(1) Gas cylinder should be placed in a well ventilated place, away from sunlight, comply with precautions of use of liquefied gas.

(2) Environment temperature is below 40℃.

(3) Fire is forbidden within 2m from gas cylinder, at the time, fire fighting equipment should be provided.

(4) Check leakage before working.

(5) Check gas cylinder and pressure-reducing valve every 3 months.

(6) Pressure-reducing valve should be non-oil type.