| 摘要 |
An electric power cable for use in hydrocarbon pipeline heating systems and adapted to be installed as a piggyback cable (12, fig.1) on said pipelines (10, fig.1), the cable comprises a multi-wire stranded conductive core 2 with an outer insulation 4 and at least one outer protective sheath 8 as well as armouring means; the armouring means is incorporated centrally in said conductive core 2 as integral tensile strength wire elements 1. Preferably the tensile wire elements are steel wires of same cross-sectional area as those of the surrounding conductor core comprising of copper wire elements.
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