Citerne

A citerne is a tank or reservoir designed for the storage of liquids. The term derives from the Latin word cisterna, through French usage, and is used in various contexts to refer to containers that hold water, fuels, chemicals, or other liquids. In everyday language, citerne often designates fixed storage tanks installed in buildings, yards, or industrial facilities, but it can also refer to mobile tanks associated with road or rail transport.

Types and materials: Citernes come in a range of sizes and shapes, typically vertical cylinders, horizontal cylinders, or rectangular tanks. They are constructed from materials such as steel (sometimes with protective coatings), fiberglass, or high-density polyethylene (HDPE). Depending on the liquid stored, coatings, liners, or internal surfaces may be chosen to resist corrosion, chemical attack, or scaling. Citernes may include insulation, heating or cooling systems, and fittings such as inlet and outlet pipes, overflow, venting, access manholes, drains, and level indicators.

Common applications: Domestic use includes citer nes d’eau for drinking water or rainwater harvesting. In heating systems, they may store fuel oil or other fuels. Industrial and agricultural settings use citer nes to hold chemicals, solvents, or process liquids, and sometimes to serve as part of a larger storage or process system.

Installation and safety: Proper siting, anchoring, and foundations are essential. Many citer nes require venting, secondary containment or bunds, leak detection, grounding, and appropriate labeling. Regular maintenance—inspection for corrosion, leaks, and fittings, cleaning or disinfection for potable-water tanks, and verification of level gauges—is recommended to ensure long-term safety and performance.

Regulation and standards: Storage tanks are subject to safety, environmental, and sometimes fire-safety regulations that vary by country, including requirements for materials, containment, ventilation, and emergency measures.