| 摘要 |
PURPOSE:To provide a lined pipe production method by which expansion of a pipe can be prevented even if the amount of resin or the resin pressure is excessives at the time of molding a resin lining layer. CONSTITUTION:Cores 13, 14 are inserted in a steel pipe 2. A cavity C is formed between the inner surface of the steel pipe and the cores. In this state, a resin 5' is injected into the cavity to form a resin lining layer on the inner surface of the steel pipe 2. At that time, the outside of the steel pipe 2 is held by expansion preventive molds 21, 22, whereby the expansion of the steel pipe 2 by a resin pressure can be prevented. |
