What is a plastic pipe? Plastic pipes can be divided into polyvinyl chloride (PVC) pipes, polyethylene (PE) pipes, polypropylene (PP) pipes, polybutene (PB) pipes, ABS pipes, etc. according to materials; PVC, PVC-U, PVC-C, suitable for bonding, rubber ring flexible connection) and polyolefin materials (PE, PP, PB, suitable for hot melt, electrofusion connection); according to the structure of the pipeline (and Caliber), mainly divided into solid wall pipe, bellows (single wall, double wall), reinforced pipe, winding pipe, core layer foam pipe, inner spiral pipe and other structures; according to the application field, mainly divided into outdoor water supply pipes, Building water supply pipes, building drainage pipes, buried drainage pipes, gas pipes, sheath pipes, agricultural pipes, industrial pipes, etc.

So where can different plastic pipes be used? We use the following table to briefly explain:

Why can PE pipes replace traditional transport pipes? The HDPE piping system has the following advantages:

1. Reliable connection: The polyurethane insulation pipe system is connected by electric hot-melt method, and the strength of the joint is higher than the strength of the pipe body.

2. The low temperature embrittlement temperature of polyurethane insulation pipe is extremely low, and it can be safely used in the temperature range of -60-60 °C. In winter construction, due to the good impact resistance of the material, the tube will not be brittle.

3, good resistance to stress cracking: HDPE has low notch sensitivity, high shear strength and excellent scratch resistance, and environmental stress cracking resistance is also very prominent.

4, good chemical resistance: HDPE pipeline can withstand the corrosion of a variety of chemical media, the chemical substances in the soil will not cause any degradation of the pipeline. Polyethylene is an electrical insulator and therefore does not rot, rust or electrochemically corrode; it also does not promote the growth of algae, bacteria or fungi.

5. Anti-aging, long service life: Polyethylene pipes with 2-2.5% evenly distributed carbon black can be stored or used outdoors for 50 years without being damaged by UV radiation.

6. Good wear resistance: The comparison of wear resistance of HDPE pipe and steel pipe shows that the wear resistance of HDPE pipe is 4 times that of steel pipe. In the field of mud transport, HDPE pipes have better wear resistance than steel pipes, which means HDPE pipes have a longer service life and better economy.

7. Good flexibility: The flexibility of the HDPE pipe makes it easy to bend. In engineering, the obstacle can be bypassed by changing the direction of the pipe. In many cases, the flexibility of the pipe can reduce the amount of pipe fittings and reduce the installation cost.

8. Low water flow resistance: The HDPE pipe has a smooth inner surface with a Manning coefficient of 0.009. The smooth performance and non-adhesive properties ensure that the HDPE pipe has a higher conveying capacity than conventional pipes, while also reducing the pressure loss and water consumption of the pipe.

9. Convenient handling: HDPE pipes are lighter than concrete pipes, galvanized pipes and steel pipes. They are easy to handle and install. The lower manpower and equipment requirements mean that the installation cost of the project is greatly reduced.

10, a variety of new construction methods: HDPE pipeline has a variety of construction techniques, in addition to the traditional excavation method for construction, you can also use a variety of new non-excavation techniques such as pipe jacking, directional drilling, liner Construction in the form of split pipes, etc., is the only option for some places that are not allowed to be excavated, so the application of HDPE pipes is more extensive.

What is the current status of PE pipeline industry development? We have organized the following seven aspects:

1. Strong production capacity, increasing number of large-scale enterprises, and increasing industrial concentration

There are more than 3,000 large-scale plastic pipe production enterprises in China, with an annual production capacity of more than 15 million tons, the overall growth rate of the industry is more than 10%; about 300 enterprises with an annual production capacity of 10,000 tons, and more than 20 enterprises with an annual production capacity of more than 100,000 tons. The sales volume of plastic pipes in the top 20 enterprises in the industry reached more than 40% of the total industry.

2. The quality and quality of the development of the industry continue to increase, and the competition among brand enterprises is more intense.

The research and development speed of new materials and new varieties has accelerated, and the investment in technology and equipment has increased. The awareness of consumers and industry brands has increased, making competition among brand enterprises more intense.

3. The materials, structures and types of products are increasingly rich, and the application fields are expanded.

Plastic and plastic, plastic and metal composite pipes develop rapidly, cross-linked polyethylene (PE-X), ultra high molecular weight polyethylene (UHMW-PE), heat resistant polyethylene (PE-RT), modified polychlorinated The amount of plastic pipe used in ethylene (PVC-M) and other materials has also increased greatly; in the product structure, the pipes of the solid wall pipe, bellows, ribbed pipe, winding pipe, core foam pipe, inner spiral pipe, etc. There are production applications; the main applications of the products gradually expand from the fields of infrastructure construction such as supply and drainage, gas, heating and communication to industrial applications such as chemical, electric power and mining, and non-excavation construction.

4. The production enterprises are still mainly concentrated in economically developed areas, but the flow to the central and western parts is obvious.

Plastic pipe production enterprises are still mainly concentrated in coastal and economically developed areas. At present, the sum of production in Guangdong, Zhejiang and Shandong provinces has exceeded one-third of the national total, but there is a gradual decline. As the market demand in the central and western regions increases, the signs of new capacity to flow to the central and western parts are obvious.

5. Emphasis on technological progress, the overall technical level of the industry

Leading enterprises such as Weixing Building Materials are paying more and more attention to the introduction and development of new products, new technologies and new equipment, and promoting product performance improvement and application field development;

According to incomplete statistics, China's plastic pipe industry has more than 1,000 patent technologies in the international leading position, in ultra-high molecular weight polyethylene (UHMWPE) pipe, large-diameter drainage steel-plastic composite winding pipe, plastic and metal composite pipe, etc. With advanced level.

6. The product quality level and brand awareness of key enterprises are gradually improved

The industry and key enterprises have improved their awareness of product quality, driving the overall improvement of product quality in the industry, and quality qualified products have become mainstream.

At present, 12 companies have won the title of “China Famous Brand Product”, and more than 20 enterprises have won the honor of “China Famous Brand”. The number of local famous brands has increased, and the awareness of industry brands has gradually improved.

7. Product exports increased, and the trend of internationalization gradually strengthened

With the increase of production and quality levels, China's plastic pipe processing enterprises have a strong desire to “go global”. Some export-oriented enterprises have increased their export volume and export volume in recent years, and their share in total and export unit prices have risen. Trends, products are mainly exported to Southeast Asia, the Middle East, Africa, the Americas and Europe and other countries and regions.

How will the industry develop in the future? We have explained the development trend of plastic pipes from the following four aspects:

1. Plastic pipe has a wide market space in various application fields:

The expansion of underground pipe network, urbanization, construction of rural water supply facilities, construction of sewage treatment facilities and other fixed assets continued to grow;

The construction of supporting facilities for large-scale projects such as the rapidly growing power industry (nuclear power, thermal power), petrochemicals, and integrated transportation hubs;

Increased penetration of gas pipes and replacement of traditional steel pipes;

The cable production is rapidly increased and the demand for the jacket tube is pulled.

2. Increasing emphasis on technological innovation, product performance and technical level continue to improve, new varieties, new materials, new structures, new technologies, new processes continue to emerge

Many companies value international cutting-edge technology and continuously strengthen the research and development of new products. Some large enterprises have their own research and development centers. The gap between technology level and developed countries is gradually narrowing, and new varieties, new structures, new materials, new technologies, new processes and patent projects of plastic pipes are gradually increasing.

The pace of new materials is being upgraded to increase the strength, toughness and functionality of the materials.

Rapid development of plastics and metal, fiber and other materials pipeline technology to optimize the performance of the pipeline and broaden the application field;

Pipeline processing technology continues to improve, and automation, online detection and control levels will become higher and higher;

The trend of pipeline systemization is obvious, and the requirements for its supporting capacity and system design capability are increasing.

3. Brand competition has become the dominant direction of market competition

With the development of economy and the improvement of consumption level, the requirements of ordinary consumers for the hygiene, energy saving and environmental protection of plastic pipe products will be higher and higher, and the brand and quality requirements for products will be higher. With the completion of the layout of some large enterprises in the domestic market, the competition in the plastic pipe market will gradually rise from a single price competition to brand competition. Especially when the cost of raw materials rises, the trend of such brand competition will become more apparent.

4. Regional development is increasingly balanced

With the development of the central and western regional economy, the original Dongqiang West weak situation of plastic pipe production has improved, and the investment of various enterprises in the central and western regions has increased, and some national companies have emerged.