Safety precautions during maintenance work

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1. The production unit must create good conditions for safe maintenance. The maintenance unit must obtain the consent of the production unit and shall not dismantle it arbitrarily. 2. The equipment undergoing maintenance must be cut off from the power supply and clearly marked. 3. Temporary lighting for maintenance should use 36-volt safety lights (12-volts are used inside the container), with good insulation, and power tools with reliable grounding wires. 4. Personnel working at heights must comply with the following regulations: 1) Safety nets, protective sheds and other safety facilities must be installed for multi-story crossing operations. Safety helmets must be worn when entering the maintenance site, and safety belts must be fastened when working at a height of more than two meters. 2) People suffering from heart disease, high blood pressure, coma, and epilepsy are not allowed to work at heights. Personnel working at heights should pay attention to overhead power lines and should be at least two meters away from high-voltage lines. 3) Scaffolding must comply with safety regulations. The total weight of materials and workers stacked on the scaffolding must not exceed 270 kg/square meter. On the springboard and hypotenuse of the scaffolding, anti-slip measures must be taken and fences must be tied up. 4) Night operations must have adequate lighting ； During outdoor operations, operations are suspended in strong winds above Level 6. 5. When entering closed containers such as towers, tanks, tanks, etc. for maintenance, special personnel should be assigned to monitor them, a warning sign "Under maintenance, no opening required" should be hung on the relevant connecting valves, and reliable safety measures should be taken. 6. Safety regulations for electrical equipment maintenance: 1) Maintenance of electrical equipment or circuits must be carried out by certified electricians. Before maintenance, detailed inspection must be carried out to confirm that there is no power before work can be carried out. ； Reliable safety measures must be taken when working with electricity. 2) Temporary electrical devices used for maintenance should be grounded in accordance with relevant regulations on production safety. Temporary wires should be erected not less than 2.5 meters from the ground and not less than 5 meters from the ground across highways. 3) Do not use power tools during thunderstorms, in humid places or when your body is wet. 4) When repairing electrical equipment, the power supply should be cut off, and eye-catching warning signs such as "No closing" should be hung on the switch. Outside electricians check whether climbing tools meet safety requirements before climbing to prevent accidents such as broken poles and slides. 5) If electrical equipment catches fire, do not use conductive fire extinguishers. Carbon dioxide and dry powder fire extinguishers should be used to prevent electric shock. 7. Welding work must comply with the following safety regulations: 1) Before starting fire welding, flammable and explosive substances around the fire location must be removed. 2) Keep a distance of 7-10 meters between the acetylene generator, oxygen cylinder and the fire location. The oxygen in the oxygen cylinder should not be used cleanly, and there should be no less than 0.5kg/cm2 residual gas. 3) Do not place oxygen bottles near heat sources. The area must be well ventilated, and collisions are strictly prohibited during transportation. The acetylene generator and safety water seal must maintain appropriate water levels. 4) When welding in a multi-person working place, a screen should be used to prevent the arc from hurting the eyes of others. When welding in humid locations and metal containers, take measures to prevent electric shock. 8. Safety regulations for using cranes, trucks or lifts: 1) The use of cranes, traveling vehicles or lifts must be directed by dedicated personnel, and both operators and commanders should be those who have passed professional examinations. 2) All safety devices must be thoroughly and carefully inspected before lifting. 3) Fences should be set up around the area and "no passage" signs should be hung. Overload lifting is not allowed. It is strictly forbidden for anyone to stand on the lifting object or stay vertically below or pass. 4) When lifting materials and equipment, pay attention to the surrounding environment and do not damage equipment, pipes, wires, etc.