| 摘要 |
PURPOSE:To inexpensively prepare an abrasion-resistant inner surface coated pipe while improving workability by forming a lining layer to the inner surface of a pipe using an urethane resin having a shape memory characteristic. CONSTITUTION:After a shape memory resin pipe 1 reduced in its diameter or folded up to be deformed into a small size is loosely inserted in a steel pipe to be lined, hot air or high temp. steam is blown in the pipe 1 to restore the pipe to the original shape under heating. At this time, since the inner diameter of the steel pipe 6 to be lined is smaller than the outer diameter of the resin pipe restored in its shape, the resin pipe to be restored can be closely brought into contact with the inner surface of the steel pipe. |
