DIRECT ELECTRICAL HEATING FLOW SYSTEM
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United States of America Patent
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Issued Date -
May 3, 2012
app pub date -
Oct 11, 2011
filing date -
Nov 3, 2010
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Abstract
A direct electrical heating flow system (100) includes at least one flow pipe (20) and at least one cable (120) disposed along the at least one flow pipe (20) for heating and/or monitoring the at least one flow pipe (20). The cable (120) includes an inner conductive region (180) surrounded by an annular insulating region (190, 200) and peripheral thereto an outer annular conductive region (210). The inner conductive region (180) encloses an optical fibre waveguide region (160) including at least one optical fibre waveguide (150) for conveying at least one information-bearing signal. Enclosing the optical fibre waveguide region (160) within the inner conductive region (180) and placing a soft bedding (170) under the conductive region (180) renders the cable (120) robust to impact damage as well as being more tolerant to stress elongation.
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