TIGHT FIT HDPE LINING
 

The process involves the insertion of a tight-fitting plastic liner pipe inside of a steel pipe, thereby taking advantage of the mechanical strength of the steel pipe combined with the abrasion and corrosion resistance of the plastic liner pipe. The liner pipe’s physical properties are defined and specified in accordance with the characteristics of the product being conveyed by the pipeline. Because of the tight fitting design, the liner pipe is radially compressed (rolled down) to reduce its outside diameter during the insertion process. Insertion lengths can vary from short pull lengths to long pull lengths up to 1,500 meters (5,000 feet), depending on the pipe diameter and topographical contour of the pipeline.

The roller reduction method involves the radial compression of the plastic liner pipe by passing it through a series of roller reduction unit during the insertion process. Once installed, the plastic liner expands within the steel pipe and fits tight against the inside wall.


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