Acetylene high-pressure cylinder gas attention and classification requirements

- Jun 09, 2018 -

The acetylene high-pressure cylinder gas needs to be effectively inspected for leaks at the connection site before use. In the process of operation, it can be effectively coated with soap solution for inspection, and can be adjusted to a certain extent to ensure that no air leakage occurs. conduct experiment.

 When the acetylene high-pressure cylinder gas is used, the total switch of the cylinder is turned clockwise first, and the high-pressure meter reading needs to be observed to a certain extent. Then a certain amount of counter-clockwise opening of a switch outside the pressure-relief valve is performed. The hour hand rotates the low pressure gauge pressure adjusting screw, which will cause it to compress the main spring to open the valve. In this way, the imported high pressure gas is decompressed by the high pressure chamber and then enters the low pressure chamber after being decompressed and passed through the outlet to the working system.

 After the acetylene high-pressure cylinder gas is used up, it needs to turn off its cylinder main switch clockwise to a certain extent, and then loosen the pressure reducing valve counterclockwise to confirm whether the pressure reducing valve is closed.

 Acetylene High Pressure Cylinder Gas Precautions

1 When using, fix the cylinder firmly so as not to shake or fall over.

2. Switch the valve to operate slowly. Do not unscrew it or force it to open.

3. Acetylene is very flammable, and the combustion temperature is high, and decomposition explosion sometimes occurs. Keep the acetylene storage container in a well-ventilated place.

4. If acetylene gas cylinders are found to be hot, indicating that acetylene has been decomposed, the valve should be closed immediately, and the bottle body should be cooled with water. At the same time, it is best to move the gas cylinder away from the safety of personnel to handle it properly. When acetylene burns, it is absolutely forbidden to extinguish with carbon tetrachloride.

5. Do not use up all the gas in the cylinder, be sure to retain 0.2-0.3MPa residual pressure (pressure gauge pressure).

 High pressure cylinder gas classification

1. Compressed gases Gases with a critical temperature of less than -10°C are compressed in the presence of high pressure and are still in a gaseous state, such as oxygen, nitrogen, hydrogen, air, argon, and nitrogen. Such gas cylinders are designed to have a pressure greater than or equal to 12 MPa (125 kg/cm2) called high pressure cylinders.

2. Liquefied gases Gases with a critical temperature of ≥10°C are compressed and compressed to a liquid state and are in equilibrium with their vapors. These gases are called liquefied gases. Those with a critical temperature of -10°C to 70°C are called high pressure liquefied gases such as carbon dioxide and nitrous oxide. The critical temperature is higher than 70°C, and when the saturated vapor pressure is more than 0.1MPa at 60°C, the low pressure liquefied gas, such as ammonia, chlorine, hydrogen sulfide, etc., is called.

3. Dissolved gas Simply add high-pressure compression, which can generate gases that are dangerous for decomposition, explosion, etc. It must be dissolved in an appropriate solvent and filled with porous solids while adding high pressure. In the following 15 °C pressure of 0.2MPa or more, known as dissolved gas (or gas solution), such as acetylene.