1、STD-BSI BS EN IS0 9974-2-ENGL 2000 E 3624b69 0863728 95T 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 2: Stud ends with elastomeric sealing (type E) The European Standard EN IS0 997422000 has
2、 the status of a British Standard ICs 23.100.60 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGEPT LAW BS EN IS0 9974-2:2000 National foreword been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Conunittee and com
3、es into effect on 15 August 2000 Amd. No. Q BSI 082O ISBN O 580 36270 1 This British Standard is the official English language version of EN IS0 99742:2000. It is identical with Is0 997421996. The UK participation in its preparation was entrusted to Technid Committee MW18, Fluid power systems and co
4、mponents, which has the responsibility to: Date Comments - aid enquirers to undentand the text; - present to the responsible internationallEuropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; - monitor related international and European
5、 developments and promulgate themintheuK. A list of organizations represented on this committee can be obtained on request to its secrem. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists nonnative references to international publica
6、tions with their corresponding European publications. The British Stan- which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitied “International Standards Correspondence Index“, or by using the “Find“ facility of the BSI Stand
7、ards Electronic Catalogue. A British Standard does not purport to include ail 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 pag
8、es This doment comprises a front cover, an inside front cover, the EN IS0 title page, the EN Is0 foreword page, the IS0 titie page, paga ii and iii, a blank page, pages 1 to 9 and a back cover. The BSI copyright notice displayed in this document indicates when the document waslastissued. STD.BSI BS
9、EN IS0 9974-2-ENGL 2000 H Lb24bb OBb3730 508 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS0 9974-2 May 2000 ICs 23.1 00.30 English version Connections for general use and fluid power - Ports and stud ends with IS0 261 threads with elastomeric or metal-to-metal sealing - Part 2: Stud ends w
10、ith elastomeric sealing (type E) (IS0 9974-2: 1 996) Raccordements pour applications gnrales et transmissions hydrauliques et pneumatiques - Orifices et lments mles filetage IS0 261 et joints en lastomre ou tanchit mtal sur mtal - Partie 2; Elments mles avec joint en Blastomre (type E) (IC0 9974-2:1
11、996) Leitungsanschlsse fur fluidtechnik und allgemeine Anwendung - Einschraublcher und Einschraubzapfen mit Gewinde nach IS0 261 und Elastomerdkhtung oder metallener Dichtkante - Teil 2 Einschraubzapfen mit Elastomerdichtung (Typ E) (IS0 9974-2:1996) This European Standard was approved by CEN on 8 A
12、pril 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-to-date lists and bibliographical references concerning such national standards may be obta
13、ined on application to the Central Secretariat or to any CEN member. This European Standard exists in three oicial versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Centrai Secret
14、ariat 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, Switzerland and United Kingdom. EUROPEA
15、N COMMiTEE FOR STANDARDIZATION COMITE EUROPEEN DE NORMALISATION EUROPISCHES KOMITEE FOR NORMUNG Central Secretariat: rue de Stassart, 36 B-1 O50 Brussels CD 2000 CEN All rights of exploitation in any form and by any means resewed worldwide for CEN national Members. Ref. No. EN IS0 9974-2:2000 E Fore
16、word 1 The text of the International Standard from Technical Committee ISORC 5 Ferrous metal pipes and metallic fittings“ and ISO/TC 131 “Fluid power systems“ of the International Organization for Standardization (ISO) has been taken over as an European Standard by Technical Committee ECISSTTC 29 “S
17、teel 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 endorsement, at the latest by November 2000, and conflicting national standards shall be withdr
18、awn 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 Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, L
19、uxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard IS0 9974-2:1996 has been approved by CEN as a European Standard without any modification. NOTE: Normative references to International Standards are l
20、isted in annex ZA (normative). STD-BSI BS EN IS0 9974-2-ENGL 2000 Lb2Ybb9 08b3732 380 EN IS0 9974-2:2000 INTERNATIONAL STANDARD IS0 9974-2 First edition 1996-04-1 5 Connections for general use and fluid power - Ports and stud ends with IS0 261 threads with elastomeric or metal-to-metal sealing - Par
21、t 2: Stud ends with elastomeric sealing (type E) Raccordements pour applications gnrales et transmissions hydrauliques et pneumatiques - Orifices et lments mles filetage IS0 267 et joint en lastomre ou tanchit mtal sur mtal - Partie 2: Elments mles avec joint en lastomre (type .E) Reference number I
22、S0 9974-2:1996(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 committees. Each member body interested in a s
23、ubject for which a technical committee has been established has the right to be rep- resented on that committee. International organizations, governmental and nongovernmental, in liaison with EO, also take part in the work. IS0 col- laborates closely with the International Electrotechnical Commissio
24、n (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 % of the member bodies casting a vote. Internation
25、al Standard IS0 9974-2 was prepared jointly by Technical Committees lSO/TC 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, Fluid power systems, Subcommittee SC 4, Connectors and similar produc
26、ts 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 261 threads with elastomeric or metal-to-metal sealing. - Part 7: Threadedports - - The performance requirements, dimensions and designs a
27、re 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 30 years of use has confirmed the performance requirements of these port and stud end connections. Stud ends conforming to ISO9974-2 and
28、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 for information only. Part 2: Stud ends with elas
29、tomeric sealing (type E) Part 3: Stud ends with metal-temetal sealing (type BI I STDOBSI BS EN IS0 9974-2-ENGL 2000 II Lb24669 0863734 153 = EN IS0 9974-2:2000 Introduction In fluid power systems, power is transmitted and controlled through a fluid (liquid or gas) under pressure within an enclosed c
30、ircuit. In general appli- cations, 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 9974-2-ENGL ZOO0 E 1624669 0863735 09T EN IS0 9974-2:200
31、0 Connections for general use and fluid power - Ports and stud ends with IS0 261 threads with elastomeric or metal-to-metal sealing - Part 2: Stud ends with elastomeric sealing (type E) 1 Scope This part of IS0 9974 specifies dimensions, perform- ance requirements and test procedures for heavy-duty
32、(S series) and lightduty (L series) stud ends with IS0 261 threads and the elastomeric sealing that is used with them. It also specifies the designation of these stud ends and their elastomeric sealing. Heavy-duty (S series) stud ends with type E sealing in accordance with this part of IS0 9974 may
33、be used at working pressures up to 63 MPa (630 bar 1). Light- duty (L series) stud ends with type E sealing in accor- dance with this part of IS09974 may be used at working pressures up to 25 MPa (250 bar). The permiss- ible working pressure depends upon the stud end size, materials, design, working
34、 conditions, application, etc. 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 app
35、lications. Conformance to the 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. this part o
36、f 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 IS0 9974 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of I
37、EC and IS0 maintain registers of currently valid International Stan- dards. IS0 48:1994, Rubber, vulcanized or thermoplastic - Determination of hardness (hardness between 70 IRHD and i00 IRHD). IS0 261 :- *I, IS0 general-purpose metric screw threads - General plan. IS0 3448: 1992, Industrial liquid
38、lubricants - IS0 vis- cosity classification. IS0 47591:1978, Tolerances for fasteners - Part 1: Bolts, screws and nuts with thread diameters be- tween 7,6 (inclusive) and 150mm (inclusive) and product grades A, B and C. IS0 5598:1985, Fluid power systems and components - Vocabulary. IS0 6508: 1 986,
39、 Metallic materials - Hardness test - Rockwell test (scales A - 8 - C- D- E - F- G - H - KI. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of IS0 6803:1994, Rubber or plastics hoses and hose assemblies - Hydraulic press
40、ure impulse test with- out flexing. 1) 1 bar = 0.1 MPa = 105 Pa; 1 MPa = 1 N/mmz 2) To be published. (Revision of IS0 261 :1973) 1 STD-BSI BS EN IS0 9974-2-ENGL 2000 O lb24bb9 OBb373b T2b EN IS0 9974-2:2000 3 Definitions 7.1.2 Materials For the mwoses of this part of IS0 9974, the defi- 7.1.2.1 Test
41、 block and stud ends nitions given in IS0 5598 apply. I Test blocks shall be unplated and hardened to 50 HRC to 55 HRC (see IS0 6508). Stud ends shall be made from low carbon steel and plated. 4 Dimensions 7.1.2.2 Test seals Stud ends shall conform to the dimensions shown in figure 1 and given in ta
42、ble 1. Hex tolerances across flats shall be in accordance with IS0 4759-1, product grade C. Unless otherwise specified, test seals shall be made from nitrile (NBR) rubber with a hardness of (90 f 5) IRHD when measured in accordance with 6048. Test seals shall conform to the dimensions given in table
43、 3. 5 Requirements 7.1.3 Procedure 7.1.3.1 Thread lubrication 5.1 Working pressure Stud ends made of low carbon steel shall be designed for use at the working pressures given in table 2. For testing only, threads and contact surfaces shall be lubricated with hydraulic oil with a viscosity of VG 32 i
44、n 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 4. 7.1.3.3 Pressure rise rate 5.2 Performance Stud ends made of low carbon steel shall meet at least the burst and impulse pressures given in table 2,
45、 when tested in accordance with clause 7. During the burst test, the rate of pressure rise shall not exceed 138 MPa/min (1 380 bar/min). 6 Elastomeric seals Elastomeric seals for use with both heavy-duty (S series) and lightduty (L series) stud ends in accor- dance with this part of is0 9974 shall c
46、onform to the dimensions shown in figure 2 and given in table 3. Figure 3 shows the correct installation of the seal. 7.1.4 Test report Test results and conditions shall be reported On the test data form given in annex * 7.2 Cyclic endurance (impulse) test 7 Testmethods 7.2.1 Principle Parts used fo
47、r the cyclic endurance or burst test shall not be tested further, used or returned to stock. Test six samples at their respective impulse pressures. 7.2.2 Materials 7.1 Burst pressure test Use the same materials as those given in 7.1.2. 7.1.1 Principle 7.2.3 Procedure Test three samples to confirm t
48、hat stud ends in ac- cordance with this part of IS0 9974 meet or exceed a ratio of 4:l between the relevant burst and working pressures. 7.2.3.1 Thread lubrication Apply lubricant as specified in 7.1.3.1. 2 STD.BSI BS EN IS0 9974-2-ENGL 2000 m Lb2Libb9 08b3737 9b2 EN IS0 9974-2:2000 Dimensions in mi
49、llimetres. surface roughness in micrometres X R 0.2 R2 I flats) X Y 1 ad? Figure 1 - Light-duty L series) and heavy-duty (S series) stud end with elastomeric sealing (type E) Table 1 - Dimensions of light-duty (L series) and heavy-duty (S series) stud ends with elastomeric sealing (type E) Dimensions in millimetres MI0 x 1 MI2 x 1.5 M14x 1,5 M16x1.5 M18 x 1.5 M20 x 1,53) M22 x 1,5 M26 x 1,5 M27 x 2 M33 x 2 M42 x 2 M48 x 2 La nom.11 4 6 7 - 9 11 - 14 18 - 23 30 36 - 10s to1.2) + 0,18 O +0.18 O + 0.22 O - + 0.22 O + 0.27 O - + 0,27 O +
