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HDPE LINED PIPES

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HDPE liners have been used for decades to line carbon steel pipelines for protection against a corrosive or abrasive attack.  HDPE liners utilize a low cost and readily available raw material – typically specified as ASTM PE-3408 or PE-4710 or ISO PE-100 – which also is chemically resistant across a broad range of chemicals, and its physical properties are often favorable for increased resistance to erosion compared to bare carbon steel.  Additionally, the polymeric nature of HDPE and the resulting properties lends itself to use as a means of rehabilitating existing pipelines since HDPE is excellent for bridging holes and spanning gaps often caused by corrosion and erosion.  Finally, in addition to reducing or eliminating corrosion within the carbon steel pipelines, HDPE lining can also improve the flow characteristics of the pipeline because although there is a slight reduction in pipeline inside diameter (ID), the absolute roughness of HDPE is approximately 30 times smoother than new carbon steel.
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