Tank External Installation Works

Cathodic protection system for the tank bottom is based on an impressed current grid anode system placed directly underneath the tank bottom. The system is designed to ensure a relatively uniform current distribution that maintains all points on the tank bottom within the required protection criteria limit. This is achieved using mixed metal oxide (MMO) coated titanium ribbon anode, installed as a series of parallel anode ‘runs’ over (and perpendicular to) a series of parallel titanium conductor bar lengths, such that the resultant configuration is a ‘grid’ network. At each crossing point between the ribbon anode and conductor bar, spot welding is applied to make the mechanical/electrical connection.

All cables are installed and clearly identified in the junction boxes before termination according to drawings. The location of the junction boxes are installed in such a manner that easy access to the junction boxes is maintained. The number of terminals and gland quantities are ensured to be in accordance with related  drawings, specs…

Before completion of tank bottom foundation works, permanent reference electrodes are installed and lead wires are terminated at test box. Electrodes are placed as close as possible to the tank floor to minimize the IR drop in the soil path.

Finally, DC output cables are terminated securely in the cable gland plate of the Transformer Rectifier.

Our company is capable of doing the installation for all type of ring beam, filled soil, junction boxes on top or near the tank etc…