This technical paper shows how a dyke wall is designed and built in a Petrochemical complex. Petrochemical complexes contain tanks which store various combustible and inflammable materials like Benzene, Toluene, Xylene, and similar type of petrochemicals. The tank farm contains vertical and horizontal tanks to store the above-said materials and is constructed with plain cement concrete (500 mm thick) dyke wall around these tanks for the long life of the structures. Dyke walls of varying heights are constructed. In this study different types of dyke walls constructed based on the locally available materials are shown. The dyke walls are of various types/sizes, keeping in view the fire load aspects and distance from critical operations, area of effectiveness, ease of workmanship in construction, and cost-effectiveness. In this case study, dyke walls have been constructed using locally available materials/bricks and CC blocks. The extract of photos has been obtained from the public domain and has been used within the paper for demonstration.