-duty (S series) stud ends ISO 19879, Metallic tube connections for fluid power and general use — Test methods for hydraulic fluid power connections 3 Terms and definitions For the purposes of this part of ISO 6149, the terms and definitions given in ISO 5598 and the following apply. 3.1 adjustable stud end stud end connector that allows for connector orientation through final tightening of the locknut to complete the connection NOTE This type of stud end is typically used on shaped connectors (e.g. tees, crosses and elbows). 3.2 non-adjustable stud end stud end connector that does not require specific orientation before final tightening of the connection, because it is only used on straight connectors 4 Dimensions Light-duty (L series) stud ends shall conform to the dimensions given in Figures 1 and 2 and given in Table 1. Hex tolerances across flats shall be in accordance with ISO 4759-1, product grade C. 5 Requirements 5.1 Working pressure Light-duty (L series) stud ends made of low carbon steel shall be designed for use at the working pressures given in Table 2. 5.2 Performance Light-duty (L series) stud ends made of low carbon steel shall meet or exceed the burst and impulse pressures given in Table 2, when submitted to burst and cyclic endurance (impulse) tests conducted in accordance with Clause 7 and assembled using the torques in Table 5. 5.3 Flatness and fit of adjustable stud end washers The washer shall be clinched to the stud end with a tight slip fit to an interference fit. The slip fit shall be tight enough so that the washer cannot be shaken loose to cause it to drop from its uppermost position by its own weight. The locknut torque needed to move the washer at the maximum washer interference fit shall not exceed the torques given in Table 3. 2) To be published. (Revision of 5598:1985) Copyright International Organization for Standardization Provided by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS--`,,```,,,,````-`-`,,`,,`,`,,`---ISO 6149-3:2006(E) © ISO 2006 – All rights reserved 3Any washer surface that is out of flatness shall be uniform (i.e. not wavy) and concave with respect to the stud end and shall conform to the allowances given in Table 3. 6 O-rings O-rings for use with light-duty (L series) stud ends shall conform to the dimensions shown in Figure 3 and given in Table 4. Unless otherwise specified, for use with petroleum base hydraulic fluids at the pressure and temperature requirements in Clause 5 and Table 2 and for testing, the O-rings shall be made of NBR (nitrile) with a hardness of (90 ± 5) IRHD, measured per ISO 48, and shall conform to the dimensions given in Table 4 and shall meet or exceed the O-ring quality acceptance criteria for grade N of ISO 3601-3. In those cases where the pressure and temperature requirements of this part of ISO 6149 and/or the hydraulic fluid used in the system differ from those specified in Clause 5 and Table 2, the connector manufacturer shall be consulted to ensure that an appropriate O-ring material is selected. 7 Test methods Burst and cyclic endurance (impulse) tests shall be conducted in accordance with ISO 19879. 8 Designation of stud ends Light-duty (L series) stud ends shall be designated by ⎯ “Stud end”; ⎯ reference to this part of ISO 6149; i.e. ISO 6149-3; ⎯ thread size (d1× P). EXAMPLE A stud end in accordance with this part of ISO 6149, with a thread M18× 1,5 is designated as follows: Stud end ISO 6149-3 - M18 × 1,5 9 Identifi