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At 10:50 on February 10, when a factory owner in the Economic Development Zone of Puchun County, Huanggang City, Hubei Province, was cutting the waste oil tanks blocking the road in the outdoor waste accumulation area of the factory building, due to improper operation, sparks ignited the internal residual oil pollution and caught fire, and the smoke at the scene was billowing and the fire was fierce. Firefighters arrived and immediately used two foam guns to extinguish the fire from both sides of the tank, and after 30 minutes of fire fighting and rescue, the open fire at the scene has been basically extinguished. Due to the complex internal structure of the tank, the foam could not be fully penetrated, in order to prevent re-ignition, firefighters disassembled the tank and continued to cool down and clean. Fire department tip: containers filled with flammable, explosive and harmful substances have not been thoroughly cleaned, not tested for flammable concentration, not welded, not cut. At the same time, before welding operations, it is necessary to understand the surroundings and clean the flammable and combustible materials near the welding construction site to reduce the danger in the workplace and prevent problems before they occur. (Source: Huanggang Fire)