Case study

A customer consulted with Tanco regarding a tank with severe bottom corrosion, both top and under side. After careful evaluation, the only viable repair option was to install a new bottom. The tank had an external floating roof and was 150 ft in dia. x 48 ft tall. The tank foundation consisted of a concrete ring wall, a release prevention barrier, a sand pad, cathodic protection, and leak detection. The tank was critical to the customer and the cost of an outage was significant. However, the customer sought to maximise the lifecycle cost while its asset was out of service. The company was a responsible care provider with a commitment to environmental stewardship, which meant that prevention of a release in the future was one of its top priorities. Tanco's task was to provide the customer with multiple repair methods, along with advantages and disadvantages of each option.

Written by Brandy Gibbons, Craig Greenslit, Brent Porter, Joshua Flock and Keegan Maloney, Tanco Engineering Inc., USA.

This article was originally published in the Summer 2017 issue of Tanks & Terminals. To read the full article, sign in or register for a free trial subscription.