1、 STDmBSI BS EN IS0 9974-3-ENGL 2000 m 3624663 0863227 689 = BRITISH STANDARD Connections for general use and fluid power - Ports and stud ends with IS0 261 threads with elastomeric or metal-to-metal sealing - Part 3: Stud ends with metal-to-metal sealing (type B) The European Standard EN IS0 99743:2
2、000 has the status of a British Standard ICs 23.100.60 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMED BY COPYRIGHT LAW 35 EN IS0 )9743:2000 National foreword direction of the Engineering Amd. No. Sector Committee, was published under the authority of the Standards Committee and comes into effect
3、 on 15 August ZOO0 This British Standard is the official English language version of EN IS0 997432000. It is identical with IS0 997431996. The UK participation in its preparation was entrusted to Technical Committee MCE18, Fluid power systems and components, which has the responsibility to: Date Com
4、ments - aid enquirers to understand the text; - present to the responsible intemational/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; - monitor related intemational and European developments and promulgate them in the UK. A list
5、of organizations represented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards nody include an annex which lists normative references to international publications with their corresponding European publicatio
6、ns. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index“, or by using the “Find“ facility of the BSI Standards Electronic Catalogue. A British Standard
7、does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an i
8、nside front cover, the EN IS0 title page, the EN IS0 foreword page, the IS0 title page, pages ii and iu, a blank page, pages 1 to 8, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. I l Q BSI 082000 I I I I ISBN 0
9、1580 36269 8 STD.BSI BS EN IS0 9774-3-ENGL 2000 E 1624667 086313i9 451 EUROPEAN STANDARD EN IS0 9974-3 NORME EUROPENNE EUROPISCHE NORM May 2000 ICs 23.100.30 English version Connections for general use and fluid power - Ports and stud ends with IS0 261 threads with elastomeric or metal-to-metal seal
10、ing - Part 3: Stud ends with metal-to-metal sealing (type B) (IS0 9974-3: 1 996) Raccordements pour applications gnrales et transmissions hydrauliques et pneumatiques - Orifices et lments mles B filetage IS0 261 et joint en lastomre ou tanchbit mtal sur mtal - Pattie 3: Elments mles avec tanchbit mt
11、al sur mbtal (type B) (IS0 9974- 3: 1 996) Lenungsanschlsse ir Ruidechnik und allgemeine Anwendung - Einschraublcher und Einschraubzapfen mit Gewinde nach IS0 261 und Elastomerdichtung oder metallener Dichtkante - Teil 3 Einschraubzapfen mit metallener Dichtkante (Typ 6) (IS0 9974-31996) This Europe
12、an Standard was approved by CEN on 8 April 2000. CEN members are bound to comply with the CEWCENELEC Intemal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-todate lists and bibliographical references concernin
13、g such national standards may be obtained on application to the Central Secretariat 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 lang
14、uage and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland. Italy, Luxembourg, Netherlands, Norway. Portugal, Spain, Sweden,
15、Switzerland and United Kingdom. EUROPEAN COMMITEE FOR STANDARDEATION EUROPISCHES KOMITEE FOR NORMUNG COMITE EUROPEEN DE NORMALISATION Central Secretariat: rue de Stassart, 36 8-1050 Brussels Q 2000 CEN Ail rights of exploitation in any form and by any means reserved worldwide for CEN national Member
16、s. Ref. No. EN IS0 9974-3:2000 E STDmBSI BS EN IS0 9974-3-ENGL 2000 Lb24669 0863L20 173 EN IS0 9974-3:2000 Foreword The text of the International Standard from Technical Committee ISO/TC 5 “Ferrous metal pipes and metallic fittings“ and ISO/TC 131 “Fluid power systems“ of the Intemational Organizati
17、on for Standardization (SO) has been taken over as an European Standard by Technical Committee ECISSTTC 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 identic
18、al text or by endorsement, at the latest by November 2000, and conflicting national standards shall be withdrawn at the latest by November 2000. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Stan
19、dard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard IS0 9974-3:1996 has been approved by CEN
20、 as a European Standard without any modif ication. NOTE: Normative references to International Standards are listed in annex ZA (normative). I NTER NATI O NAL STANDARD IS0 9974-3 First edition 1996-04-1 5 Connections for general use and fluid power - Ports and stud ends with IS0 261 threads with ela
21、stomeric or metal-to-metal sealing - Part 3: Stud ends with metal-to-metal sealing (type B) Raccordements pour applications gnrales et transmissions hydrauliques et pneumatiques - Orifices et lments mles filetage IS0 261 et joint en lastomre ou tanchit mtal sur mtal - Partie 3: Llments mles avec tan
22、chit mtal sur mtal (type 8) Reference number IS0 9974-3:1996(E) Foreword IS0 (the International Organization for Standardization) is a worldwide fed- eration of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical
23、committees. Each member body interested in a subject for which a technical committee has been established has the right to be rep- resented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 col- laborates closely w
24、ith the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are cir- culated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 %
25、of the member bodies casting a vote. International Standard IS0 9974-3 was prepared jointly by Technical Committees ISOflC 5, Ferrous metal pipes and metallic fittings, Sub- committee SC 5. Threaded or plain end butt-welding fittings, threads, gauging of threads, and ISOflC 131, Huid power systems,
26、Subcommittee SC 4, Connectors and similar products and components. IS0 9974 consists of the following parts, under the general title Connec- tions for general use and fluid power - Ports and stud ends with IS0 267 threads with elastomeric or metal-to-metal sealing. - Part 1: Threadedports - - The pe
27、rformance requirements, dimensions and designs are defined for port and stud end connections for the L and S series in IS0 9974-2 and for the LL, L and S series in IS0 9974-3. Significant testing over more than 30years of use has confirmed the performance requirements of these port and stud end conn
28、ections. Stud ends conforming to IS0 9974-2 and 9974-3 are identical to those conforming to DIN 3852-1. IS0 9974-2 stud ends are used on IS0 8434-1 and IS0 8434-4 fittings, and IS0 9974-3 stud ends are used on IS0 8434-1 fittings. Annex A forms an integral part of this part of IS0 9974. Annex B is f
29、or information only. Part 2: Stud ends with elastomeric sealing (type E) Part 3: Stud ends with metal-to-metal sealing (type B) II Introduction In fluid power systems, power is transmitted and controlled through a fluid (liquid or gas) under pressure within an enclosed circuit. In general appli- cat
30、ions, a fluid may be conveyed under pressure. Components are connected through their threaded ports by stud ends on fluid conductor fittings to tubes and pipes or to hose fittings and hoses. . 111 STD-BSI BS EN IS0 997Ll-3-ENGL 2000 111 Lb24669 0863124 819 9 EN IS0 9974-3:2000 Connections for genera
31、l use and fluid power - Ports and stud ends with IS0 261 threads with elastomeric or metal-to-metal sealing - Part 3: Stud ends with metal-to-metal sealing (type 6) 1 Scope This part of IS0 9974 specifies dimensions, perform- ance requirements and test procedures for heavy-duty (S series), light-dut
32、y (L series) and extra-lightduty (LL series) stud ends with IS0 261 threads and metal- to-metal sealing. It also specifies the designation of these stud ends. These stud ends should not be used for leak-free hydraulic fluid power applications be- cause they may leak if re-used. Stud ends in accordan
33、ce with this part of IS09974 may be used at working pressures up to 10 MPa (100 bar 1) for the LL series, 25 MPa (250 bar) for the L series and 40 MPa (400 bar) for the S series. The permissible working pressure depends upon the stud end size, materials, design, working conditions, appli- cation, et
34、c. For threaded ports and stud ends specified in new designs in hydraulic fluid power applications, only IS06149 is to be used. Threaded ports and stud ends in accordance with IS0 1179, IS0 9974 and IS0 11926 are not to be used for new designs in hydraulic fluid power applications. Conformance to th
35、e dimensional information in this part of IS0 9974 does not guarantee rated perform- ance. Each manufacturer should perform testing according to the specification contained in this part of IS0 9974 to assure that components comply with the performance ratings. 2 Normative references The following st
36、andards contain provisions which, through reference in this text, constitute provisions of this part of IS0 9974. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of IS09974 are encouraged to investigat
37、e the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Stan- dards. IS0 261 :- 2), IS0 general-purpose metric screw threads - General plan. IS0 3448:1992, Industrial liquid lubricants - IS0 v
38、is- cosity classification. IS0 47591 :1978, Tolerances for fasteners - Part 1: Bolts, screws and nuts with thread diameters be- tween 1,6 (inclusive) and 150 mm (inclusive) and product grades A, B and C. IS0 5598:1985, Fluid power systems and components - Vocabulary. IS0 6508:1986, Metallic material
39、s - Hardness test - Rockwell test (scales A- B - C- D- E - F- G - H - K). IS0 6803:1994, Rubber or plastics hoses and hose assemblies - Hydraulic pressure impulse test with- out flexing. 1) 1 bar = 0.1 MPa = IO5 Pa; 1 MPa = 1 N/mm* 2) To be published. (Revision of IS0 261 :1973) 1 STD-BSI BS EN IS0
40、7774-3-ENGL 2000 111 Lb2qbbS OBb3L25 755 = EN IS0 9974-3:2000 3 Definitions For the purposes of this part of IS0 9974, the defi- nitions given in IS0 5598 apply. 4 Dimensions Stud ends shall conform to the dimensions shown in figure 1 and given in table 1. Hex tolerances across flats shall be in acc
41、ordance with IS0 47591, product grade C. 5 Requirements 5.1 Working pressure Stud ends made of low carbon steel shall be designed for use at the working pressures given in table 2. 5.2 Performance Stud ends made of low carbon steel shall meet at least the burst and impulse pressures given in table 2
42、, when tested in accordance with clause 7. 6 Metal-to-metal sealing The machined seal edge is compressed during as- sembly. This causes damage to the sealing face of the port. Safe reassembly is not possible. A high surface pressure shall also be obtained, otherwise leakage is possible. 7 Test metho
43、ds Parts used for the cyclic endurance or burst test shall not be tested further, used or returned to stock. 7.1 Burst pressure test 7.1.1 Principle Test three samples to confirm that stud ends in ac- cordance with this part of IS0 9974 meet or exceed a ratio of 4:l between the relevant burst and wo
44、rking pressures. 7.1.2 Materials Test blocks shall be unplated and hardened to 45 HRC to 50 HRC (see IS0 6508). Stud ends shall be made from low carbon steel and plated. 7.1.3 Procedure 7.1.3.1 Thread lubrication For testing only, threads and contact surfaces shall be lubricated with hydraulic oil w
45、ith a viscosity of VG 32 in accordance with IS0 3448 prior to the application of torque. 7.1.3.2 Stud end torque Test stud ends after application of the torques given in table 3. 7.1.3.3 Pressure rise rate During the burst test, the rate of pressure rise shall not exceed 138 MPa/min (1 380 bar/min).
46、 7.1.4 Test report Test results and conditions shall be reported on the test data form given in annex A. 7.2 Cyclic endurance (impulse) test 7.2.1 Principle Test six samples at their respective impulse press- ures. 7.2.2 Materials Use the same materials as those given in 7.1 2. 7.2.3 Procedures 7.2.
47、3.1 Thread lubrication Apply lubricant as specified in 7.1.3.1 7.2.3.2 Stud end torques Apply torque as specified in 7.1.3.2. 7.2.3.3 Cycle and pressure rise rate The cycle rate shall be uniform between 0.5 Hz and 1.3 Hz and shall conform to the wave pattern shown in IS0 6803, except that the pressu
48、re rise rate shall be adjusted accordingly. 2 STD=BSI BS EN IS0 9974-3-ENGL 2000 M 1624669 0863126 691 m EN IS0 9974-32000 Surface roughness in micrometres Pitch diameter flats) Figure 1 - Stud end with metal-to-metal sealing (type B) Table 1 - Dimensions of stud ends with metal-to-metal sealing (ty
49、pe B) Dimensions in millimetres M8x1 MlOxl M12 x 1,5 M14 x 1,5 M16 x 1.5 M18x 1.5 M20x 1,531 M22 x 1,5 M26 x 1,5 M27 x 2 M33 x 2 M42 x 2 M48 x 2 1) Maximum nominal diameter Ls iom.1 - - 4 6 7 9 11 - 14 18 - 23 30 36 - d5 ies to1.2) - +0,18 O +0.18 O + 0.22 O + 022 O + 027 O - + 0,27 O + 0.27 O - + 0.33 O + 0.33 O + 0.39 O - S! iom.1 - - - 4 5 7 8 10 12 - 16 20 25 32 - ries tO1.21 - - - + 0.18 O + 0.18 O + 0.22 O + 0.22 O + 0,22 O + 0.27 O - + 0.27 O + 0,33 O + 0.33 O + 0.39 O - - d9 O - 0.2 12 14 17 19 21 23 25 27 31 32 39
