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Title: Remote-field eddy-current inspection of unpiggable pipelines
Category: Technical papers from Pipeline World
Downloadable: Yes 
Project No.:
Research Agency:
Catalog No.: 872
Date of Publication: February 05
Price: $25.00 US
Authors: Albert Teitsma, Stephen Takach, Julie Maupin, Anne Fillipini, & John Kulpin
Abstract: In-line inspection tools cannot inspect most of the natural gas transmission pipelines and distribution mains due to restrictions in the pipelines that will not allow a pig equipped with current inspection technologies to pass. A review of known technologies for pipe inspection quickly leads to the conclusion that remote-field eddy current (RFEC) inspection is a viable solution for inspecting pipelines with multiple diameters, valve and bore restrictions, and tight or miter bends. All of the components needed for RFEC inspection can be made much smaller that the pipe diameter. RFEC inspection is commercially available for inspecting small-diameter piping without restrictions, several hundred feet at a time. We are modifying this technology to work in a free-swimming tool that can inspect miles of pipeline at time and by-pass restrictions.
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