Dongguan Concrete Pipe Manufacturer - Wholesale Prices - Best Sellers - Installation [Songshulin Environmental Protection Building Materials Co., Ltd.] Concrete pipes are pipes made from batch concrete or reinforced concrete, used for conveying fluids such as water, oil, and gas. They can be categorized into four types: plain concrete pipes, ordinary reinforced concrete pipes, prestressed reinforced concrete pipes, and pre-stressed concrete pipes. Their main feature is the use of self-compacting cement (see special cement) to produce pre-stress through expansion during the hardening process, simplifying the manufacturing process. Compared to steel pipes, concrete pipes can save a significant amount of steel, extend service life, require less investment to establish a factory, and are easy to install, making them widely used in factories, mines, oil fields, ports, urban construction, and irrigation projects. They are used for conveying fluids such as water, oil, and gas. Concrete pipes are divided into four categories: plain concrete pipes, ordinary reinforced concrete pipes, self-compacting reinforced concrete pipes, and pre-stressed concrete pipes. Depending on the inner diameter, they can be small diameter pipes (below 400mm), medium diameter pipes (400-1400mm), and large diameter pipes (above 1400mm). According to the water pressure-bearing capacity, they can be low-pressure pipes and pressure pipes, with working pressures generally at 0.4, 0.6, 0.8, 1.0, 1.2 MPa, etc. Compared to steel pipes, concrete pipes can also be divided into flat-end pipes, socket-and-spigot pipes, and tongue-and-groove pipes based on the type of pipe joint. Their joint forms include cement mortar band joints, wire mesh cement mortar band joints, cement mortar socket-and-spigot joints, and rubber ring socket-and-spigot joints.