What is the ignition procedure of gas welding?

1. First open the main gate of the oxygen cylinder and adjust its output pressure to 0.3-0.5 MPa, as shown in the figure below:

2. Then open the main door of the gas cylinder and adjust its output pressure to 0.3-0.5 MPa, as shown in the figure below:

3. Then open the gas valve of the welding torch, as shown in the following figure:

4. Then ignite the torch nozzle with an open flame, as shown in the following figure:

5. Then open the oxygen valve of the welding torch, as shown in the figure below:

6. Finally, adjust the oxygen control knob and gas control knob to adjust the flame to neutral flame, as shown in the following figure: