If using the traditional welding operation, many of the inner wall of the pipe coating done will be destroyed. So specification galvanized pipes, plastic-lined steel pipe, plastic composite pipe and so should not be used for welding and flange connection, or need secondary treatment. His connection with unique flexible characteristics, so that the pipeline has an anti-vibration, anti-shrinkage and expansion capability, and the flange connection with welding stability as compared piping system is increased, is more suitable for changes in temperature, thereby protecting the pipeline valves, piping stress also reduces damage to structural components. As a concrete pump pipe and concrete pump supporting the use of new construction machinery, like a robot, able to face concrete construction, and accurately reach any part of the work surface of the casting and continuous casting, and give full play the advantages of both technologies, which greatly reduces the labor intensity and cost and improve the progress and quality of construction, by the China Everbright users!