Mellcon can supply multiple LPG Liquefied Petroleum tanks LPG Mounded Bullets & systems in a range of sizes to suit the requirements of the customer on Turnkey Basis duly approved by the CCOE chief Controller of explosives as per SMPV Rules. (pdf)
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. Refrigerated storage is used by gas
suppliers to store large volumes of LPG. 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 (vapor) 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.
When the liquid temperature rises, for instance in summer, the
vapor
pressure increases, when the liquid temperature drops, the
vapor
pressure drops. Under normal Indian conditions the pressure range
will be between 2-9 bar.
These are designed as per the recommendations in IS-2825 / ASME Sec Vlll DlV - 1 codes and the material of construction are SA-516 / IS-2062/ IS-2002/SS-304 or as per the specific requirement of the customer. Steel used for the Tank and its fittings meets the Low Temperature Carbon Steel criteria and is tested thoroughly before fabrication. During Fabrication stringent quality norms are followed. Each tank undergoes
various NDT & other inspection stages . We carry out tests like Dye Penetration Test, Radiographic Examination and the Hydro test.before
despatch.
