| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat insulation piping system of resin piping excellent in the long term heat retaining property of a cold/hot water pipe.SOLUTION: A heat insulation piping system 100 includes resin piping 200, a heat insulation fiber layer 400, and a coating layer 510. The resin piping 200 is constituted by using a polyolefin resin as a main component. The heat insulation fiber layer 400 coats an outer peripheral surface of the rein piping 200. The coating layer 510 coats a surface of the heat insulation fiber layer 400. If a linear expansion coefficient of the rein piping 200 is defined as x, and a linear expansion coefficient of the coating layer 510 is y, a relationship of x<20×10/°C, and y/x<10 is satisfied.SELECTED DRAWING: Figure 1 |
