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SL
No. |
Acetylene |
LPG
(Propane) |
1 |
Highest flame temperature up to 3100
Deg C |
Flame temperature up to 2800 Deg C |
2 |
Flame speed up to 7.5 m/sec |
Flame speed up to 3.3 m/sec |
3 |
Most of the heat released is in inner
cone |
Most of the heat released is in outer
cone |
4 |
Higher flame GCV of inner cone (4500
kcal/M3) |
Lower flame GCV of inner cone (2500
kcal/M3) as compared to acetylene |
5 |
Stoichiometric air fuel ratio1.2:1
(Requires 2.5 to 3 Oxygen cylinders for burning one Acetylene cylinder) |
Stoichiometric air fuel ratio 4.3:1 (Requires 7 to 8
Oxygen cylinders for burning one LPG cylinder) |
6 |
Can be used in gas welding, as
acetylene when burning with air creates reducing zone that cleans the steel
surface |
Cannot be used in gas welding as it
does not create reducing zone |
7 |
Acetylene has Specific gravity 0.9
kg/m3, so if it leaks it will raise in air without harming much |
Propane has Specific gravity 1.6
kg/m3, which is heavier than air. So if it leaks it will concentrate in deck
level or any other closed/corner area |
8 |
Acetylene requires less air for
complete combustion |
Propane requires more air for
complete combustion, so there may be chances of formation of carbon monoxide
(CO) in case of incomplete combustion. This incomplete combustion may result
into poisoning of working area, as CO is poisonous gas |
9 |
Can be used for cutting & welding
applications in industry |
Used only for domestic applications |
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