BS EN ISO 9974-3:2000 PDF

Scope: This part of ISO 9974 specifies dimensions, perform-ance requirements and test procedures for heavy-duty (S series), light-duty (L series) and extra-light-duty (LL series) stud ends with ISO 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 accordance with this part of ISO 9974 may be used at working pressures up to 10MPa (100 bar ) 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, etc. For threaded ports and stud ends specified in new designs in hydraulic fluid power applications, only ISO 6149 is to be used. Threaded ports and stud ends in accordance with ISO 1179, ISO 9974 and ISO 11926 are not to be used for new designs in hydraulic fluid power applications. Conformance to the dimensional information in this part of ISO 9974 does not guarantee rated perform-ance. Each manufacturer should perform testing according to the specification contained in this part of ISO 9974 to assure that components comply with the performance ratings. note:1) 1 bar = 0,1 MPa = 10 Pa; 1 MPa = 1 N/mm<>up2

BS EN ISO 9974-3:2000 history

2000 BS EN ISO 9974-3:2000 Connections for general use and fluid power - Ports and stud ends with ISO 261 threads with elastomeric or metal-to-metal sealing - Stud ends with metal-to-metal sealing (type B)