October 2011, Vol. 238 No. 10

Features

ILI Of New Rehabilitation System Uses Axial And Spiral Field MFL

A new technology for the external rehabilitation of pipelines known as Xhab® has been developed by Pipestream Inc. This technology involves wrapping multiple layers of ultra-high strength steel (UHSS) strip in a helical form continuously over an extended length of pipeline using a dedicated forming and wrapping machine. The reinforcement afforded by the strip can be used to 1) repair a defective section of pipe (e.g., externally corroded or dented), adding strength to restore it to its original allowable operating conditions, or 2) reinforce an intact but de-rated section of pipeline (e.g., through a location class change) to maintain reduced hoop stress in the base pipe as