Inspection of non-piggable pipelines

Typical applications for the system include product lines, flowlines, and firewater lines in refineries. The tools are currently being used in the Middle East for a project covering more than 50 pipelines with various diameters.

The equipment for on-site performance consists of three major components. The self-propelled inspection tool installed on the pipeline, the control panel for manual or remote-control operation, and the data evaluation and visualization electronic notebook. The tool can be opened and clamped on the pipeline within a few seconds. Depending on the tool size (available in 6, 8, 10 or 12in), this can be done manually or by use of a crane. An important feature of the RPS is its ability to bypass a variety of installations, like supports: whenever the scanning process pauses at a support, the tool opens and lifts its magnet yokes; afterwards, it lowers and closes the magnet yokes and continues the scanning process. This feature speeds-up the inspection process, allowing fast and reliable inspection of a large number of pipelines.

The on-site visualization notebook provides a real-time view on the inspection results, using ROSOFT data-management software that comes with the RPS package. The software, delivered to the client with the final report, offers complete access to all database results. Each defect can be viewed, evaluated in detail, and easily printed for field use. Feature assessment can be carried out in accordance with various codes, for instance POF, RSTRENG, and API 579..

This item is reproduced courtesy of the Pigging Products & Services Association: www.piggingassnppsa.com.

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