NF ISO 13363, T47-249 (07/2023)

This International Standard specifies requirements for three types and two classes of pipes. The pipes are intended for use in wet exhaust systems of marine engines (where exhaust gases are mixed with cooling water). It does not apply to outboard motors/boats for personal use. The three types are: — type 1: a flexible hose, made of oil-resistant material, with synthetic fabric reinforcement; — type 2: a rigid pipe, made of oil-resistant material, with a synthetic fabric reinforcement in which a helical wire is embedded; — type 3: a pipe or tube (flexible fitting), of oil-resistant material, with or without reinforcement or coating, intended for use in short lengths in locations where the fitting is protected against mechanical damage. The two classes are: — class A: intended for diesel engines; — class B: intended for gasoline engines and diesel engines with a very high exhaust temperature.
(Automatic translation from French)