dipil Started The Discussion:
Industrail LPG is widely used in the industries for gas cutting operation and strictly prohibiting the use of Domestic LPG.
If we use the domestic LPG for industrial purpose, as per Liquefied Petroleum Gas Control Order - 2001, you may get an imprisonement upto 7 years together with fines.
Is there any SAFETY Hazard in using the domestic LPG in Industrail Use than the above mentioned statue?
Any other technical reason which prevent us from using the Domestic LPG for Industrial use?
Awaiting for your valuable reply's.
Dipil Kumar V
LPG is a mixture of commercial butane and commercial propane having both saturated and unsaturated hydrocarbons. LPG is inherently dangerous on account of fire, explosion and other hazards. This calls for special attention on the manner in which it is bottled, transported or used. These hazards can have an impact on both the plants and the public. As a consequence of this special emphasis has been placed on the safety regulations in its handling system design, etc.LPG at atmospheric pressure and temperature is a gas which is 1.5 to 2.0 times heavier than air. It is readily liquefied under moderate pressures. The density of the liquid is approximately half that of water and ranges from 0.525 to 0.580 @ 15 deg. C The pressure inside a LPG storage vessel/ cylinder will be equal to the vapour pressure corresponding to the temperature of LPG in the storage vessel. The restriction on vapour pressure is stipulated by IS-4576 which in turn regulates the lighter ends of hydrocarbons and this governs the design parameters for storage vessels.
The vapour pressure is dependent on temperature as well as on the ratio of mixture of hydrocarbons. At liquid full condition any further expansion of the liquid, the cylinder pressure will rise by approx. 14 to 15 kg./sq. cm. for each degree centigrade. This clearly explains the hazardous situation that could arise due to overfilling of cylinders.
We should not use LPG for gas cutting in industrial fabrications and other jobs. LPG is a mixtureof Butane and Propane only whether used domestic or Industiral.
• Low cost compared to Acetylene and easier to transport.
• Does not burn as hot as acetylene in its inner cone, and so cannot be used for welding. Propane has high flame temperature leading to faster cutting, lower slack formation and lower consumption of fuel. Propane, however, has a very high number of BTUs per cubic feet in its outer cone, and because of this with the right torch (injector style) makes a faster and cleaner cut than acetylene, and is much more useful for heating and bending than acetylene.
• Comparatively high cost
• Acetylene gas is shipped in special cylinders designed to keep the gas dissolved. Acetylene when burned with oxygen gives a temperature of 3200 °C to 3500 °C (5800 °F to 6300 °F), which is the highest temperature of any of the commonly used gaseous fuels.
Above absolute pressure acetylene is unstable and may explode.
With this you can realize that LPG is far safer than Acetylene.
The factors you have to consider in selecting a gas:’
a) Thickness of metal being cut.
A well trained employee will deal safely with any of these gases.
Now just try to explain how an acetylene cylinder is constructed and why acetylene should not be laid horizontally?
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