FIELD: building, namely protection of welded joints of pipelines with aggressive media. SUBSTANCE: method comprises steps of placing inside end portions of tubes sleeve with sealing rings and inner rim having folded edges; in zone of welded joint remaining slit; supplying pressurized sealing paste through said slit by means of probe to cavity restricted by inner rim and sealing elastic ring until paste penetrates through openings outside zone of thermic influence of welding process; after sealing tubes by excess pressure, closing openings and welding up slit. EFFECT: enhanced reliability of protection of pipeline joint against corrosion. 6 cl, 1 dwg
