1. High-pressure steel cylinders should normally be placed in a special room outside the laboratory and should not be prevented in the open air. Good ventilation is required. Keep away from open flames and heat sources, the distance is not less than 10m, the ambient temperature is not more than 40°, and must be isolated from explosives, oxidants, flammables, natural materials and corrosive materials.
2. Wear a bottle cap and a rubber waistband when handling the cylinder. In order to protect the on-off valve and avoid occasional rotation, it is necessary to tighten the helmet on the cylinder. When moving the cylinder, the switch valve cannot be held by hand, nor can it roll on the ground to avoid impact.
3. The pressure reducing valve used in the cylinder should be used exclusively. The pressure reducing valve used in the oxygen cylinder can be used on a nitrogen or air cylinder, but the pressure reducing valve for the nitrogen cylinder should be used for the oxygen cylinder, and the grease must be thoroughly washed. The threads of the nitrogen and acetylene cylinder pressure reducing valves are generally reversed, and the rest are positively buckled. For safety reasons, the gas valve should be placed on the other side of the pressure relief valve to prevent high pressure airflow or valve components from injuring the human body.
4. The acetylene cylinder is filled with granular activated carbon, asbestos or diatomaceous earth, and then mixed with acetone to dissolve the acetylene in acetone. Therefore, the acetylene cylinder should not be placed horizontally, and the gas speed should not be too fast to prevent the acetone from being taken out. Acetylene is flammable and explosive, and must be prohibited from contact with fire. Acetylene tubes and joints cannot be made of copper, otherwise a highly explosive copper acetylide will form. The acetylene cylinder is equipped with a special pressure reducing valve with a tempering device. When opening the bottle, do not open the valve fully, generally no more than 1.5 rpm to prevent acetone from overflowing. When the pressure of acetylene in the cylinder is less than 0.2MPa, it can no longer be used. Otherwise, the acetone in the bottle will pass into the flame along the tube, resulting in unstable flame and increased noise, which will affect the accuracy of the measurement. If the acetylene regulator is frozen, it can be warmed by hot air or the like to gradually thaw it, but it can not be directly heated by the flame. In the event of a fire, do not use water or foam fire extinguishers to extinguish with dry powder, carbon dioxide fire extinguishers or dry sand.