INTEGRITY ASSESSMENT OF 3LPE COATED PIPES STORED IN OPEN ENVIRONMENT FOR SEVERAL YEARS

Abstract

In present study integrity assessment of 3 layer PE coated pipes is discussed. Pipes were 3LPE coated several years ago and stored in open yard with direct exposure to environmental conditions. Several inspection and testing including visual inspection, Peel adhesion test, Impact test and continuity tests as specified for 3 layer PE coating in DIN 30670 has been performed to assess the integrity of coating. Inspection and testing results performed after several years of storage were found satisfactory however loss of gloss of coating is observed moreover it is recommended to perform UV degradation test to assess degradation percentage due to UV exposure by sun.