BS ISO 06149-3-2006
BRITISH STANDARDBS ISO 6149-3:2006Connections 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 ICS 23.100.40g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS ISO 6149-3:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2006© BSI ISBN 0 580 48029 1National forewordThis British Standard reproduces verbatim ISO 6149-3:2006 and implements it as the UK national standard. It supersedes BS ISO 6149-3:1993 which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee MCE/18, Fluid powers systems and components, to Subcommittee MCE/18/-/4, Connectors and associated components, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations.— aid enquirers to understand the text;— present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed;— monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 11 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsReference numberISO 6149-3:2006(E)INTERNATIONAL 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) ii 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 BS ISO 6149-3:2006iv Foreword 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 BS ISO 6149-3:2006vIntroduction 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. BS ISO 6149-3:2006blank1Connections 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. BS ISO 6149-3:20062 ISO 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) BS ISO 6149-3:20063Any 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 r 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 u P). EXAMPLE A stud end in accordance with this part of ISO 6149, with a thread M18 u 1,5 is designated as follows: Stud end ISO 6149-3 - M18 u 1,5 9 Identification Light-duty (L series) stud ends shall be identified as shown in Figures 1 and 2 and in accordance with the dimensions given in Table 1. Non-adjustable (straight) stud ends shall be identified by a cylindrical machining of diameter d2and length L5, adjacent to thread d1, and a notch on diameter d2. Adjustable stud ends shall be identified by only a cylindrical machining of diameter d2and length L10, on the end of the locknut that is adjacent to the washer. In addition to this identification, for both the non-adjustable and adjustable stud ends, the manufacturer may mark the stud ends with the word “metric”. 10 Identification statement (reference to this part of ISO 6149) It is strongly recommended to manufacturers who have chosen to conform to this International Standard that the following statement be used in test reports, catalogues and sales literature: “Light-duty (L series) stud ends conform to ISO 6149-3:2006, Connections 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.” BS ISO 6149-3:20064 Dimensions in millimetres surface roughness in micrometres Key 1 clinch washer (see 5.3) aWidth across flats. bMachining required for identification of metric stud end (see Clause 8). cChamfer to minor diameter of thread. dThread. ePitch diameter. fFor reference only. gVariation. Figure 1 — Adjustable light-duty (L series) stud end BS ISO 6149-3:20065Dimensions in millimetres surface roughness in micrometres aWidth across flats. bNotch of optional shape, centrally located on L5; required for identification of metric stud end (see Clause 8). cChamfer to minor diameter of thread. dThread. ePitch diameter. Figure 2 — Non-adjustable light-duty (L series) stud end BS ISO 6149-3:20066 Table 1 — Dimensions of light-duty (L series) stud ends Dimensions in millimetres Threadad2d3d4d5d6d7L1L2L3L4bL5L6L7L8L9L10s (d1 u P) r 0,2 nom tol. r 0,400,1 0,40 00,3 r 0,2 r 0,2 min. r 0,2 r 0,10,30 r 0,1 r 0,08 ref. r 0,1 M8 u 1 11,8 3 r 0,1 12,5 6,4 8,1 6,4 5,5 6 16 8,5 1,6 2 4 0,9 8,6 1,5 12 M10 u 1 13,8 4,5 r 0,1 14,5 8,4 10,1 8,4 5,5 6 16 8,5 1,6 2 4 0,9 8,6 1,5 14 M12 u 1,5 16,8 6 r 0,1 17,5 9,7 12,1 9,7 7,5 7,5 20 11 2,5 3 4,5 0,9 11,1 2 17 M14 u 1,5c18,8 7,5 r 0,2 19,5 11,7 14,1 11,7 7,5 7,5 20 11 2,5 3 4,5 0,9 11,1 2 19 M16 u 1,5 21,8 9 r 0,2 22,5 13,7 16,1 13,7 8 7,5 20,5 11,5 2,5 3 4,5 0,9 11,6 2 22 M18 u 1,5 23,8 11 r 0,2 24,5 15,7 18,1 15,7 9 7,5 21,5 12,5 2,5 3 4,5 0,9 12,6 2,5 24 M22 u 1,5 26,8 14 r 0,2 27,5 19,7 22,1 19,7 9 8 22,5 13 2,5 3 5 1,25 12,8 2,5 27 M27 u 2 31,8 18 r 0,2 32,5 24 27,1 24 11 10 27,5 16 2,5 4 6 1,25 15,8 2,5 32 M30 u 2 35,8 21 r 0,2 36,5 27 30,1 27 11 10 27,5 16 2,5 4 6 1,25 15,8 2,5 36 M33 u 2 40,8 23 r 0,2 41,5
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