A New Approach to High Performance Polyolefin Coatings
نویسندگان
چکیده
This paper discusses two common problems, “weld tenting” and low coating thickness over the external weld, and their causes in traditional three layer polyolefin pipeline coatings. To tackle these problems, a new approach to applying multilayer polyolefin coating to pipes is introduced. The new system consists of side-extruding high density polyethylene over a graded structure polyethylene (GSPE) coating. This study demonstrates that the new coating approach can provide exceptionally uniform coverage of external welds, successfully eliminate “weld tenting”, and significantly reduce residual stresses in the coatings.
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