JOINT FOR PIPES PROVIDED WITH ANTI-CORROSION COATS Russian patent published in 2004 - IPC

FIELD: construction engineering; erection and operation of pipe lines; corrosion protection of inner surfaces of pipe welded areas. SUBSTANCE: proposed joint has two pipes with enamel coats and bush mounted coaxially inside than, thus forming cavity in pipe joint area. Outer surface of bush is provided with circular bore and radial thrust projections are made in middle section integral with bush body. End sections of bush are provided with starting cones and stepped circular grooves where sealing members are mounted with adhesive material placed between outer surfaces and inner surfaces of pipes. Sealing members are made in form of L-shaped collars and their baffle are located at obtuse angle relative to vertical strut; it is directed towards inner surfaces of pipes and end face of baffle is directed towards pipe joint to erection seam. Space between outer surface of bush, collars and inner surface of pipes is filled with adhesive material. EFFECT: extended field of application. 2 cl, 3 dwg