Akiyama, Higuchi, Nose, Toyoda, Kitano, Kuriyama
Composites # 2006 Washington DC
Since the year 2001, the Japan Gas Association has started the development of new renewal methods capable of cost reduction for modification work by inserting a new double-layered corrugated plastic pipe into the old gas pipe to encourage the modification of aged house pipes and upgrade the level of safety. The specific development objectives include preliminary survey systems for buried pipes, insertion materials and insertion tools/equipment including the trench-less branching technique. For insertion materials, the innovative double-layered corrugated plastic gas pipes are used. In the future, we will make it fit for practical use after a final evaluation assuming it is used in the actual situation.