What safety matters should be paid attention to when checking the cylinder and discharging residual gas?

Different gas cylinders have different requirements when discharging residual gas:
1) oxygen cylinder. Fireworks and inflammable and explosive materials should be strictly prohibited in the inspection places of oxygen cylinders; opening the valve should be slow to prevent the oxygen oxygen in the bottles from rushing out and generating electrostatic sparks; it should not be stored or discharged with other combustible cylinders at the same time;
2) nitrogen cylinder. Open the doors and windows when the nitrogen cylinder emits residual gas, pay attention to the air circulation, and prevent suffocating accidents. Residual gas emission should be carried out slowly;
3) argon bottle. Notes are the same as nitrogen. However, because its density is higher than that of air, it is easy to be concentrated in low places, so you should pay attention to opening the door when discharging;
4) acetylene bottles. Attention should be paid to the pipe sealing discharge whose outlet is higher than that of the workshop; the discharge speed should be slow to prevent the generation of static spark; fireworks are strictly prohibited at the inspection site; residual gas should not be discharged at the same time with other cylinders.