1、DEUTSCHE NORM SeDtember 2000 Connections for general use and fluid power Ports and stud ends with IS0 261 threads with elastomeric or Part 2: Stud ends with elastomeric sealing (type E) (IS0 9974-2 : 1996) English version of DIN EN IS0 9974-2 metal-to-metal sealing DIN - EN Is0 9974-2 ICs 23.100.60
2、Leitungsanschlsse fr Fluidtechnik und allgemeine Anwendung - Einschraublcher und Einschraubzapfen mit Gewinde nach IS0 261 und Elastomerdichtung oder metallener Dichtkante - Teil 2: Einschraubzapfen mit Elastomerdichtung (Typ E) (IS0 9974-2 : 1996) European Standard EN IS0 9974-2 : 2000 has the stat
3、us of a DIN Standard. A comma is used as the decimal marker. National foreword This standard has been published in accordance with a decision taken by ECISS/TC 29 to adopt, without alteration, International Standard IS0 9974-2 as a European Standard. The responsible German body involved in its prepa
4、ration was the Normenausschuss Rohrverschraubungen (Pipe Joints Standards Committee). The DIN Standards corresponding to the International Standards referred to in clause 2 of the EN are as follows: IS0 48 DIN IS0 48 IS0 261 IS0 3448 DIN 51519 IS0 6508 IS0 6803 Supplement to DIN 13-12 IS0 4759-1 DIN
5、 IS0 4759-1 DIN 501 03-1 and DIN EN 10004-1 *) DIN EN IS0 6803 National Annex NA Standards referred to (and not included in Normative references and Annex ZA) Supplement to DIN 13-1 2 IS0 metric screw threads - Coarse and fine pitch threads with diameters from 1 mm to 300 mm - General plan of the sc
6、rew threads according to IS0 261 : 1973 Rockwell hardness testing of metallic materials - C, A, B, F scales IS0 viscosity classification for industrial liquid lubricants Metallic materials - Hardness test - Rockwell (scales A, B, C, D, E, F, G, H, K)*) Rubber or plastics hoses and hose assemblies -
7、Hydraulic-pressure impulse test without flexing (IS0 6803 : 1994) DIN 501 03-1 DIN 51 51 9 DIN EN 10004-1 DIN EN IS0 6803 *) Currently at draft stage. EN comprises 11 pages. No pari of this standard may be reproduced without the prior permission of Ref. No. DIN EN IS0 9974-2 : 2000-0 Y Deutsches Ins
8、titut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany, s the exclusive right of sale for German Standards (DIN-Normen). English price group 10 Sales No. 11 10 03.01 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS0 9974-2 May 2000 ICs 23.1 00.60 English version Connections
9、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) (IS0 9974-2 : 1996) Raccordements pour applications gnrales et transmissions hydrauli- ques et pneumatiques - Orifices et lments mle
10、s filetage IS0 261 et joint en lastomre ou tanchit mtal sur mtal - Partie 2: Elments mles avec joint en lastomre (type E) (IS0 9974-2 : 1996) Leitungsanschlsse fr Fluidtechnik und allgemeine Anwendung - Ein- schraublcher und Einschraubzapfen mit Gewinde nach IS0 261 und Elastomerdichtung oder metall
11、ener Dichtkante - Teil 2: Einschraubzapfen mit E last o me rd ich t u ng (Typ E) (IS0 9974-2 : 1996) This European Standard was approved by CEN on 2000-04-08. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the
12、 status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national stand- ards may be obtained on application to the Central Secretariat or to any CEN member. The European Standards exist in three official versions (English, French, German
13、). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, the Czech Republic, Denmark,
14、Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart
15、36, B-1050 Brussels O 2000. CEN - All rights of exploitation in any form and by any means reserved worldwide for CEN national members. Ref. No. EN IS0 9974-2 : 2000 E Page 2 EN IS0 9974-2 : 2000 Foreword International Standard IS0 9974-2 : 1996 Connections for general use and fluid power - Ports and
16、 stud ends with IS0 261 threads with elastomeric or metal-to-metal sealing - Part 2: Stud ends with elastomeric sealing which was prepared by ISO/TC 5 Ferrous metal pipes and metallic fittings of the International Organization for Standardization, has been adopted by Technical Committee ECISS/TC 29
17、Steel tubes and fittings for steel tubes, the Secretariat of which is held by UNI, as a European Standard. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, and conflicting national standards withdrawn, by November
18、2000 at the latest. In accordance with the CENKENELEC Internal Regulations, the national standards organizations of the follow- ing countries are bound to implement this European Standard: Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxem
19、bourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. (type E), Endorsement notice The text of the International Standard IS0 9974-2 : 1996 was approved by CEN as a European Standard without any modification. NOTE: Normative references to international publica
20、tions are listed in Annex ZA (normative). 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- cations, a fluid may be conveyed under pressure. Components are connected through their thre
21、aded ports by stud ends on fluid conductor fittings to tubes and pipes or to hose fittings and hoses. Page 3 EN IS0 9974-2 : 2000 1 Scope This part of is0 9974 specifies dimensions, perform- ance requirements and test procedures for heavy-duty (s series) and light-duty (L ends with is0 261 threads a
22、nd the elastomeric sealing that is used with them, it also specifies the designation of these stud ends and their elastomeric sealing. 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
23、part Of Is0 9974 are encouraged to investigate 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 48 1994, Rubber, vulcanized or thermoplastic - Determination of hardness (
24、hardness between 7o IRHD and Heavy-duty (S series) stud ends with type E sealing in accordance with this part of IS0 9974 may be used at working pressures up to 63 MPa (630 bar I). Light- dutv (L series) stud ends with type E sealing in accor- dance with this part of IS09974 may be used at working p
25、ressures up to 25 MPa (250 bar). The permiss- ISO 261 :- 21, /so general-purpose metric screw ible working pressure depends upon the stud end size, materials, design, working conditions, application, etc. For threaded ports and stud ends specified in new designs in hydraulic fluid power applications
26、, only cosity classification. IS0 6149 is to be used. Threaded ports and stud threads - General plan. IS0 3448:1992, Industrial liquid lubricants - IS0 vis- ends in accordance with IS0 1179, IS0 9974 and hydraulic fluid power applications are not to be used for new designs IS0 4759-1.1978, Tolerance
27、s for fasteners - Part 7 Bolts, screws and nuts with thread diameters be- tween 1.6 (inclusive) and 150 mm inclusive) and Conformance to the dimensional information in this Dart of IS0 9974 does not guarantee rated perform- product grades A, B and C. ance. Each manufacturer should perform testing ac
28、cording to the specification contained in this part of IS0 9974 to assure that components comply with the IS0 5598:1985, Fluid power systems and components - performance ratings. IS0 6508:1986, Metallic materials - Hardness test - Rockwell test (scales A- B- C- D- E- F- G - H - K). 2 Normative refer
29、ences IS0 6803:1994, Rubber or plastics hoses and hose The following standards contain provisions which, assemblies - Hydraulic pressure impulse test with- through reference in this text, constitute provisions of out flexing. 1) 1 bar = 0.1 MPa = 105 Pa; 1 MPa = 1 N/mm2 2) To be published. (Revision
30、 of IS0 261 :1973) Page 4 EN IS0 9974-2 : 2000 3 Definitions 7.1.2 Materials 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 ac
31、cordance with IS0 4759-1, product grade C. 7.1.2.1 Test block and stud ends 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. 7.1.2.2 Test seals Unless otherwise specified, test seals shall be made from nitrile (N
32、BR) rubber with a hardness of (90 k 5) IRHD when measured in accordance with ISO48. Test seals shall conform to the dimensions given in table 3. 7.1.3 Procedure 5 Requirements 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
33、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, when tested in accordance with clause 7. For testing only, threads and contact surfaces shall be lubricated with hydraulic oil with a viscosity of VG 3
34、2 in accordance with IS0 3448 prior to the appiication 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 During the burst test, the rate of pressure rise shall not exceed 138 MPa/min (1 380 bar/min). 6 Elastomeric seals El
35、astomeric seals for use with both heavy-duty (S series) and light-duty (L series) stud ends in accor- dance with this part of IS0 9974 shall conform to the dimensions shown in figure 2 and given in table 3. Figure 3 shows the correct installation of the seal. 7 Test methods Parts used for the cyclic
36、 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 working pressures. 7.1.4 Test
37、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 pressures. 7.2.2 Materials Use the same materials as those given in 7.1.2. 7.2.3 Procedure 7.2.3.1 Thread lubr
38、ication Apply lubricant as specified in 7.1.3.1. Page 5 EN IS0 9974-2 : 2000 Dimensions in millimetres, surface roughness in micrometres Ra 2 5 32 Breakcorner - 0.05 mm max. X R 0.2 -0 i L .“ E Pitch diameter d6 l i s (width across -Lm, flats) e Thread id, Y Pi Figure 1 - Light-duty (L series) and h
39、eavy-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 Thread (dl X P) MlOxl M12x 1.5 MI4 x 1.5 M16x 1.5 M18x1,5 M20 x 1.5 3) M22 x 1,5 M26 x 1.5 M27
40、 x 2 M33 x 2 M42 x 2 M48 x 2 L nom. 4 6 7 - 9 11 - 14 18 - 23 30 36 - es to1.2) +O,18 O + 0.18 O + 0.22 O + 0.22 O + 0.27 O - + 0.27 O + 0.27 O - + 0.33 O + 0.33 O + 0.39 O - ss 7orn.l) - 4 5 7 8 10 12 - 16 20 25 32 - es 101.2) - - + 0,18 O + O,18 O + O,22 O + 0,22 O + 0.22 O + 0.27 O - + 0.27 O + 0
41、.33 O + 0.33 O + 0.39 O - d6 O - 0.2 13.9 16.9 18.9 21.9 23,9 25.9 26.9 31.9 31.9 39.9 49.9 54,9 - - d7 + 0.1 O - 12 14.5 16.6 19 21 23 24,5 29,3 29.3 36 46 51 - - d8 O - 0.2 8,3 9.7 11,7 13,7 15.7 17.7 19,7 23,8 23.8 29,6 38.6 44.5 - L4 t 0,2 8 12 12 - 12 12 14 14 16 16 18 20 22 - - r, + 0.3 O 2 3
42、3 - 3 3 3 3 3 4 4 4 4 - - S 14 17 19 22 24 27 27 32 32 41 50 55 - 1 i Maximum nominal diameter 21 Tolerance corresponding to H13 in accordance with IS0 286-2 3) For measurement applications Page 6 EN IS0 9974-2 : 2000 Series L- S NOTE Table 2 - Pressures for light-duty (L series) and heavy-duty (S s
43、eries) stud ends with elastomeric sealing (type E) Working pressure I Test pressure I Thread M Pa MlOx 1 25 M12 x 1.5 25 M14 x 1.5 25 MI6 x 1,5 25 M18 x 1.5 25 M22 x 1.5 16 M26 x 1.5 16 M33 x 2 10 M42 x 2 10 M48 x 2 10 M12 x 1.5 63 M4 x 1.5 63 M16x1.5 63 M18x1.5 63 M20 x 1.5 2) 63 M22 x 1,5 40 M27 x
44、 2 40 M33 x 2 40 M42 x 2 25 M48 x 2 25 -These pressures were established using fittings made of low carbon steel when tested in accordance with clause 7 (bar) (250) (250) (250) (250) Burst M Pa (bar) 1 O0 (1 000) 1 O0 (1 000) 1 O0 (1 000) 1 O0 (1 000) MPa 33,2 33,2 33,2 33,2 (bar) (332) (332) (3321
45、(3321 (250) 1 O0 (630) I 252 I (2 520) 1 83,8 I (838) (i 000) 33.2 (3321 (400) I 160 1 (1 600) I 53.2 1 (532) (1 60) (1 60) (1 00) (1 00) (1 00) (630) (630) (630) (630) (1 600) (532) (400) I I (1 600) I 1 (532) 64 1640) 21,3 (213) 64 (640) 21.3 121 3) 40 (400) 13,3 11 33) 40 (400) 13,3 11 33) 40 (40
46、0) 13,3 (1 33) 252 (2 520) 83.8 (838) 252 (2 520) 83.8 1838) 252 (2 520) 83.8 (838) 252 (2 520) 83,8 (838) (250) (250) 1 1 O0 (1 000) 33.2 (332) 1 O0 (1 000) 33.2 (332) Page 7 EN IS0 9974-2 : 2000 Series / 41 41 Thread N.k Io + 10 Yo Figure 2 - Elastomeric seal for use with light-duty (L series) and
47、 heavy-duty (S series) stud ends L s Table 3 - Dimensions of elastomeric seals for use with light-duty (L series) and heavy-duty (S series) stud ends Dimensions in rnillirnetres M10 x 1 20 M12 x 1.5 30 M14x 1.5 50 M16 x 1.5 60 M18 x 1.5 80 M22 x 1.5 140 M26 x 1.5 200 M33 x 2 380 M42 x 2 500 M48 x 2
48、600 M12 x 1,5 45 M14 x 1.5 60 MI6 x 1.5 80 M18 x 1.5 1 O0 M20 x 1.5 140 M22 x 1.5 150 M27 x 2 200 M33 x 2 380 M42 x 2 500 M48 x 2 600 Thread M10 x 1 M12x1.5 M14x1.5 M16x1.5 M18x1.5 M20 x 1.5 M22 x 1.5 M26 x 1,5 M27 x 2 M33 x 2 M42 x 2 M48 x 2 nom. 8.4 9.8 11.6 13.8 15.7 17.8 19,6 23.9 23,9 29,7 38.8
49、 44.7 - - dl tot. - k 0,2 - k 0,3 - nom. 11.9 14.4 16,5 18,9 20.9 22.9 24.3 29,2 29.2 35.7 45.8 50.7 - - 1 I For measurement applications tol. - k 0.2 i 0.3 - L1 c 0,l - 1 1.5 1.5 1.5 1,5 1.5 1.5 1.5 1.5 2 2 2 Figure 3 - Correct assembly of elastomeric seal on stud end Table 4 - Torques for stud end qualification test I I Torque NOTE - The torque values are for testing only Assembl tightening torque depends on many factors, including lubricatior coatinq and surface finish The manufacturer shall be consulted 7.2.3.2 Stud end torques Apply to
