Mesa flexible roof drain systems ensure faster and efficient drainage of water from Aboveground Storage Tank's floating roof without the risk of product entering the drain or water entering the product. Mesa Armor Clad range of flexible roof drains are available in sizes up to 8 inches diameter. They are made of hydrocarbon resistant materials for extended service life in crude oil and other refined products. Many Armor Clad flexible roof drains are in operation in India since 1997.