Monitoring of Lined Pipeline

Abstract

An integrity monitoring system for a lined pipeline is provided for monitoring the integrity of a polymer liner in a host pipe. Methods and apparatus are described by which a lined pipeline is provided with such an integrity monitoring system sensor cable is able to bridge a joint between sections of lined pipe, for example by routing the sensor cable across the joint via a channel in an electrofusion fitting or by connecting successive lengths of sensor cable via pass-throughs in an electrofusion fitting. Advantageously, the sensor cable is disposed within a continuous annulus between linings and host pipes, and the continuous annulus is maintained across pipe joints using electrofusion fittings.

1 . A method of producing a lined pipeline with an integrity monitoring system,
 comprising:   providing a first section of lined pipe with a first sensor cable portion disposed in a continuous annulus between a first host pipe and a first pipe lining;   providing a second section of lined pipe section with a second sensor cable disposed in a continuous annulus between a second host pipe and a second pipe lining; and   joining the first pipe lining to the second pipe lining using an electrofusion fitting configured to enable the first sensor cable portion to communicate with the second sensor cable portion.   
     
     
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