Process for the conditioning of hose or tubing with a high resistance to pressure and fatigue.

摘要

The invention relates to a process for conditioning a plastic high pressure hose comprising in its wall at least one reinforcing layer consisting of steel wires or cords in which the reinforced hose is internally pressurized after its construction during a certain time interval which pressure is released afterwards and wherein, due to this temporary application of internal pressure, the wires, cords or longitudinal segments thereof in the inner reinforcing layer or layers in the hose receive a residual permanent elongation of at least 0.5% and whereby the interior volume of the hose is increased by at least 2% after release of said pressure. High pressure hose conditioned in this manner are also covered. The steel wires or cords incorporated in the hoses can have a tensile strength of between about 2.100 and 3.100 N/mm<2>.