This International Standard specifies requirements for three types and two classes of hose. The hoses are intended for use in marine-engine wet-exhaust systems (where the exhaust gases are mixed with the discharge of cooling water).
The three types are:
— type 1: a softwall hose, made of oil-resistant material, with a synthetic-fabric reinforcement;
— type 2: a hardwall hose, made of oil-resistant material, with a synthetic-fabric reinforcement with a helical wire embedded in it;
— type 3: a hose or tube (flexible connector), made of oil-resistant material, with or without a reinforcement or cover, intended for use in short lengths in locations where the connector is protected from mechanical damage.
The two classes are:
— class A intended for diesel engines;
— class B intended for petrol engines, and for diesel engines with a very high exhaust temperature.