• Mellcon Engineers Private Limited

LPG Storage Tanks

Mellcon can supply multiple LPG Liquefied Petroleum tanks LPG Mounded Bullets & systems in a range of sizes to suit the requirements of the customer. The two main forms of LPG are commercial butane and commercial propane. LPG may be liquefied by moderately increasing the pressure or by reducing the temperature. Gas suppliers to store large volumes of LPG use refrigerated storage. The main form of LPG storage is in special tanks known as 'pressure tanks'. Commonly these pressure tanks are termed 'bulk tanks' or LPG Bullets. Because LPG has a high coefficient of expansion in its liquid phase, the tanks are never completely filled with liquid (tanks are filled to approximately 85% of their water capacity), the remaining space being taken up with vapor (often referred to as the vapor space) to facilitate expansion without allowing the liquid to become 100% full (often known as hydraulically full). As LPG gas (vapour) is drawn from the tank, the vapour pressure in the tank falls and the liquid boils, producing more vapour and restoring the pressure to maintain boiling, the liquid absorbs heat from itself, from the metal alls of the tank in contact with the liquid (known as the wetted surface area) and from the air surrounding the tank. The available gas 'off take', therefore, is dependent upon the surface area of the tank, the quantity of liquid within the tank and the temperature. The low temperature of the liquid (often indicating excess Off take) may be indicated as 'sweating' (where the water vapour in air condenses on the wetted surface area of the tank) and if the off take is large enough 'frosting' (where the condensed water vapour freezes) on the walls of the tank.