| 摘要 |
PURPOSE: A multi-layered dual insulation pipe is provided to prevent a heat-insulation member and an outer pipe from being broken by absorbing the expansion of an inner pipe using a foamed heat-insulation member. CONSTITUTION: A multi-layered dual insulation pipe(100) comprises an inner pipe(110), a urethane heat-insulation member(130), an outer pipe(140), and a foamed heat-insulation member(120). The urethane heat-insulation member covers the inner pipe. The outer pipe covers the urethane heat-insulation member. The foamed heat-insulation member is located between the inner pipe and the urethane heat-insulation member. And the urethane heat-insulation member absorbs the expansion and contraction of the inner pipe.
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