What are the measures for inspection and maintenance of storage tanks?

Inspection and maintenance of storage tanks, particularly those for hazardous media, involve strict protocols to ensure safety and compliance. Key measures include:

1. **Fire Safety**: Tanks storing flammable gases or liquids must have firefighting equipment. Open flames, smoking, and heat sources are prohibited near the tank area.

2. **Regulatory Compliance**: Tanks with hazardous materials must adhere to relevant management regulations.

3. **Electrical Safety**: Disconnect all electrical equipment before inspection or repair, and complete equipment handover procedures.

4. **Isolation**: Close inlet/outlet valves or install blind plates after draining the tank, and display clear isolation signs.

5. **Cleaning and Testing**: Tanks with flammable, corrosive, or toxic media must be cleaned, disinfected, and tested post-treatment to meet standards. Air displacement is not allowed for flammable media.

6. **Work Permits**: A tank work permit is mandatory, and a new permit is required if work is interrupted for an extended period.

7. **Oxygen Testing**: Analyze oxygen content (18-23% volume ratio) before entering the tank.

8. **Protective Gear**: Wear appropriate personal protective equipment when cleaning toxic or corrosive residues.

9. **Equipment Safety**: Use sturdy scaffolding and lifting equipment, and avoid throwing tools or materials into or out of the tank.

10. **Lighting**: Use explosion-proof lamps with a maximum voltage of 24V.

11. **Fire Permits**: Obtain a fire permit for work inside the tank.

12. **Supervision**: Work inside the tank must be supervised, with reliable communication methods in place.

13. **Final Inspection**: Maintenance personnel and supervisors must jointly inspect the tank before sealing it.

14. **Pressure Test Draining**: Ensure the tank is connected to the atmosphere during draining after a pressure test to prevent vacuum formation.

These measures ensure the safe operation, maintenance, and integrity of storage tanks.