4127/1 (OSI) Intemational Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION+MEXAYHAPOAHAR OPFAHM3AUMR NO CTAHAAPTM3AUWM+ORGANISATION INTE RNATIONALE DE NORMALISATION Shipbuilding-Inlandnavigation-Fairleads Part1:Two-lipfairleads Construction navale-Navigation interieure-Chaumards -Partie1:Chaumards a deux levres First edition 1979-07-01 ISO 4127/1-1979 (E) UDC629.122.014.24 Ref.No.1SO4127/1-1979(E) Descriptors : shipbuilding, inland navigation, fair leads, specifications, equipment specifications, dimensions Price based on 2 pages Foreword iSO (the International Organization for Standardization) is a worldwide federation of national standards institutes (ISO member bodies). The work of developing Interna- tional Standards is carried out through ISO technical committees. Every member body interested in a subject for which a technical committee has been set up has the right to be representedon that committee.International organizations,governmental and non- governmental, in liaison with iSO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. International Standard ISO 4127/1was developed byTechnical Committee ISO/TC 8, Shipbuilding, and was circulated to the member bodies in June 1977. It has been approved by the member bodics of the following countries : Austria Greece Netherlands Belgium India Poland Brazil Ireland Romania Bulgaria Italy Spain Czechoslovakia Japan Turkey Finland Korea, Dem.P.Rep. of United Kingdom France Korea, Rep. of USSR Germany, F.R. Mexico Nomemberbodyexpresseddisapproval ofthedocument. International Organization for Standardization,1979 ? . Printed in Switzerland ISO4127/1-1979 (E) INTERNATIONALSTANDARD Shipbuilding - Inland navigation - Fairleads Part 1 : Two-lip fairleads Scopeandfieldofapplication 3.2 The basic dimensions and properties specified in this International Standard correspond to the following seven This International Standard specifies the design, sizes, basic loads : 25, 40, 63, 100, 160, 250, 400 kN. parameters and technical requirements of cast two-lip fairleads for inland vessels. 4 Technical requirements 4.1 These fairleads shall withstand, without damage and 2 Reference plastic deformation, the breaking load of a steel wire rope as in- dicated in the table. ISO2408， Steel wireropes for general purposes Characteristics. 4.2 Fairleads of this type shall be fabricated from weldable cast steel having a yield point of not less than 22 × 104 kN/m2 (22 kgf/mm2). Design 3 4.3 Finish : 3.1The design of two-lip fairleads shall be as shown in the annealed and cleaned (sand-blasted) casting. figure.