METHOD Chuyko corrosion protection of welded joints of pipes with internal protective coating

摘要

1. A method for internal corrosion protection of welded joint pipes with an internal protective coating, comprising installing a protective sleeve coaxially inside of the pipe to form an annular cavity between the outer surface of the sleeve and the inner surface of the welded joint being insulated pipe with surrounding covering protected portions, welding the pipe ends, the sealing of the annular cavity the ends of the sleeve, filling the annular cavity through the at least one locating hole in one or both connectable m shirts liquid sealing material with subsequent polymerization, characterized in that the protective sleeve before setting its plastic deformation is carried out to a size matching shapes ensuring the sleeve-shaped inner surface of the pipe in a joint area and a gap therebetween to form said annular polosti.2. A method according to claim 1, characterized in that the liquid filling the annular cavity sealing material is carried out by evacuating the annular space, followed by feeding said material therein and then to exposure to said material davleniem.3 atmospheric or excess pressure. A method according to claim 1, characterized in that the protective sleeve when installed between the protective sleeve and the welded seam has a steel ring-cushion contacting surface with the outer surface of the welded joint and having protrusions on the inner surface in contact with the outer surface of the protective sleeve, and the welding pipe ends are welded to the steel of the ring-podushke.4. A method according to claim 1, characterized in that the protective sleeve,