6454 (ISO nternational Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION·MEKAYHAPOAHAA OPFAHW3ALWA HO CTAHAAPTW3AMWORGANISATION INTERNATIONALE DE NORMALISATION Shipbuilding - Strum boxes Construction navale - Crepines d'aspiration dans les cales First edition 1984-12-01 UDC 629.12.011.56 Ref.No. 1SO 6454-1984 (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 least 75 % approval by the member bodies voting. International Standard ISO 6454 was prepared by Technical Committee ISO/TC 8, Shipbuilding and marine structures. InternationalOrganizationforStandardization,1984 Printed inSwitzerland ISO 6454-1984 (E) INTERNATIONALSTANDARD Shipbuilding - Strum boxes Scope and field of application 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. Types of strum box 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- andaperforatedtopplate. sure compliance with such statutory requirements, rules and regu- lations as may be applicable to the individual ship concerned. Type S2 : Square box, with perforated sides and a non- perforated top plate. References Type S3 : Square box, with perforated sides and a perforated Iso 1461, Metallic coatings - Hot dip galvanized coatings on top plate. fabricatedferrousproducts-Requirements. Iso 4200, Plain end steel tubes, welded and seamless NOTES General tables of dimensions and masses per unit length. The code used for indicating the type of strum box comprises a 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 Definition 3 6.2). For the purpose of this International Standard, the following Where the strum box is provided with a base which is perforated, 2 this area shall be disregarded for the purposes of clause 6. definitionis applicable :