| 摘要 |
<p>A pipe with a double casing, particularly for petroleum product lines, is disclosed. In a preferred embodiment, the pipe comprises a self-supporting plate (7, 8, 9) made of an open-pore microporous material and arranged in a sealed ring-shaped space (5) between coaxial inner (1) and outer (2) tubes, said plate being flexible enough to be wound around the inner tube (1). The plate is preferably thinner than the ring-shaped space (5) so that a gap in which the pressure is reduced is provided between said plate and the outer tube (2).</p> |
