| 摘要 |
Insulated pipe (1), for sanitation and heating installations, has an inner copper or copper alloy pipe (2) with an outer and concentric plastics pipe (4), and a barrier layer (6) between them. The barrier layer is brittle, so that it breaks apart at nominal fracture points (10) when the outer pipe is removed. Insulated pipe (1), for sanitation and heating installations, has an inner copper or copper alloy pipe (2) with an outer and concentric plastics pipe (4), and a barrier layer (6) between them. The barrier layer is brittle, so that it breaks apart at nominal fracture points (10) when the outer pipe is removed. The barrier layer is of plastics, with filling materials of chalk, mica, graphite, gypsum, ceramic powders or brittle plastics.
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