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Classification of locks

Classification of locks

Jul 20, 2019

Classification of locks

1. Working mode of personal locking:

(I) for the operation of a single isolation point, the on-duty squad leader and the person in charge of maintenance shall directly lock the isolation point with their own personal locks.

(ii) for the operation of multiple isolation points, the operator of the workshop belonging to the equipment shall lock all isolation points with collective locks first, and store the keys of collective locks centrally in the lock box after locking, and then the section leader of the workshop belonging to the equipment or the shift leader on duty and the person in charge of maintenance shall lock the lock box with their own personal locks

2. If there is more than one set of collective locks, all the keys shall be placed in the collective lock box, and the key number shall be identified by the staff and corresponding to the on-site safety locks.

Lock and unlock workflow

1. Identify energy sources

The Lockout personnel can understand the power source of the device by reading the sign attached to the device, and obtain the Lockout tagout lock.

2. Inform affected persons

Lock personnel verbally notify affected employees and other personnel, such as operators, cleaners, contractors, etc., working in the equipment area.

3. Turn off the device

Lockup personnel take safe and effective steps to turn off equipment, usually at the console.

4. Disconnect/isolate equipment

After the lockman shuts down the device, operate the power cut-off device to shut down or cut off all power sources.

Lockout tagout Lockout personnel shall lock and tag at each of the Lockout points designated on the sign and fill in the list of Lockout tagout energy isolation points.

Release/control residual energy

Locking personnel ensure that all potential or residual energy is controlled, such as the removal of liquids, gases, etc.

6. Confirm

The lockman checks to see if the device is truly shut down and safe.

7. Remove the lock plate

Lock personnel shall first clear all (maintenance) tools out of the working area of the equipment, restore all safety protection devices to their original position, and then remove their own CARDS, locks and fill in the "unlock record";

Lock personnel verbally inform all affected employees and other employees to terminate the isolation lock process;

Lock personnel must carefully check before starting the equipment to ensure that no one is in the dangerous area.