The accident occurred cylinder was heated by direct sunlight and air temperatures. The pressure inside the tank and more. The gas tank was one of the valve spring pressure and leaked through the channel. And spread throughout the area And there are sparks caused by static electricity. Causing flames spread quickly because the area of the cylinder's propane propylene and ethylene processing is a lot. It also caused a violent explosion at the gas tanks, some flying as far as 800 feet in places in communities, the damage is broad.