concrete pump pipe are generally divided into two types, 125 and 150. These two types have high pressure and low pressure. The low pressure type of the 150 type concrete pump pipe is a pipe with an outer diameter of Φ159, and the high pressure is a pipe with an outer diameter of Φ168. The low pressure type of the 125 type concrete pump pipe is a pipe with an outer diameter of Φ133, and the high pressure is a pipe with an outer diameter of Φ140; the pipe head