The gas is produced by the chemical reaction between calcium carbide and water:
CaC2 + 2H2O → C2H2 + Ca(OH)2 + heat
Acetylene (C2H2) possesses the advantage of a higher combustion velocity, higher flame capacity and higher flame temperature over other fuel gasses (propane, hydrogen natural gas). A gas with a higher combustion velocity produces a shorter flame. The flame capacity is the heat quantity in kJ (kiloJoule), which is supplied to every square centimeter of the workpiece surface per second. Acetylene oxygen are suited together in the mixing tube of the torch. The mixture ignites at 335 oC and yields.
Acetylene + oxygen → 4 CO2 + 2 H2O + heat
One cubic meter of acetylene gas produce up to 57,000 kJ of heat. This thermal energy heats the material to the melting point and fuses it.
Acetylene Cylinders are made of seemless drawn steel tubes. Even at 2 bar overpressure, acetylene tends to explode, a decomposition process which produce heat (C2H2 → 2 C + H2). Acetylene cylinders are therefore completely filled with a porous mass of asbestos, kieselguhr and charcoal, which is impregnated with acetone. The many small pores prevent spontaneous combustion. One liter acetylene dissolves about 24 liters of acetylene at atmospheric pressure (1 bar). An acetylene cylinder normally contain 13 liters of acetone. If the filling pressure (overpressure) is 18 bar, i.e. the normal pressure is 19 bar, then 13 x 19 x 24 = 6000 liters of acetylene are dissolve in a cylinder.
If cylinder is opened, the pressure falls and consequently also the solubility of acetylene. Acetylene escapes from the solution and rises upwards.
Pressure Relief Values
This valve reduce the internal pressure in the cylinder to the working pressure and hold it as constant as possible. Pressure relief can be carried out in a single step (generally with fuel gasses) or in two steps ( in the case of oxygen).
The pipes are blue for oxygen and red for fuel gas. They must be fixed clamps or staples to the nozzles.
Accident Prevention:
CaC2 + 2H2O → C2H2 + Ca(OH)2 + heat
Acetylene (C2H2) possesses the advantage of a higher combustion velocity, higher flame capacity and higher flame temperature over other fuel gasses (propane, hydrogen natural gas). A gas with a higher combustion velocity produces a shorter flame. The flame capacity is the heat quantity in kJ (kiloJoule), which is supplied to every square centimeter of the workpiece surface per second. Acetylene oxygen are suited together in the mixing tube of the torch. The mixture ignites at 335 oC and yields.
Acetylene + oxygen → 4 CO2 + 2 H2O + heat
One cubic meter of acetylene gas produce up to 57,000 kJ of heat. This thermal energy heats the material to the melting point and fuses it.
Acetylene Cylinders are made of seemless drawn steel tubes. Even at 2 bar overpressure, acetylene tends to explode, a decomposition process which produce heat (C2H2 → 2 C + H2). Acetylene cylinders are therefore completely filled with a porous mass of asbestos, kieselguhr and charcoal, which is impregnated with acetone. The many small pores prevent spontaneous combustion. One liter acetylene dissolves about 24 liters of acetylene at atmospheric pressure (1 bar). An acetylene cylinder normally contain 13 liters of acetone. If the filling pressure (overpressure) is 18 bar, i.e. the normal pressure is 19 bar, then 13 x 19 x 24 = 6000 liters of acetylene are dissolve in a cylinder.
If cylinder is opened, the pressure falls and consequently also the solubility of acetylene. Acetylene escapes from the solution and rises upwards.
Pressure Relief Values
This valve reduce the internal pressure in the cylinder to the working pressure and hold it as constant as possible. Pressure relief can be carried out in a single step (generally with fuel gasses) or in two steps ( in the case of oxygen).
The pipes are blue for oxygen and red for fuel gas. They must be fixed clamps or staples to the nozzles.
Accident Prevention:
- Open the cylinder value gradually, use two cylinders for high consumption.
- Close the valves after every use.
- Protect the cylinders from heat.
- The normal working pressure for acetylene is 0.3 to 0.6 bar and should not exceed 1.5 bar.
- Do not lay the acetylene cylinders flat or the acetone will run out. Cylinders must be tested every three years to begin with and every six years thereafter.
- All devices handling oxygen must be free from greese, glycerine and oil. Oxygen and oil are explosive when mixed. Welding goggles and protective filters are essential protection for the eyes.
Comments
I think you mean One liter of acetone...
If a cylinder has a volume of 100L, how many L of acetone will be added to the cylinder? I would think as much as it would take.