| 摘要 |
The present invention relates to a manufacturing method of a clad pipe which couples pipes made of heterogeneous materials in a thermal fusion manner wherein the pipes made of heterogeneous materials are produced with pipes consisting of a different material in a furnace in a thermal fusion manner, having a step of progressing to a cooling step (S5) from a material insertion step (S4); and a transport roller of a first row drawing with a frictional force of 15 kg/sec when drawing from the furnace, and then arranging an hourglass shaped roller to draw from a second row and thereafter. |
