| 摘要 |
A double wall tank for the storage of liquids is manufactured from a rigid, cylindrical single wall inner tank by applying a primary spacing material to at least a portion of the exterior surface of the inner tank, applying over that inner tank exterior surface and primary spacing material a substantially rigid outer sheath of material, forming an opening through that sheath extending the full length of the sheath, introducing the secondary spacing material between the sheath and the inner tank exterior surface, and closing the sheath opening. This method provides a double wall storage tank in which at least a portion of the liquid-tight outer sheath is spaced from the inner tank.
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