Guangzhou Concrete Pipe Supply, Manufacturer's Supply, Custom Installation, Prices [Songshulin Environmental Protection Building Materials Co., Ltd.] Concrete pipes are pipes made from batched concrete or reinforced concrete, used for transporting fluids such as water, oil, and gas. They are categorized into four types: plain concrete pipes, ordinary reinforced concrete pipes, self-compacting reinforced concrete pipes, and pre-stressed concrete pipes. They are used for transporting fluids. Concrete pipes are classified into four categories: plain concrete pipes, ordinary reinforced concrete pipes, self-compacting reinforced concrete pipes, and pre-stressed concrete pipes. According to the inner diameter of the concrete pipes, they can be divided into small diameter pipes (below 400mm inner diameter), medium diameter pipes (400-1400mm), and large diameter pipes (above 1400mm). Depending on the water pressure-bearing capacity of the pipes, they can be categorized into low-pressure pipes and pressure pipes, with working pressures generally ranging from 0.4 to 1.2 MPa. Compared to steel pipes, concrete pipes, based on the type of pipe joint, can be further divided into flat-end pipes, socket-and-spigot pipes, and tongue-and-groove pipes. Their joint types include cement mortar band joints, wire mesh cement mortar band joints, cement mortar socket-and-spigot joints, and rubber ring socket-and-spigot joints. Their main feature is the use of self-compacting cement (refer to special cement) to produce pre-stress through expansion during the hardening process, simplifying the manufacturing process. Compared to steel pipes, concrete pipes can significantly save steel, extend service life, require less investment to establish factories, are easy to lay and install, and have been widely used in factories, mines, oil fields, ports, urban construction, and irrigation and water conservancy projects in farmlands.