Panjin Shangheng is a gas equipment production, sales, maintenance of machinery manufacturing company. Due to the long-term influence of external factors, corrosion, structural defects, material failure and other effects of the pipeline will produce gas leakage, and the consequences will be unimaginable. Natural gas is mainly composed of methane, with small amounts of ethane and propane. These three gases are flammable and explosive, burning and exploding instantly in the event of high temperature or open flame.