1、May 2007DEUTSCHE NORM English price group 10No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 23.100.60!,x“9856199www.di
2、n.deDDIN EN ISO 6149-2Connections 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 forheavy-duty (S series) stud ends (ISO 6149-2:2006)English version of DIN EN ISO 6149-2:2007-05Lei
3、tungsanschlsse fr Fluidtechnik und allgemeine Anwendung Einschraublcher und Einschraubzapfen mit metrischem Gewinde nach ISO 261 undO-Ring-Abdichtung Teil 2: Mae, Konstruktion, Prfverfahren und Anforderungen fr Einschraubzapfen,schwere Reihe (S-Reihe) (ISO 6149-2:2006)Englische Fassung DIN EN ISO 61
4、49-2:2007-05SupersedesDIN ISO 6149-2:1996-11www.beuth.deDocument comprises 17 pages 08.07DIN EN ISO 6149-2:2007-05 2 National foreword This standard has been published in accordance with a decision taken by ECISS/TC 29 “Steel tubes and fittings for steel tubes” (Secretariat: UNI, Italy) to adopt, wi
5、thout alteration, International Standard ISO 6149-2 as a European Standard. The responsible German body involved in its preparation was the Normenausschuss Rohrleitungen und Dampfkesselanlagen (Pipelines and Boilers Standards Committee), Technical Committee NA 082-00-07 AA Rohrverschraubungen. The D
6、IN Standards corresponding to the International Standards referred to in clause 2 of the EN are as follows: ISO 48 DIN ISO 48 ISO 261 DIN ISO 261 ISO 965-1 DIN ISO 965-1 ISO 4759-1 DIN EN ISO 4759-1 ISO 5598 E DIN ISO 5598 ISO 19879 DIN EN ISO 19879 Amendments This standard differs from DIN ISO 6149
7、-2:1996-11 as follows: a) The current standards on screwed connections and relevant tests have been taken into account. b) Some dimensions have been changed. c) The standard has been editorially revised. Previous editions DIN 3852-3: 1991-11 DIN ISO 6149-2: 1996-11 National Annex NA (informative) Bi
8、bliography DIN EN ISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts; Product grades A, B and C DIN EN ISO 19879, Metallic tube connections for fluid power and general use Test methods for hydraulic fluid power connections DIN ISO 48, Rubber, vulcanized or thermoplastic Deter
9、mination of hardness (hardness between 10 IRHD and 100 IRHD) DIN ISO 261, ISO general purpose metric screw threads General plan DIN ISO 965-1, ISO general purpose metric screw threads Tolerances Part 1: Principles and basic data E DIN ISO 5598, Fluid power systems and components Vocabulary EUROPEAN
10、STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 6149-2 February 2007 ICS 23.100.40 English Version 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
11、series) stud ends (ISO 6149-2:2006) Raccordements pour transmissions hydrauliques et applications gnrales - Orifices et lments mles filetage mtrique ISO 261 et joint torique - Partie 2: Dimensions, conception, mthodes dessai et exigences des lments mles de srie lourde (srie S) (ISO 6149-2:2006) Leit
12、ungsanschlsse fr Fluidtechnik und allgemeine Anwendung - Einschraublcher und Einschraubzapfen mit metrischem Gewinde nach ISO 261 und O-Ring-Abdichtung - Teil 2: Mae, Konstruktion, Prfverfahren und Anforderungen fr Einschraubzapfen, schwere Reihe (S-Reihe) (ISO 6149-2:2006) This European Standard wa
13、s 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 European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such n
14、ational standards 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). A version in any other language made by translation under the responsibility of a CEN member into its own language a
15、nd notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembou
16、rg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All right
17、s of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 6149-2:2007: EContents Page Introduction 1 Scope . 2 Normative references . 3 Terms and definitions. 4 Dimensions 5 Requirements 6 O-rings . 7 Test methods. 8 Designation of stud ends. 9 Ident
18、ification 10 Identification statement (reference to this part of ISO 6149). Bibliography . 2 666777714Foreword .34557EN ISO 6149-2:2007 (E) Foreword The text of ISO 6149-2:2006 has been prepared by Technical Committee ISO/TC 131 “Fluid power systems” of the International Organization for Standardiza
19、tion (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 given the status of a national standard, either by publication of an identical text or by e
20、ndorsement, 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 organizations of the following countries are bound to implement this European Standard: Austria, Bel
21、gium, Bulgaria, Cyprus, Czech Republic, 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. Endorsement notice Th
22、e text of ISO 6149-2:2006 has been approved by CEN as EN ISO 6149-2:2007 without any modifications. 3 EN ISO 6149-2:2007 (E) Introduction In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit. In general applications, a fluid
23、 (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 applications, ISO/TC
24、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 p
25、orts 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 systems worldw
26、ide. 4 EN ISO 6149-2:2007 (E) 1 Scope This part of ISO 6149 specifies dimensions, 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
27、to 63 MPa 630 bar1) for non-adjustable stud ends and 40 MPa (400 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 guara
28、ntee 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 connec
29、tion ends made from carbon steel. NOTE 2 This part of ISO 6149 applies to 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 recommendati
30、ons 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 edi
31、tion 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 Toleran
32、ces Part 1: Principles and basic data ISO 3601-3:2005, Fluid power systems O-rings Part 3: Quality acceptance criteria 1) 1 bar = 0,1 MPa = 105Pa; 1 MPa = 1 N/mm2. 5 EN ISO 6149-2:2007 (E) ISO 4759-1, Tolerances for fasteners Part 1: Bolts, screws, studs and nuts Product grades A, B and C ISO 55982)
33、, Fluid power systems and components Vocabulary 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 app
34、ly. 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 th
35、at does not require specific orientation before final tightening of the connection, because it is 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 accor
36、dance with ISO 4759-1, product grade C. 5 Requirements 5.1 Working pressure Heavy-duty (S series) 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
37、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 s
38、lip 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 Ta
39、ble 3. Any 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. 2) To be published. (Revision of 5598:1985) 6 EN ISO 6149-2:2007 (E) 6 O-rings O-rings for use with heavy-duty (S series)
40、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
41、of (90 5) IRHD, measured as 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 u
42、sed 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
43、stud ends Heavy-duty (S series) stud ends shall be designated by a) “Stud end”; b) reference to this part of ISO 6149; i.e. ISO 6149-2; c) 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 6149-2 - M18 1,5 9
44、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 d
45、iameter, 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 e
46、nds 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: “Heavy-duty (S ser
47、ies) stud ends conform to ISO 6149-2:2006, 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.” 7 EN ISO 6149-2:2007 (E) Dimensions in m
48、illimetres 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 heavy-duty (S
49、series) stud end 8 EN ISO 6149-2:2007 (E) Dimensions 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 heavy-duty (S series) stud end 9 EN ISO 6149-2:2007 (E) Table 1 Dimensions of heavy-duty (S series) stud ends Dimensions in millimetres Threadad2d3d4d5d6d7L1L2L3L4L5L6L7L8L
