400 BBL (barrel) tanks are commonly used in the oil and gas industry for storing and transporting fluids such as crude oil, water, and various chemicals. These tanks, with a capacity of approximately 16,800 gallons or 400 barrels, are often made of steel and are designed to withstand the harsh conditions of oilfield operations. They are used for temporary storage during drilling, production, and refining processes, as well as for transportation via truck or rail. 400 BBL tanks are available in various configurations, including open-top, closed-top, and dual-containment designs, to meet different storage and regulatory requirements. They play a crucial role in the oil and gas industry, providing safe and efficient storage solutions for liquids used in various operations.