Steel Bunded Oil Tanks from 600 litres all the way up to 100,000 litres. Each Steel Bunded Oil tank has two layers of sheet steel on each side and bottom that allows the outer tank to hold the 110% of the holding tank as specified in the PPG2 regulations. our range of steel bunded kerosene/heating oil storage tanks are available with lockable lids so the valuable oil in the tank is locked away from thieves.