Testing to Determine Whether a PetroSleeve Can be Used for an Electrical Connection to a Pipe for AC Mitigation

The use of a mechanical electrical connection to a pipeline is tested to determine its’ viability. Historically, the installation of a cadweld on pipelines has been the method generally accepted for attaching an electrical connection to pipe. Cadwelds are usually serviceable. In the case of accommodating up to 800 amperes of current, up to 3 CAD welds have been used. In addition, there is a general feeling in the pipeline industry to avoid cadwelds, if possible, because they can create a heat affected zone and the possibility of cracking. Where pipelines traverse or parallel high voltage transmission lines, there exists the possibility of voltage and current induction when phase imbalance occurs. These current flows can approach 800 amps. If a cadweld is the main conduct at the pipe surface, burns, high heat, or connection malfunction can occur. This paper describes the testing undertaken to determine if a PetroSleeve installation could be used as a mechanical electrical connection suitable for conducting up to 800 amperes of current. Following the initial testing, three sleeves were installed on operating pipelines for AC Mitigation.