SIST EN ISO 9974-2:2001

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Leitungsanschlüsse für Fluidtechnik und allgemeine Anwendung - Einschraublöcher und Einschraubzapfen mit Gewinde nach ISO 261 und Elastomerdichtung oder metallener Dichtkante - Teil 2: Einschraubzapfen mit Elastomerdichtung (Typ E) (ISO 9974-2:1996)Raccordements pour applications générales et transmissions hydrauliques et pneumatiques - Orifices et éléments mâles a filetage ISO 261 et joints en élastomere ou étanchéité métal sur métal - Partie 2: Eléments mâles avec joint en élastomere (type E) (ISO 9974-2:1996)Connections for general use and fluid power - Ports and stud ends with ISO 261 threads with elastomeric or metal-to-metal sealing - Part 2: Stud ends with elastomeric sealing (type E) (ISO 9974-2:1996)23.100.60Filters, seals and contamination of fluidsICS:Ta slovenski standard je istoveten z:EN ISO 9974-2:2000SIST EN ISO 9974-2:2001en01-november-2001SIST EN ISO 9974-2:2001SLOVENSKI
STANDARD



SIST EN ISO 9974-2:2001



SIST EN ISO 9974-2:2001



SIST EN ISO 9974-2:2001



SIST EN ISO 9974-2:2001



SIST EN ISO 9974-2:2001



INTERNATIONAL STANDARD IS0 99742 First edition 1996-04-I 5 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) Raccordements pour applications g&&ales et transmissions hydrauliques et pneuma tiques - Orifices et &men ts msles ci filetage IS0 26 7 et joint en klastom&-e ou &anch&itG m&al sur m&al - Partie 2: t%ments msles avec joint en Glastombe (type E) Reference number IS0 99742:1996(E) SIST EN ISO 9974-2:2001



IS0 9974-M 996(E) Foreword IS0 (the International Organization for eration of national standards bodies preparing International Standards is technical committees. Each membe Standardization) is a worldwide fed- IS0 member bodies). The work of normally carried out through IS0 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 with the International Electrotechnical Commission (I EC) 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. International Standard IS0 9974-Z was prepared jointly by Technical Committees ISOnC 5, ferrous metal pipes and metallic fittings, Sub- committee SC 5, Threaded or plain end butt-welding fittings, threads, gauging.of threads, and lSO/TC 131, Fluid power systems, 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 261 threads with e/as tomeric or metal-to-metal sealing. - Part 7: Threaded ports - Part 2: Stud ends with elastomeric sealing (type E) - Part 3: Stud ends with metal-to-metal sealing (type B) The performance requirements, dimensions and designs are defined for port and stud end connections for the L and S series in IS0 9974-Z 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 IS0 9974-Z and 9974-3 are identical to those conforming to DIN 3852-1. IS0 9974-Z stud ends are used on IS0 8434-l and IS0 8434-4 fittings, and IS0 9974-3 stud ends are used on IS0 8434-l fittings. Annex A forms an integral part of this part of IS0 9974. Annex B is for information only. 0 IS0 1996 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Orga nization for Standardi zation Case Postale 56 l CH-121 1G eneve 20 l Switzerland Printed in Switzerland II SIST EN ISO 9974-2:2001



@ IS0 IS0 9974-2: 1996(E) 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 threaded ports by stud ends on fluid conductor fittings to tubes and pipes or to hose fittings and hoses. . . . III SIST EN ISO 9974-2:2001



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INTERNATIONAL STANDARD @ IS0 IS0 9974-2: 1996(E) 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 (S series) and light-duty (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 be used at working pressures up to 63 MPa (630 bar I)). Light- duty (L series) stud ends with type E sealing in accor- dance with this part of IS0 9974 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 conditions, application, etc. For threaded ports and stud ends specified in new designs in hydraulic fluid power applications, only IS0 6149 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 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. 2 Normative references The following standards 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 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 (hardness between 70 IRHD and 100 IRHD). IS0 261:- 21, IS0 general-purpose metric screw threads - General plan. IS0 3448: 1992, Industrial liquid lubricants - IS0 vis- cosity classification. IS0 4759-l :I 978, Tolerances for fasteners - Part 7: Bolts, screws and nuts with thread diameters be- tween I, 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 materials - 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- 0 u t flexing. 1) 1 bar = 0,l MPa = 105 Pa; 1 MPa = 1 N/mm* 2) To be published. (Revision of IS0 261:1973) 1 SIST EN ISO 9974-2:2001



IS0 9974-2: 1996(E) 3 Definitions 0 IS0 7.12 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 accordance with IS0 4759-1, 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, when tested in accordance with clause 7. 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 (NBR) rubber with a hardness of (90 t 5) IRHD when measured in accordance with IS0 48. Test seals shall conform to the dimensions given in table 3. 7.1.3 Procedure 7.1.3.1 Thread lubrication For testing only, threads and contact surfaces shall be lubricated with hydraulic oil with 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 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 Elastomeric 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 endurance or burst test shall not be tested further, used or returned to stock. 7.1 Burst pressure test 7.1 .I 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 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 lubrication Apply lubricant as specified in 7.1.3.1. 2 SIST EN ISO 9974-2:2001



X IS0 9974-2: 1996(E) Dimensions in millimetres, surface roughness in micrometres Break 0,os l-l R 0,2 R2 s (width across flats) I- Figure I - 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 65 d6 d7 d8 L4 L5 L6 L7 RI R2 S W Thread Ml x PI L series S series nom?) tol.2) nom?) +Ol tot?) 42 0' (2 + 0,3 I I +0,2 min. 0 +y +0,1 +0,1 MlOxl 4 + 0,18 0 13,9 12 8,3 8 I,5 2 0,7 1 0,5 14 Ml2 x1,5 6 + 0,18 4 + 0,18 0 0 16,9 14,5 9,7 12 2 3 I,2 I,2 0,5 17 M14xl,5 7 + 0,22 0 5 +0,18 0 18,9 16,6 II,7 12 2 3 I,2 I,2 0,5 19 M16x1,5 9 + 0,22 + 0,22 0 7 0 21,9 19 13,7 12 2 3 I,2 I,2 0,5 22 0,l M18x1,5 11 + 0,27 8 + 0,22 0 0 23,9 21 15,7 12 2,5 3 I,2 I,2 0,6 24 MZOxl,53) + 0,22 - - 10 0 25,9 23 17,7 14 2,5 3 I,2 I,2 0,6 27 M22x1,5 14 + 0 0,27 12 + 0,27 0 26,9 24,5 19,7 14 3 3 I,2 I,2 0,6 27 M26xl,5 18 + 0,27 0 31,9 29,3 23,8 16 3 3 I,2 I,2 0,6 32 M27x2 - 16 + 0,27 - 0 31,9 29,3 23,8 16 3
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