CONNECTION OF PIPES PROVIDED WITH INNER ANTICORROSIVE COATS Russian patent published in 2002 - IPC

FIELD: pipe line transport; repair and erection of main pipe lines provided with inner anticorrosive coats; oil, gas, chemical and other industries. SUBSTANCE: mounted inside pipes are connecting bushes with inner anticorrosive coats and circular bores on outer surface for placing heat-insulating material which are provided with radial thrust projections in center section. Outer surface of end section of bushes have circular grooves with sealing members and inner surfaces of opposite ends are also provided with circular grooves with sealing members. EFFECT: enhanced reliability of protection against corrosion over entire length of repair zone; reduced labor consumption. 3 cl, 2 dwg