The buried pipes are replaced locally; the external anti-corrosion treatment uses epoxy coal tar pitch, which provides good anti-corrosion performance
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The image below shows a partial renewal of certain pipes in an oil and chemical industry’s surface water transmission pipeline; the outer walls of these pipes have been coated with epoxy coal tar pitch, which provides good corrosion protection.
Indeed, epoxy coal tar pitch has excellent corrosion resistance and is suitable for protecting the outer walls of pipes. .