| 摘要 |
PROBLEM TO BE SOLVED: To provide a resinoid pipe which can quickly and easily carry out the joint of pipes by the electric fusion pipe jointing by eliminating the scraping work of the surface portion of the pipe end in the joint of pipes by the electric fusion pipe jointing by surely preventing the deterioration of the resinoid pipe due to the oxidation of the surface layer portion. SOLUTION: A deterioration preventing means for preventing the deterioration due to oxygen is applied to the outside surface of the end portion of the resinoid pipe proper. The deterioration preventing means is made of the material, the oxygen permeation speed of which is lower than that of the resinoid pipe proper. COPYRIGHT: (C)2005,JPO&NCIPI
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