4127/2 (ISO International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION·MEKAYHAPOAHAR OPTAHM3ALMA NO CTAHAAPTM3ALMM-ORGANISATION INTERNATIONALEDE NORMALISATION Shipbuilding - Inland vessels - Fairleads Part 2 : Roller fairleads Construction navale - Bateaux de navigation intérieure -- Chaumards -- Partie 2 : Chaumards a rouleaux First edition -- 1980-06-15 UDC 621.122.014.24 Ref. No. ISO 4127/2-1980 (E) SO 4127/2-1980 Descriptors : shipbuilding, inland navigation, fairleaders, specifications, dimensions. Price based on 3 pages Not for Resale without license from IHS Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards institutes (Iso member bodies). The work of developing Inter- national 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 represented on 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 4127/2 was developed by Technical Committee ISO/TC 8, Shipbuilding, and was circulated to the member bodies in November 1978. It has been approved by the member bodies of the following countries : Australia France Poland Austria India Romania Belgium Ireland Turkey Bulgaria Italy United Kingdom Chile Japan USSR China Korea, Dem. P. Rep. of Yugoslavia Czechoslovakia Korea, Rep. of The member body of the following country expressed disapproval of the document on technical grounds : Germany, F.R. @ International Organization for Standardization, 1980 Printed in Switzerland Copyright International Organization for Standardization Not for Resale without license from IHS ISO 4127/2-1980 (E) INTERNATIONAL STANDARD Shipbuilding - Inland vessels - Fairleads Part 2 : Roller fairleads 1 Scope and field of application 3.2 The maximum loading values are given in the tables of dimensions. In compliance with the nominal sizes, the max- This International Standard specifies the types, kinds, basic imum diameter of steel and fibre rope is given. The basic parameters of and technical requirements for roller fairleads for loadings are : 75, 125, 220 kN. inland vessels. Classification Materials The following materials shall be used'for manufacturing the 2.1Types fairleads : This International Standard specifies the two following types of Body : weldable steel having a yield point of fairleads : 25 × 104 kN /m2 (25 kgf/mm2). Z : common roller fairlead Roller : cast steel, or malleable cast iron having a yield point of 24 × 104 kN/m2 (24 kgf /mm2). R : fairlead with a collapsible roller Bolt and axle : steel having a yield point of 36 × 104 2.2 Method of securing kN/m2 (36 kgf /mm2). This InternationaL Standard specifies two methods of securing Bush : bronze. roller fairleads : P : for bolting (see left hand side of figures 1 and 2); 5 Construction S : for welding (see right hand side of figures 1 and 2). The construction of roller fairleads and the method of welding 2.3 Nominal sizes parts shall be in accordance with the provisions of this Interna- tional Standard. The nominal diameter of a roller is the nominal size of roller fairleads, in millimetres. The nominal sizes are as follows : Finish Type Z : 80, 100, 150 6.1 The body shall be welded, with blunted edges and polished welds. Type R : 80, 100, 125, 150 6.2 The rollers shall be cleaned castings, with smooth work- Dimensions and loading 3 ing surfaces. 3.1 The main dimensions and loadings of a roller fairlead are 6.3 The bolt and socket shall be manufactured according to given in the figures and tables 1 and 2. national standards. L Copyright International Organization for Standardization Not for Resale No reproduction o