Fuel tank is used for storage of oil in the rig site, to supply fuel energy for generator or other application in the rig. GN designed fuel tank is with compact structure, reliable function and customized size and color. See the attached photo, it is a fuel tank designed by GN. 
The construction of fuel tank is with high standard, it must be filled in a secure way, without sparks, and avoid leakage and limit evaporative emissions.