Safe production is the top priority of enterprise production management. Doing a good job in safe production can not only effectively guarantee the safety and health of employees, but also better maintain the survival and development of the enterprise. According to statistics, about 10% of the world's current workplace safety accidents are caused by dangerous energy not being effectively controlled. Accidents not only cause injuries to the safety of workers, but also easily damage machinery and equipment, resulting in the shutdown of factories, affecting the benefits of enterprises. The research shows that through strict compliance with Lockout tagout system in production debugging, the dangerous energy can be effectively controlled and the incidence of safety accidents can be reduced by 30%~50%.
Lockout tagout has been paid attention to in foreign countries for a long time. Various countries have formulated relevant regulations and standards. Meanwhile, these regulations are also highly valued by enterprises and employees and strictly implemented in production. In China, due to the relative lack of enterprise management and the lack of safety awareness of the staff, the locking and listing system is not well implemented, so that the production accident rate is high.
Lockout tagout is a method of preventing personal injury by isolating and targeting certain dangerous energy sources in accordance with occupational safety and health standards. Among them, the dangerous energy source mainly refers to a kind of energy that will cause harm or damage when it is suddenly opened or released, including electric energy, mechanical energy, hydraulic energy, chemical energy, radiant energy, heat energy, kinetic energy, energy storage and potential energy. So required equipment, mechanical, electrical, hydraulic or pneumatic system in installation, maintenance, operation, debugging, the process of inspection, cleaning and maintenance, staff shall strictly implement Lockout tagout procedures, abide by the power equipment, machine of accidental start, to prevent the release of the dangerous energy, causing injuries and property losses.
2 lockout tagout procedures
Hold the report meeting before the start of construction, clearly control the form, scale, risk, installation and corresponding inspection steps of energy, register in the equipment that needs to be locked and fill in the Lockout tagout work order. The authorized person notifies all affected persons in the lock area.
Authorized personnel to shut down and test machines and equipment and conduct planned parking to avoid additional risks.
3) the isolation
Close the switch, valve and other isolation device, the dangerous energy isolation, in order to avoid dangerous energy connected to the machine, equipment, if the conditions permit, but also as far as possible to set off the physical railing.
4) energy release
The storage and remaining energy must be safely released or eliminated, checked continuously until the operation is completed, so that there is no possibility of energy accumulation, reaching a zero energy state.
4) Lockout tagout
Authorized personnel shall put the equipment that has been isolated on the lock list and register it on the work order. No one shall attempt to operate switches, valves or other energy isolators under the lock control state. Removing someone else's padlock badge is equivalent to removing the padlock and prohibiting similar behavior. Uniform specification identification plates should be used with the following information: unauthorized use of locked equipment or machines is prohibited; Do not remove the sign; Owner, date, and reason for listing. The sign should be hung firmly to ensure that it will not fall off easily or be accidentally knocked off by the staff.
After making sure that all the people are far away from the designated machines and equipment, the authorized personnel shall carry out normal operation test and confirm that the power supply of the machines and equipment requiring lock control has been cut off and cannot work.
Carry out installation, maintenance, cleaning and other construction work.
8) unlock the card
Before the Lockout, the Lockout tagout shall check the equipment and area he/she is responsible for, confirm that the relevant work of the machine and equipment has been completed, and then remove the Lockout and sign and register in the work order. When there is a special situation that cannot get in touch with the dismissed personnel, the supervisor shall complete the inspection work on their behalf. After repeatedly confirming that there is no problem, the debugging manager can order the lock and mark to be cut or destroyed, and report to the site manager after thoroughly investigating the cause of the incident.
9) equipment testing
Unlock the card to restore the power supply of the device, test its operation status, notify all relevant personnel to be ready, among which there should be a person in the power supply room responsible for coordinating all operations and performing downtime. The entrance and exit of the electrical room shall be controlled, and only authorized personnel labeled on the debugging license shall be allowed to enter.
10) resume production
After the equipment is tested without any exception, start the equipment according to the program and resume production.