DN2600 crossing the Beijing Capital International

Airport Expressway

The development of pipe and culvert production technology in China has greatly improved the output, quality, varieties and specifications of pipes. At present, of all the pipe-making processes in the world,  centrifugal casting process, suspension roller molding process, core mould vibration molding process, radial extrusion pressing molding process, vertical vibration molding process, etc., have all been owned and localized in China, reached the advanced level in the world and still keep improving.

Driven by national policies such as "supply-side structural reform drives industry innovation and development", "Made in China 2025 leads industry development" and "urban infrastructure construction provides new development space for the industry ", cement concrete pipe and box culvert industry keeps a good momentum, and the industry scale, product specifications, technological innovation and equipment have made great strides towards the world advanced level.

Process technology: 

The largest specification for manufacturing and application of reinforced concrete drainage pipes in China is Φ4400mm, φ4,000 mm large diameter reinforced concrete pipes and rectangular box culverts over 7m have been widely used in utility tunnel, power tunnels and subway tunnels across the country; With national low-carbon environmental protection requirements and labor cost increased, core mould vibration molding process and radial extrusion pressing molding process among the main technologies have become the leading production processes. In addition to ordinary reinforced concrete pipe and box culvert, there are also composite pipes with various lining materials, which is the need of anti-corrosion and pollution control. Various special-shaped pipes (oval, multi-arc pipes with base) and extended prefabricated components (prefabricated reinforced concrete inspection wells, prefabricated reinforced concrete septic tanks, ecological slope protection bricks, ecological permeable bricks, fabricated cable trenches and fabricated fences) are constantly designed and developed; Jacking construction technology is being widely used in engineering. 

The completion of Guangzhou pipe rack

China boasts a complete series of main pipe and box culvert products in the world.

Product type:

In addition to ordinary concrete circular pipes, there are various special-shaped pipes and rectangular pipes (box culverts); Structure: In addition to ordinary reinforced concrete pipe and box culvert, there are composite pipes with various lining materials; Types of interfaces: flexible interfaces with rubber rings and rigid interfaces without rubber rings. At present, flexible interfaces have basically replaced rigid interfaces. Extended prefabricated component products: prefabricated reinforced concrete manhole, prefabricated reinforced concrete septic tank, ecological slope protection brick, ecological permeable brick, fabricated cable trench, fabricated fence and other components.

Radial extrusion process drain pipes

Equipment technology:

During “The thirteenth Five-Year Plan”, the technologies of China's drainage pipe forming equipment developed rapidly, becoming a manufacture of all kinds of advanced pipe and box culvert equipment in the world. The localized advanced equipment is not only used in China, but also started to be exported to foreign countries.

 Core mold vibrating pipe making machine

With the strengthening of national energy-saving and environmental protection policies, cement concrete pipe and culvert is gradually forming a production pattern based on core mold vibration technology and vertical radial extrusion technology, thus promoting the optimization of technical performance of core mold vibration pipe-making equipment and radial extrusion pipe-making equipment. For example, the R&D of lifting core mold vibration pipe-making machine is the technical upgrade and innovation of core mold vibration pipe-making equipment. The R&D and application of numerical control steel mesh welding production line and the vertical steel mesh bending machine have further improved the automation technology and production efficiency of pipe and box culvert manufacturing. Compared with the traditional centrifugal process and suspension roller process, these equipment have higher mechanization and automation, lower labor intensity and higher production efficiency. However, compared with foreign similar equipment, there is still a certain gap in material performance, automation degree, especially precise operation and strict management. To truly realize "the display of technological characteristics plus technological progress of equipment plus reasonable application equals perfection", the joint efforts of the whole industry are needed.

Radial extrusion pipe making machine

HGZ440 push bar type seam welder 

"2021-2022 China Concrete Exhibition" (March 30-April 01 2022 in Nanjing, Jiangsu Province) has a special exhibition area for intelligent innovative equipment and high-performance technology products of cement concrete pipes and box culverts. Leading enterprises in Qingdao Hicorp Group Heavy Industry Science & Technology Co., Ltd, Suzhou Kexing Concrete and Cement Product Equipment Co., Ltd., Yangzhou Huaguang Shuangrui, Jiangsu Huaguang Shuangshun Group, Sichuan Just Rubber Co., Ltd., Jiangsu Jiangyang Building Materials Machinery Co., Ltd.,  Jiangsu Zhongyi, Jiangsu Weiziman Machinery Co., Ltd., Jiangsu Bangwei Machinery Manufacture Co., Ltd., Henan Jingcheng Mould, Jiangsu Sinoer Building Materials Equipment Co., Ltd., Dongguan Dianshi PVC and other industries will bring new products and technologies to the exhibition.

During the exhibition, many activities such as new products, new technology promotion activities, expert consultation, case analysis forum and small forums in the booths of leading enterprises in the industry will be held in pipe and box culvert exhibition area every day, bringing the audience the latest equipment, technology and applications leading in the industry in recent years.