1、BRITISH STANDARDBS EN ISO 6149-3:2007Incorporating amendment no. 1 (renumbers BS ISO 6149-3:2006 as BS EN ISO 6149-3:2007)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
2、 for light-duty (L series) stud endsThe European Standard EN ISO 6149-3:2007 has the status of a British StandardICS 23.100.40g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60
3、g53g44g42g43g55g3g47g36g58BS EN ISO 6149-3:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2006 BSI 2007ISBN 0 580 48029 1National forewordThis British Standard was published by BSI. It is the UK implementation of EN ISO 6149-3:2
4、007. It is identical with ISO 6149-3:2006. It supersedes BS ISO 6149-3:1993 which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee MCE/18, Fluid power systems and components, to Subcommittee MCE/18/-/4, Connectors and associated components.A list of organizat
5、ions represented on this subcommittee can be obtained on request to its secretary.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 cannot confer immunity from legal obligatio
6、ns.Amendments issued since publicationAmd. No. Date Comments17046 30 March 2007 Renumbers BS ISO 6149-3:2006 as BS EN ISO 6149-3:2007EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 6149-3February 2007ICS 23.100.40English VersionConnections for hydraulic fluid power and general use - Portsand s
7、tud ends with ISO 261 metric threads and O-ring sealing -Part 3: Dimensions, design, test methods and requirements forlight-duty (L series) stud ends (ISO 6149-3:2006)Raccordements pour transmissions hydrauliques etapplications gnrales - Orifices et lments mles filetage mtrique ISO 261 et joint tori
8、que - Partie 3:Dimensions, conception, mthodes dessai et exigencesdes lments mles de srie lgre (srie L) (ISO 6149-3:2006)Leitungsanschlsse fr Fluidtechnik und allgemeineAnwendung - Einschraublcher und Einschraubzapfen mitmetrischem Gewinde nach ISO 261 und O-Ring-Abdichtung - Teil 3: Mae, Konstrukti
9、on, Prfverfahren undAnforderungen fr Einschraubzapfen, leichte Reihe (L-Reihe) (ISO 6149-3:2006)This European Standard was approved by CEN on 4 February 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the
10、status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German).
11、 A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic
12、, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALI
13、SATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 6149-3:2007: EForeword The text of ISO 6149-3:2006 has been prepared by Technical Com
14、mittee ISO/TC 131 “Fluid power systems” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 6149-3:2007 by Technical Committee ECISS/TC 29 “Steel tubes and fittings for steel tubes“, the secretariat of which is held by UNI. This European Standard shall be gi
15、ven the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2007, and conflicting national standards shall be withdrawn at the latest by August 2007. According to the CEN/CENELEC Internal Regulations, the national standards organizatio
16、ns of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
17、 Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 6149-3:2006 has been approved by CEN as EN ISO 6149-3:2007 without any modifications. EN ISO 6149-3:2007Reference numberISO 6149-3:2006(E)INTERNATIONAL STANDARD ISO6149-3Second edition2006-02-15Con
18、nections 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 gnrales Orifices et lments
19、 mles filetage mtrique ISO 261 et joint torique Partie 3: Dimensions, conception, mthodes dessai et exigences des lments mles de srie lgre (srie L) EN ISO 6149-3:2007ii iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 2 4 Dimensions 2 5 Requ
20、irements 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 EN ISO 6149-3:2007iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of nation
21、al 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. Internatio
22、nal 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 rule
23、s 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 l
24、east 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
25、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 f
26、luid 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
27、for light-duty (L series) stud ends Part 4: Dimensions, design, test methods and requirements of external and internal hexport plugs EN ISO 6149-3:2007vIntroduction In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit. In ge
28、neral 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 flui
29、d 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 furth
30、er 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
31、 used in hydraulic systems worldwide. EN ISO 6149-3:2007blank1Connections 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 IS
32、O 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
33、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 pe
34、rform 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
35、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 Normati
36、ve 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 therm
37、oplastic 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 acce
38、ptance 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. EN ISO 6149-3:20072 ISO 55982), Fluid power systems and components Vocabulary ISO 6149-2, Connections for hydraulic fluid power and general use
39、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 definit
40、ions 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 typic
41、ally 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 confo
42、rm 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 giv
43、en 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
44、. 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
45、 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) EN ISO 6149-3:20073Any washer surface that is out of flatness shall be uniform (i.e. not wavy) and concave with respect to the stud end
46、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 requir
47、ements 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 c
48、ases 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 Bur
49、st 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 (d1u P). EXAMPLE A stud end in accordance with this part of ISO 6149, with a thread M18u 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 F
