The GB/T 23711.3-2009 standard focuses on the high temperature resistance test method of fluoroplastic lining Pressure Vessel. It specifies the specifications of test equipment, such as high temperature furnaces, and the test operation process, including heating rate, holding time, temperature monitoring, and observation points of lining state. High temperature resistance performance determines whether the fluoroplastic lining Pressure Vessel can work normally in a high temperature environment. Through this standard, the high temperature resistance of the container can be accurately evaluated, and the production company can ensure the product mass. The fluoroplastic lining remains stable under high temperature conditions. It is widely used in high temperature operations such as chemical industry and energy.