Requirements and precautions
The common nature of locks and tags should meet the following requirements.
1. Durable locks and tags shall be able to meet site environmental requirements and remain intact for the maximum expected exposure time. The hangings shall be made and printed to ensure that they are not easily damaged or blurred, especially in corrosive or humid environments.
2. Standard locks and tags shall be standardized in color, shape and size, and the hangings shall be printed in a uniform format and form.
3. Sturdy locks and tags should be strong enough to prevent them from falling off prematurely or accidentally.