METHOD FOR LINING INNER SURFACE OF PIPE USING ICE PIG

摘要

PURPOSE:To entirely dispense with the recovery of a pig and to improve a lining surface, in a method for lining the inner surface of a pipe with a resin film by moving the pig, by using an ice pig melted or sublimed at room temp. as the pig. CONSTITUTION:In a method for lining the inner surface of piping wherein a resin 3 and a pig having a diameter slightly smaller than the diameter of piping 1 are introduced into one end of the piping 1 such as a gas pipe or a water pipe embedded in the ground and the pig is moved by the pressure of air to push the resin 3 to form a resin film 4 on the inner surface of the piping 1, an ice pig 2 melted or sublimed at room temp. is used as the pig. Since the ice pig 2 is melted and scattered after the lining execution of the piping, the piping 1 may cut at one end of the repairing section thereof and the excavation of the ground entirely becomes unnecessary. In the same way as a conventional rubber pig, the pushing action of the resin and the smoothing action of a lining surface can be performed.