Rectangular Tanks can be designed using UL-142, Above Ground Steel Tanks for Flammable and Flammable Liquids. Rectangular tanks are ideal for tight spaces such as offshore facilities, but have advantages for mixing and material handling. However, they typically cost less than cylindrical tanks. In a nutshell, the cylindrical tank: will be faster on delivery, easier to manufacture, cheaper, easier to clean and maintain, more robust, more integrity and stronger, will resist corrosion more because it is not a “weak corner source” and can be drained. easier and more positive. It will also resist more positive and negative pressures than its rectangular counterpart.