This International Standard specifies requirements for two classes and three types of rubber steam hoses as follows :
a) Classes :
— class I : non-otl-resistant cover,
— class II : oil-resistant cover;
b) Types :
— type 1 : intended for a maximum working steam pressure of 0,6 MPa (6 bar) corresponding to a temperature of 165 °C,
— type 2: intended for a maximum working steam pressure of 1,0 MPa (10 bar) corresponding to a temperature of 184 °C,
— type 3: intended for a maximum working steam pressure of 1,6 MPa (16 bar) corresponding to a temperature of 204 °C.
Hoses complying with the requirements of this International Standard are not suitable for use in the preparation of foodstuffs, for example by steam cooking, or for special service applications, such as in pile drivers, etc.
NOTE — The end fittings used with the hose should be of a type which will permit compensation for creep of the rubber compounds during service.