Prevent the cylinder from being heated. The gas cylinder in use should not be exposed to the hot sun, not near the fire source and high temperature area, and should not be less than 10 m away from the open flame; Do not use high pressure steam direct injection gas cylinder; It is forbidden to thaw with hot water and bake with open fire, and it is forbidden to heat the gas cylinder with a heat source exceeding 40℃. Measures should be taken to prevent the tipping of the gas cylinder when it is placed upright; When opening the valve, it should be opened slowly to prevent high temperature caused by high pressure of the accessories; Cylinders of combustible gas should not be struck with steel tools to prevent sparks. The valve and accessories of the oxygen cylinder must not be stained with grease. Do not operate the oxygen cylinder after the hands or gloves are stained with oil. The gas cylinder should be used to the end of the spare gas, mainly to prevent mixing with other gases or impurities caused by accidents. Gas cylinders are used in situations where backflow (backflow) is possible, and there must be devices to prevent backflow, such as check valves, check valves, buffer tanks, etc. Residual oil and gas in liquefied petroleum gas cylinders shall be recovered by facilities with safety measures and shall not be disposed of by itself. Strengthen cylinder maintenance. The paint layer of the outer wall of the gas cylinder can not only be anti-corrosion, but also a sign of identification, which can prevent misuse and mixing, and maintain the integrity of the good paint surface and the clarity of the mark. The mixing of water in the bottle will accelerate the corrosion of the inner wall of the cylinder, and the cylinder must be dried before filling. The unit using the gas cylinder shall not change the variety of the gas filled by itself or change the color symbol of the gas cylinder without authorization. It is necessary to apply for replacement, and the cylinder inspection unit is responsible for refit the cylinder. The unit responsible for modification determines whether the cylinder is suitable for the gas to be replaced according to the cylinder manufacturing seal mark and the safety condition. When refitting, the inside of the gas cylinder should be thoroughly cleaned, inspected, stamped and painted with inspection marks, replaced with corresponding accessories, and replaced with the words, color rings and colors of the modified gas