September 2010

Loss Prevention

Hydrobulging of storage tanks and its effect on first support selection

Case studies prove that installing variable spring supports is a viable option

Choudhury, M. G., Reliance Engineering Group (REG); Johri, S., Tripathi, R., BecRel Engineering Pvt. Ltd.

In the hydrocarbon industry, especially refineries, many storage tanks exist. A storage tank is a container or vessel generally used to store raw crude, intermediate and final-product liquids from refineries or other process industries. The roots of these tanks can be fixed, cone, domed or floating. Tanks vary in diameter and can measure up to 102 m. Large-diameter tanks, larger than 90 m with heights up to 20 m are not uncommon in refineries. These tanks act as feed sources to feed pumps and as reservoir to store discharge from pumps. With regards to differential settlement between the tank and connected piping (generally large pipes), there are two pipe-supporting approaches:• 

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