Early consideration of geotechnical conditions in coating selection and backfill design could prove technically, economically and environmentally beneficial. In addition, bedding, padding and backfilling requirements are not specified on a project specific basis and the current methodology for design, engineering and construction does not allow optimisation of the coating and backfill system. This paper is intended to review the financial and technical issues that need to be considered when selecting external coating systems for the corrosion protection of high-pressure transmission pipelines.

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