HDPE high-density polyethylene pipe is a modern type of wall pipe with special structure, which is made by a high-density polyethylene hot winding forming process. The products are made of high-density polyethylene resin (HDPE) as raw material, PP or PE corrugated pipe as auxiliary support pipe, and high-density polyethylene large diameter winding reinforced pipe produced by hot winding molding process. Because this kind of pipe was originally developed and manufactured by a German Kra company, the world is commonly known as this kind of pipe for the Kra pipe. The official name of this type of pipe in China is: elevated density polyethylene winding structure wall B type pipe.
The product is an environmental protection and safety product, with light weight, strong bearing capacity, elevated interface quality, long life, corrosion resistance, elevated ring stiffness, convenient construction and additional advantages, widely used in urban water supply, drainage, long-distance water transmission and irrigation projects. Caliber from DN300-DN4000, the pipe weight is light, the overall flexibility is excellent, it is the main pipe of choice for buried sewage drainage.
HDPE winding reinforced pipe industry background
HDPE winding reinforced pipe is a kind of special-shaped wall pipe with a smooth inner wall and screw shaped reinforcing rib outer wall, which is made by spiral winding process and belongs to flexible pipe.
HDPE winding reinforced pipe is made of high-density polyethylene as raw material. It is made by winding forming process in a hot melt state. Before delving in hot state, the pipe is cooled gradually by rolling air cooling, and the wall thickness is uniform. HDPE winding reinforced pipe adopts plug and socket electric fusion connection. Both ends of the pipe are processed into socket and socket during production, and electric fuse is embedded in the socket end. When the pipe is connected, it only needs to access the power supply to complete welding, and it can make the pipe system realize zero leakage.
The product is widely used in urban drainage, municipal drainage, electricity, petrochemical, coal mine ventilation and other fields. It is the ideal replacement of reinforced concrete, cast iron pipe products. At present, as a mature product, HDPE winding reinforced tube has been widely used in foreign countries, and has been rated as a key promotion product by the Ministry of Construction in China.
With the rapid development of our economy, there is more and more investment in pipeline engineering and HDPE pipe fitting suppliers. Every year, the investment of all kinds of pipeline accounts for almost 1/3 of the total investment of national infrastructure. It is an essential part of national infrastructure construction and also the lifeblood of urban and industrial production.
At present, there are numerous kinds of pipes used in China, including eight main pipes: HDPE hollow wall tube, double-wall corrugated tube, common cast iron tube (IP), steel tube (SP), prestressed reinforced concrete tube (PCP), ductile iron tube (DIP), glass FRP, FGP or GRT, and concrete tube steel tube (PCCP) etc. The chemical industry in our country has developed rapidly these years. Because of the excellent performance of the emerging chemical building materials and national policy guidance, the variety of pipes in our country increases considerably, such as tough polyvinyl chloride pipe (UPVC), polypropylene pipe (PP), polybutene pipe (PB), high-density polyethylene pipe (HDPE) and so on. In particular, HDPE winding reinforced tube (HDPE) has been more and more recognized by the market for its excellent product quality.
High density polyethylene (HDPE) winding reinforced tubes are mainly used for:
1. Municipal water supply and drainage: At present, the internal pressure of high-density polyethylene (HDPE) winding reinforced pipe can reach 12kg/cm2, which is the ideal pipe to replace the original cast iron pipe and cement pipe of urban drainage.
2. Large-scale water conservancy projects: long-distance water transmission, farmland irrigation, reservoir pumping and silting.
3. Petroleum industry: oil and gas pipelines.
4, coal industry: coal transport engineering, all kinds of ventilation systems.
5. Chemical engineering: chemical containers, especially corrosive fluid transport pipelines.
6, environmental protection engineering: deep sea sewage, sewage treatment, garbage dump sewage, detoxification pipeline.
7. Power engineering: circulating water pipeline.
8. Laying of pipelines in a corrosive environment.
9. Crossing culverts and pedestrian crossings with large traffic loads such as highways and railways.
10, others: such as deserts, swamps, lakes with fluid transport.
HDPE winding enhanced tube technical performance
HDPE winding reinforced pipe is made of high-density polyethylene (HDPE) as raw material and polypropylene skeleton pipe as auxiliary support. It is wound by multiple layers on the reduced diameter mold to form a pipe with a smooth inner surface and irregular outer surface.
Analysis of market status and development prospect of HDPE winding reinforced tube
Although HDPE winding reinforced pipe has a wide range of uses, this study believes that it is mainly used in municipal, industrial and mining, wharf drainage (including rainwater, sewage), coastal city deep-sea sewage, large-scale water diversion, oil and gas transmission.
As is known to all, no matter industry, agriculture and urban infrastructure construction are inseparable from pipeline engineering. The various water and gas pipelines laid in China every year are calculated by ten thousand kilometers. With industrial development and the expansion of urban construction scale, the requirements for the variety, specification and quality of pipes are constantly on the rise. According to the universal coverage rate of urban sewers is 65% and the urban gasification rate reaches 50%, the total amount of all kinds of pipes is more than 1 million kilometers per year for the construction of urban and rural residential buildings and urban infrastructure alone, and the usage of drainage pipes accounts for more than 30%. In the past ten years, plastic drainage pipes have become the primary choice for urban areas, factories, wharfs, power plants and other infrastructure construction. And the caliber is also developing to large caliber, DN1500~ DN3000 large caliber plastic drainage pipe demand in coastal cities increases year by year.
Government policy-oriented support
After 223 Opinions on Strengthening the Production and Promotion and Application of Chinese Chemical Building Materials issued by five ministries and commissions of the State in 1995, it was definitely pointed out in the document of 154 National Chemical Building Materials Promotion and Application "Ninth Five-Year Plan and 2010 Development Plan Outline" jointly issued in 1997: "Chemical building materials are the fourth type of new building materials after steel, cement and wood. They should be included in the standards and used in engineering design. In particular, we should pay close attention to the pilot application of large-diameter plastic pipes and plastic doors and Windows, do a fine job in technical analysis, summarize the application experience, and promote the popularization and use of large areas with points and areas."
Chemical building materials, due to a wide range of uses, are the most promising and promising products in the building materials industry. The market potential is huge, to plastic generation of steel, generation of cement era has come. At present, after ten years of development, HDPE winding reinforced pipe has been recognized by provincial and municipal projects in coastal areas, and it gradually occupies the market of plastic pipe with its perfect connection mode and large diameter production process.
Current status of winding reinforced tubes
The history of HDPE winding is not lengthy in our country. In 1999, China imported the first set of carat equipment from Germany, and since then, HDPE winding reinforced tube has been applied in China. Due to the Chinese government vigorously promote the development strategy of plastic instead of cement building materials, coupled with the unique advantages of HDPE winding reinforced pipe, The HDPE winding reinforced pipe stands out in all kinds of pipes (HDPE hollow wall pipe, double wall bellows pipe, ordinary cast iron pipe (IP), steel pipe (SP), prestressed reinforced concrete pipe (PCP), ductile iron pipe (DIP), glass steel pipe (FRP, FGP or GRT), steel tube and concrete tube (PCCP). Become the preferred pipeline for key projects.
With the development of China's economy and the current and more stringent environmental protection requirements, the amount of current municipal projects and the old city renovation and other municipal construction projects is increasing, the demand for pipes is strong, and the application prospect of HDPE winding reinforced pipe is broad.
The technology and equipment of this project have been used by numerous countries. The production lines of this technology have been purchased successively by the United States, Japan, Italy, Britain, India, Turkey and other countries, which are widely used in sewage engineering, water transmission engineering, oil transmission engineering and farmland irrigation engineering.