Tank Cleaning and Safety Procedures
Pre-emptive Ventilation
- Completely empty the tank of residual gasoline using appropriate transfer equipment.
- Close relevant valves and ensure proper isolation to prevent backflow of other media.
- Open the manhole cover and vents, and use explosion-proof ventilation equipment.
- Accelerate airflow to reduce the concentration of gasoline volatiles inside the tank.
- Strictly prohibit proximity to open flames, electrical sparks, or other ignition sources.
- Unauthorized operations are prohibited in the surrounding area to ensure environmental safety.
Safe Cleaning Method
- Use a dedicated cleaning solvent compatible with gasoline.
- Avoid using easily reactive chemical agents that could cause dangerous reactions.
- Evenly spray or apply the cleaning solvent to the inner wall of the tank.
- Allow sufficient soaking time to soften the residual oil film and deposits.
- Gently wipe manually with explosion-proof tools to remove adhering residues.
- Avoid vigorous friction that generates static electricity during cleaning.
- Focus on cleaning welds, joints, and the bottom where residue accumulates.
Enhance Residual Gas Replacement
- After cleaning, replace residual gasoline volatile gases using an inert gas.
- Slowly introduce the gas into the tank to gradually expel the flammable gases.
- Maintain unobstructed ventilation throughout the replacement process.
- Ensure sufficient gas flow and eliminate any dead zones in the tank.
- Monitor gas concentration using professional testing equipment.
- Continue ventilation until flammable gas concentration meets safety standards.
- Continue ventilation after replacement to ensure fresh air inside the tank.
Standardize Safety Protection and Disposal
- Operators must wear anti-static clothing, protective gloves, and respirators.
- Avoid direct contact with residual gasoline or inhalation of volatile gases.
- Place oily waste in sealed containers for professional disposal.
- Prohibit random dumping that may cause environmental pollution.
- After treatment, thoroughly inspect the inner wall for oil stains and odors.
- Seal the tank interfaces after confirming there are no residues.
- Maintain accurate records of the treatment process and test results.
Critical Safety Measures
Explosion-Proof Equipment
Use only certified explosion-proof ventilation and cleaning tools
Gas Monitoring
Continuously monitor flammable gas concentrations during all operations
Proper PPE
Require anti-static clothing, respirators, and protective gloves
Waste Management
Securely contain and professionally dispose of all cleaning waste
Conclusion
Proper tank cleaning and safety procedures are essential for preventing accidents and ensuring operational safety. The four-step process of pre-emptive ventilation, safe cleaning methods, residual gas replacement, and standardized safety protection provides a comprehensive approach to tank maintenance. Strict adherence to these protocols, proper use of equipment, and thorough documentation are critical for maintaining a safe working environment and preventing hazardous incidents.