GOST 18698-79

Work environment: 

· Class B (1) - benzine, kerosene, oils;

· Class W (II) - technical water, solutions of non-organic acids and alkalis with concentration up to 20% (except nitric);

· Class WH (III) - hot water is up to +100°C;

· Class G (IV) - air, carbonic gas, nitrogen, noble gases;

· Class P (VII) - for delivering eatables;

· Class Sh (VIII) - for delivering weak alkali and weak acid solutions for plastering and house-painting;

· Class Par-1 (X) - for delivering saturated steam with temperature up to +143°C;

· Class Par-2 (X) - for delivering saturated steam with temperature up to +175°C.

Work pressure is up to 1,0 MPa (10 kgf/cm2): 

· Class Par-1 (X) -0,3 P;

· Class Par-2 ()-0,8 P.

Inside diameter is from 16 to 50 mm, 160 mm.

Efficiency Temperature: 

· Class B (I) from -35°C up to +70;

· Class W (II ) and P( VII) up to +50;

· Class (III) up to +100;

· Class G(IV) Sh(VIII) from -35°C up to +50;

· Class Par-1 (X) up to +143;

· Class Par-2 (X) up to +175;

Length is up to 20 m for hoses with inside diameter from 16 to 50 mm and 6 m for hoses with inside diameter of 160mm.