FIELD: erection and repair of pipe lines. SUBSTANCE: for connecting the pipes having inner anticorrosive coats, inner surfaces of ends of pipes shall be first lined: to this end, thin-walled bushes are pressed at preset distance from ends of pipes. Ends of bush are connected with pipe by welding. Corrosion- and heat-resistant metal material is built up on surface of pipe between its end and bush. Ends of pipes are connected by welding in two stages: first, built-up material is welded and then material of pipes. EFFECT: enhanced reliability. 2 cl, 7 dwg
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