| 摘要 |
PURPOSE:To delay abrasion damage in the feeding of a slurry as slow as possible, by forming a first layer having a uniform thickness to the inner surface of a steel pipe over the entire length thereof in the circumferential direction thereof and additionally forming a second thick layer to the first layer within a predetermined range. CONSTITUTION:A resin lining part 2 is formed to the inner surface of a raw steel pipe 3 over the entire length thereof as a first layer having a predetermined uniform thickness. In this case, lining is performed by a centrifugal molding method and, at the point of time when the generation of the liquid dripping phenomenon of the resin is eliminated, the rotation of the steel pipe is stopped and the injection of the resin for a second layer is performed. The thick lining part 1 of the second layer is continuously formed in a range of 50% the circumferential length of the steel pipe but, without performing the stationary curing or rotation of the resin, the lining thickness of the pipe bottom side part is additionally increased by curing under reciprocal movement. As a result, the offset abrasion to the pipe bottom side part can be dealt with and the life of a slurry transport pipeline is enhanced.
|
