Is on-site treatment of the floating roof of large external floating-roof storage tanks in fireproof and explosion-proof areas required at the site?

When carrying out secondary repair and painting of the floating roof of large external floating roof storage tanks in fireproof and explosion-proof areas, the following steps need to be considered: 1. **Safety inspection and assessment**: First, determine the type of oil contained in the tank as well as the gas levels, in order to assess potential hazards. Ensure that all relevant personnel are aware of fire and explosion prevention measures. 2. **Spatial isolation and ventilation**: Use fixed or movable isolation devices (such as partitions) to effectively separate the working area from the remaining oil and gas in the tank. Ensure that the work area is equipped with adequate ventilation to reduce the concentration of flammable gases. 3. **Surface treatment**: Remove the old anti-corrosion coating from the top surface of the floating deck, including loose coatings and rust; this is usually done manually or mechanically (such as by grinding or scrubbing), ensuring that no sparks are generated. 4. **Coating selection**: Choose coatings that are suitable for fireproof and explosion-proof environments and possess good corrosion resistance. For example, water-based coatings or high-solid-content coatings can be used, as they have a lower content of volatile organic compounds (VOCs) and are therefore safer. 5. **Painting operations**: Spark-free tools and equipment should be used for painting operations. The coating can be applied using methods such as brushing or rolling, and spraying equipment should be avoided to reduce the generation of gases and dust. 6. **Safety Monitoring**: Continuously monitor the concentration of combustible gases to ensure it remains within safe limits. Designate dedicated safety supervisors to be responsible for safety oversight and emergency response during operations. 7. **Quality inspection and drying**: After coating, the new coating must be inspected for quality to ensure even coverage and the absence of defects. Allow the coating to dry naturally under safe environmental conditions. By following the above steps, it is possible to ensure the safe and effective completion of the anti-corrosion coating repair for the floating roofs of large external floating roof storage tanks, while meeting strict fire and explosion prevention requirements. .

With such a degree of rust, there’s no need for a second coat of paint; many areas have already been penetrated by rust.