Large storage tanks typically vary in capacity from their original specifications. These variations are sometimes the result of changes made during the construction process, but can also occur due to prolonged environmental exposure and the extreme stresses experienced during normal use. Tank calibration is the process of collecting tank measurements and calculating accurate tank capacity based on these measurements. Also known as “tank strapping,” tank calibration results in the creation of a unique capacity table for each tank that allows an operator to precisely determine the volume of product available based on its level within the tank. Tank calibration should be performed when a new tank is placed into service, as well as every 5 years. In addition, tank measurements should be retaken after any major modifications or repairs that require the tank to be taken out of service. In addition, tank capacity tables should be reviewed and updated as necessary following tank calibration activities.
In a world where business margins are shrinking, cost control in transaction of petroleum, LNG, LPG, chemicals and oils is very essential. While storing, transferring, blending or processing, strict consistency in volumetric measures is imperative. A high standard of calibration not only ensures quality products, but also less trouble with customers, govt. department, internal stock taking and accountability. Calibration of tanks is a science of accurately determining the volume in a confined vessel at various stages.
Imperceptible to the human eye, tank shells undergo elaboration and contraction due to hydrostatic liquid head pressure, working temperture in regular operation and may also tilt and settle. These conditions can make a big difference in volume at various levels and dip reference height if left un-calibrated or wrongly calibrated. Also any structural changes or repairs made to the tank should call for re-calibration. In most cases you should also undertake a detailed tank settlement, roundness and tilt survey, which we also specialize. Calibration and stamping of storage tanks has been made mandatory in India at least once every 5 years by the Directorate of Legal Metrology and worldwide as per rule by the respective governmental or special agencies of the particular country.
Annapurna Enterprises provides accurate and detailed measurement and calibration of large petroleum, fuel, and chemical cargo storage tanks. Tank calilbration includes shore tanks and ship tanks used for holding crude oil, refined petroleum products, LPG, LNG, and other wet or dry bulk cargoes. Using the latest technology for tank calibration, engineers and technicians are equipped with state-of-the-art measuring devices. Intertek measures and calibrates tanks of various shapes, sizes and designs. Loss Control investigations are available from seasoned experts with years of industry experience.