6454 International Standard (TSO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION+MEKAYHAPOAHAR OPrAHW3ALMR NO CTAHAAPTM3ALWWORGANISATION INTERNATIONALE DE NORMALISATION Shipbuilding - Strum boxes Constriuctinnnavale-Crepinesd'aspiration dans les cales First edition-1984-12-01 UDC 629.12.011.56 Ref.No.1SO6454-1984(E) )6454-1984 (E) Descriptors : shipbuilding,piping,strainers : rose, dimensions. Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (iSO member bodies). The work of preparing International Standards is normally carried out through ISo technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental 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. They are approved in accordance with ISo procedures requiring at International Standard ISO 6454 was prepared by Technical Committee ISO/TC 8, Shipbuilding and marine structures. International Organizationfor Standardization,1984 Printed in Switzerland ISO 6454-1984 (E) INTERNATIONALSTANDARD Shipbuilding - Strum boxes Scopeandfield of application 1 strum box nominal size (DN) : The nominal size of the bilge pipe. This International Standard specifies the major dimensions of strum boxes installed at the end of bilge suction pipes to pre- vent pipe obstruction by solid matter. 4 Typesofstrumbox Strum boxes complying with this International Standard are not acceptable for bilge suction pipes in machinery spaces and Four types of box are specified : shaft tunnels. Type R2 : Cylindrical box, with a perforated cylindrical part This International Standard applies to deep sea ships and inland and a non-perforated top plate. navigation ships. NOTE - Users of this International Standard should note that while Type R3 : Cylindrical box, with a perforated cylindrical part observing the stated requirements, they should at the same time en- and a perforated top plate. sure compliance with such statutory requirements, rules and regu- lations as may be applicable to the individual ship concerned. TypeS2:Squarebox,with perforatedsides andanon- perforated top plate. 2 References Type S3 : Square box, with perforated sides and a perforated Iso1461,Metallic coatings-Hot dipgalvanized coatings on top plate. fabricatedferrousproducts - Requirements Iso4200,Plain end steel tubes,weldedandsearmless NOTES Generaltables of dimensions andmasses perunit length. The code used for indicating the type of strum box comprises a 1 letter for the form of strum box (R : round, S : square) and a number for the minimum ratio of the total hole area to the pipe section (see 3 Definition 6.2), For the purpose of this International Standard, the following Where the strum box is provided with a base which is perforated, 2 definition is applicable : this area shall be disregarded for the purposes of clause 6. 1