This document specifies requirements for two types@ seven classes and three grades of wire- or textilereinforced dredging hoses with nominal sizes ranging from 100 to 1 200. Within each class@ all grades and sizes have the same maximum working pressure. Such hoses are suitable for the delivery or suction of seawater or freshwater mixed with silt@ sand@ coral and small stones with a specific gravity in the range from 1@0 to 2@3 at ambient temperatures ranging from ?10 ??to +40 ?? This document covers two types of hose@ as follows: ?? type 1: floating type@ for delivery only@ which includes flotation material to give the hose buoyancy; ?? type 2: submarine type for delivery and suction. This document does not specify requirements concerning the service life of hoses or hose assemblies. Specifying such requirements is the responsibility of the customer@ in consultation with the hose manufacturer.