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Normally, the LPG gas is stored in liquid form under pressure in a steel container, tank or cylinder. LPG is a gas at high pressure, but it is liquefied when refilled under moderate pressure. It can be easily condensed, package, stored and utilized, which makes it an ideal energy source for a wide range of applications.
The above illustration is very easy in a LPG gas skid filling system, but can be very dangerous using the tank-to-tank refill method mostly used by local LPG retail resellers. In black market, especially in undeveloped countries such as Nigeria, you can almost find local LPG retail resellers everywhere you turn to. This is a very bad practice in terms of safety of lives and properties, because LPG gas expands rapidly, so any leakage will sink and spread in low lying areas and may be difficult to disperse.
Refilling cooking gas cylinders at LPG gas plants through the gas skid refilling system is the best and most safer option. It is simple, no gas leak, no cheating; and the best part is, you get to see what you are paying for through the gas dispenser dashboard.
The LPG gas skid refilling system is mainly operated by skilled person's. Gas leakage test is performed before any refilling.
A View On Safety Practices At LPG Gas Refilling Plants
LPG gas skid operators always do soapy leak test before refilling gas cylinder bottles. This is to ensure and confirm that the cooking gas cylinders are safe for refilling. Also, being the fact that safety is a priority in LPG refilling plants, safety kit such as boots, nose cover and so on are put on to prevent cold burns and injuries. Before a cooking gas cylinder is refilled, sufficient air is released so to allow intake of new LPG gas content into it. Purging the air, inside the gas cylinder bottle is eliminated of air. LPG gas skid operators also check if the O-ring sealing rubber is missing from the gas cylinder bottle valve. O-ring sealing rubber are replaced if found wornout or widen. Gas cylinders are not refilled it O-ring sealing rubber is not in place inside the gas cylinder bottle valve.
LPG expands rapidly when its temperature rises. So, one of the advantage of refilling cooking gas at LPG refilling plants is that, gas cylinder bottles are not overfilled. Space are allowed for expansion. The pressure of LPG in a container moves spontaneously. Overfilling can cause leakage and that may lead to fire or explosions.
How Refilling Through LPG Gas Skid Filling System Works
Depending on the LPG skid built, modern LPG gas skid comes with digital scale, in which gas cylinder bottles are placed on the TARE control scale. For manual gas skid dispenser, empty gas cylinder bottles are placed on a weighing electronic digital scale.
Then, a refilling nozzle gun or piston is attached/fitted into the gas cylinder bottle valve. The LPG gas skid circuit switch is then turn on. LPG gas skid comes with gas dispenser, storage tank and nozzles. The gas pressure is control from the pipelines assembly, while the refilling is done through the gas dispenser dashboard. All calibrated. LPG gas skid refilling system is run through the help of a motor pump engine, which helps transport LPG from the storage tank, through the pipelines to the gas dispenser.