FIELD: building industry, particularly pipeline laying and maintenance. SUBSTANCE: method involves applying anticorrosion covering on inner pipeline surfaces, arranging protective bushings having anticorrosion covering inside pipelines in connection areas thereof. Each bushing has annular slots formed on outer surface and central annular groove filled with heat-insulation material. Seal rings of elastic resilient material are placed in annular slots. Weld seam area located between seal rings is filled under pressure with viscous liquid with low corrosiveness by pipeline pressure testing with the use of above liquid. EFFECT: increased pipeline reliability. 4 cl, 2 dwg
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