ELECTRIC FUSION RESIN PIPE AND ITS PROCESS OF MANUFACTURE AND ITS JOINING INSPECTION METHOD

To easily find a fusion defect and definitely prevent the leakage damage after operation when electro-fused without scraping a fusion-bond planned area of the resin pipe.SOLUTION: An electric fusion resin pipe 10 has an opening at the end part or an intermediate part, and the vicinity of the opening is fused to an electric fusion joint 20. In the fusion-bond planned area on the outside of the resin pipe 10, a fusion inhibition layer 11 is continuously bonded from the edge of the opening to at least the edge of the fusion-bond planned area. In one embodiment, the fusion inhibition layer 11 extends in strips along the entire length of the resin pipe 10 in the pipe axial direction. When the resin pipe 10 is electro-fused to the joint 20 without scraping the fusion-bond planned area of the resin pipe 10, since the adhesion region of the fusion inhibition layer 11 is a non-fusion region, by a water pressure inspection, water leakage from the non-fusion region is generated and the fusion defect can be found.SELECTED DRAWING: Figure 2 【課題】 樹脂管の融着予定領域をスクレイプせずに電気融着した場合に、融着不良を容易に発見でき、供用後の漏水被害を確実に防止することができるようにする。【解決手段】電気融着用樹脂管１０は、端部または中間部に開口を有し、開口の近傍部が電気融着継手２０に融着される。樹脂管１０の外面の融着予定領域には、開口の縁から少なくとも融着予定領域の縁まで、連続的に融着阻害層１１が付着されている。一実施形態では、融着阻害層１１は帯をなし樹脂管１０の全長にわたって管軸方向に延びている。樹脂管１０の融着予定領域をスクレイプせずに樹脂管１０と継手２０を電気融着した場合、融着阻害層１１の付着領域が非融着領域となるので、水圧検査により非融着領域からの漏水が生じ、融着不良を発見できる。【選択図】図２