1、BRITISH STANDARDBS EN ISO 6149-2:2007Incorporating amendment no. 1 (renumbers BS ISO 6149-2:2006 as BS EN ISO 6149-2:2007)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
2、 for heavy-duty (S series) stud endsThe European Standard EN ISO 6149-2:2007 has the status of a British StandardICS 23.100.40g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60
3、g53g44g42g43g55g3g47g36g58BS EN ISO 6149-2:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2006 BSI 2007ISBN 0 580 48026 7National forewordThis British Standard was published by BSI. It is the UK implementation of EN ISO 6149-2:2
4、007. It is identical with ISO 6149-2:2006. It supersedes BS ISO 6149-2:1993 which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee MCE/18, Fluid power systems and components, to Subcommittee MCE/18/-/4, Connectors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 Comments17044 30 March 2007 Renumbers BS ISO 6149-2:2006 as BS EN ISO 6149-2:2007EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 6149-2February 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 2: Dimensions, design, test methods and requirements forheavy-duty (S series) stud ends (ISO 6149-2:2006)Raccordements pour transmissions hydrauliques etapplications gnrales - Orifices et lments mles filetage mtrique ISO 261 et joint tori
8、que - Partie 2:Dimensions, conception, mthodes dessai et exigencesdes lments mles de srie lourde (srie S) (ISO 6149-2:2006)Leitungsanschlsse fr Fluidtechnik und allgemeineAnwendung - Einschraublcher und Einschraubzapfen mitmetrischem Gewinde nach ISO 261 und O-Ring-Abdichtung - Teil 2: Mae, Konstruk
9、tion, Prfverfahren undAnforderungen fr Einschraubzapfen, schwere Reihe (S-Reihe) (ISO 6149-2:2006)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 th
10、e 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 Republ
12、ic, 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 NORMA
13、LISATIONEUROPISCHES 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 6149-2:2007: EForeword The text of ISO 6149-2:2006 has been prepared by Technical C
14、ommittee ISO/TC 131 “Fluid power systems” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 6149-2:2007 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
15、given 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 organizat
16、ions 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, Romani
17、a, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 6149-2:2006 has been approved by CEN as EN ISO 6149-2:2007 without any modifications. EN ISO 6149-2:2007Reference numberISO 6149-2:2006(E)INTERNATIONAL STANDARDISO6149-2Second edition2006-02-15Co
18、nnections 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 Raccordements pour transmissions hydrauliques et applications gnrales Orifices et lment
19、s mles filetage mtrique ISO 261 et joint torique Partie 2: Dimensions, conception, mthodes dessai et exigences des lments mles de srie lourde (srie S) EN ISO 6149-2:2007iiiiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references . 13 Terms and definitions. 24 Dimensions 25 Requireme
20、nts 26 O-rings . 37 Test methods. 38 Designation of stud ends. 39 Identification 310 Identification statement (reference to this part of ISO 6149). 3Bibliography . 10EN ISO 6149-2:2007ivForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards
21、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 organizat
22、ions, 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 th
23、e 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
24、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 6149-2 was prepared by Technical Committee ISO/TC 131, Fluid po
25、wer systems, Subcommittee SC 4, Connectors and similar products and components.This second edition cancels and replaces the first edition (ISO 6149-2:1993), which has been technically revised. ISO 6149 consists of the following parts, under the general title Connections for hydraulic fluid power and
26、 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
27、 (L series) stud ends Part 4: Dimensions, design, test methods and requirements of external and internal hexport plugsEN ISO 6149-2:2007vIntroduction In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit. In general applicati
28、ons, 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 fittings and hoses. For threaded ports and stud ends specified in new designs in hydraulic fluid power applicati
29、ons, 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 tha
30、t 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 are maintained because they specify ports and stud ends that are currently used in hydraulic sy
31、stems worldwide. EN ISO 6149-2:2007blank1Connections 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 1 Scope This part of ISO 6149 specifies dime
32、nsions, performance requirements and test procedures for metric adjustable and non-adjustable heavy-duty (S series) stud ends and O-rings. Stud ends in accordance with this part of ISO 6149 may be used at working pressures up to 63 MPa 630 bar1) for non-adjustable stud ends and 40 MPa (400 bar) for
33、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
34、 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
35、connectors detailed in ISO 8434-1, ISO 8434-3 and ISO 8434-4, and plugs in accordance with ISO 6149-4. 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
36、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
37、, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD)ISO 261, ISO general purpose metric screw threads General planISO 965-1, ISO general purpose metric screw threads Tolerances Part 1: Principles and basic dataISO 3601-3:2005, Fluid power systems O-
38、rings Part 3: Quality acceptance criteria1) 1 bar 0,1 MPa 105Pa; 1 MPa 1 N/mm2.EN ISO 6149-2:20072ISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and CISO 55982), Fluid power systems and components VocabularyISO 19879, Metallic tube connections for flui
39、d power and general use Test methods for hydraulic fluid power connections3 Terms and definitions For the purposes of this part of ISO 6149, the terms and definitions given in ISO 5598 and the following apply. 3.1adjustable stud end stud end connector that allows for connector orientation through fi
40、nal 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). 3.2non-adjustable stud end stud end connector that does not require specific orientation before final tightening of the connection, because it i
41、s only used on straight connectors 4 Dimensions Heavy-duty (S 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 Heavy-duty (S series)
42、 stud ends made of low carbon steel shall be designed for use at the working pressures given in Table 2.5.2 Performance Heavy-duty (S 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 (impuls
43、e) 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 sha
44、ken 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. Any washer surface that is out of flatness shall be uniform (i.e. not wavy) and concave with
45、 respect to the stud end and shall conform to the allowances given in Table 3. 2) To be published. (Revision of 5598:1985) EN ISO 6149-2:200736 O-rings O-rings for use with heavy-duty (S series) stud ends shall conform to the dimensions shown in Figure 3 and given in Table 4. Unless otherwise specif
46、ied, 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 as per ISO 48, and shall conform to the dimensions given in Table 4 and shall
47、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
48、 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 Heavy-duty (S series) stud ends shall be designated by a) “Stud end”; b) reference to this pa
49、rt of ISO 6149; i.e. ISO 6149-2; c) thread size (d1u 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 6149-2 - M18 u 1,5 9 Identification Heavy-duty (S 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 d1and a notch on
