HDPE hollow wall (double wall) winding pipe performance characteristics

2015-5-8 18:37:40

HDPE hollow wall winding pipe (double wall winding pipe) is made of high-density polyethylene material, black and shiny, with light weight, corrosion resistance, anti-aging, anti-leakage, quick installation, medium price characteristics, suitable for residential areas, industrial parks, municipal roads, highways, sewage treatment plants, garbage disposal sites drainage, sewage.

HDPE hollow wall winding pipe (double wall winding pipe) is a chemical drainage pipe, with light weight, corrosion resistance, smooth pipe wall, large flow capacity, good sealing performance, long service life, fast construction speed, convenient transportation and installation characteristics, unit price ranks in the middle of similar products, its cost-effective advantages are as follows:

First, in line with the national environmental protection policy. The state has always emphasized the coordination between economic development and environmental protection, and governments at all levels have incorporated water pollution control into the objectives of the term of office. Polluting industries such as electricity, chemical industry, metallurgy and paper making must meet the emission standards, enterprises that pollute the environment must be resolutely shut down, waste water from the catering and entertainment industry cannot be discharged directly, and domestic sewage in cities and towns can be discharged into rivers after purification and treatment. New projects shall undergo environmental assessment, and projects in areas where water pollution incidents have occurred shall be restricted for approval. Since May 1, 2002, the Ministry of Construction has vigorously promoted the use of buried plastic drainage pipes, prohibited the use of concrete pipes and reinforced concrete pipes, and buried cast iron drainage pipes, determined to control the pollution of underground water sources.

Second, conform to the trend of green environmental protection. With the relocation of enterprises in the city, the relocation of enterprises in the coastal area, and the emergence of third-line enterprises, the process of urban and rural integration has accelerated, and the construction of urban road water supply and drainage network has been carried out everywhere, and sewage treatment plants and garbage disposal sites have been built. The people began to pursue a high-quality living environment after getting rid of poverty and getting rich, the awareness of environmental protection is constantly increasing, the understanding of the defects of traditional sewage pipes is gradually deepening, and the government increasingly hopes to control water pollution and implement rain and pollution diversion. Japan, Europe, the United States and China's Jiangsu and Zhejiang, Shanghai, Dalian, Guangdong and other places, in the 1990s according to 100 years of design standards, a large number of buried double-wall winding pipe, which has become a development direction and trend.

Third, can close the water, no leakage. The hollow wall winding pipe adopts heat shrink connection or electric heat melt connection. The pipe can be cut arbitrarily on site according to the required length. The interface is sealed well, and the sewage in the pipe will not leak and pollute the underground water source, and the stability is good. It has an inner and outer layer (the inner layer bears water pressure, the outer layer bears static earth pressure), the backfill can directly compact the surface of the pipe, can become a surface contact, the pipeline is laid stable, the static earth pressure strength is good, especially at the joint of the pipe well, the water sealing strip can solve the seepage problem of the interface and the joint of the pipe well, and has a unique environmental protection function.

Four, good flexibility, no break. Hollow wall winding pipe is made of high density polyethylene and has double wall hollow I-shape structure and unique flexibility. When the ground settlement or impact is encountered after the pipe is buried, the pipe will not break. When the pipe is subjected to ground pressure, the pipe deformation resilience is strong.

Five, light weight, fast installation. The hollow wall winding pipe is lighter than the cement pipe, convenient transportation, simple connection, smooth outer wall can ensure the ability of the product to resist internal and external pressure, it is very easy to make the backfill soil compact, generally do not use construction machinery construction, saving construction costs. The buried HDPE winding pipe is not subject to weather constraints, and the construction period is more than one-third of the time saved than the cement pipe construction.

Six, corrosion resistance, anti-aging. The hollow wall winding pipe is made of high-density polyethylene as raw material, and the material is sanitary, which determines that the product produced is also non-toxic and harmless, and the acid, alkali and salt in the sewage are not any threat. At the same time, after the installation and burying in the ground, the aging degree is quite slow, and the service life is guaranteed to be 50 years.

7. Economical and cost-effective. The unit price of hollow wall winding pipe is medium, and its usage generally accounts for 1-3% of the total cost of the project, due to the aging is very slow, the service life is long, the usual maintenance cost is quite low, there is no secondary pollution, the environmental benefit is high, and the expected benefit is good, from the total input-output ratio, the user to buy the product is economical and cost-effective.

Precautions for using hollow wall winding pipe

1, the pipe in the loading and unloading transportation stacking process, should be lightly lifted, strictly prohibited throwing, rolling, impact, crashing and heavy pressure, the bottom of the car and pipe contact should be as flat as possible, and there are measures to prevent rolling and collision with each other, shall not contact sharp objects.

2, when getting off, the pipe below DN400 is manually loaded and unloaded, the pipe above DN500 is mechanically loaded and unloaded, and the pipe is lifted with two cloth hanging ropes about 1.4 meters from both ends. It is strictly prohibited to use wire rope or iron wire.

3, the pipe should be placed in the warehouse storage, storage site should be smooth, stacking should be neat, no sharp objects, both sides of the board to prevent sliding, stacking height does not exceed 2 meters, there can be no heavy objects above. Should be away from heat sources and fire prevention measures, open stacking with straw MATS or color strips to block the sun exposure,

4, polyethylene drainage pipe is no pressure pipe, suitable for long-term temperature below 45℃ buried drainage projects, the pressure should be less than 0.05Mpa, should not be used as across the river siphon.

5, the user should be according to the manufacturer's product instruction manual (technical regulations) requirements, excavation trench, production of cushion, artificial backfill compaction and construction of inspection Wells, where there is water and mud should reduce the water level.

6. Before laying pipes, remove water, sand and pebbles in the tank, and put fine soil and sand on the cushion; Lay the pipe on the cushion layer, and manually backfill the top of the pipe with fine soil and sand on both sides to 70 cm before mechanical backfill can be used.

7. The pipes buried under the highway should be filled with concrete first, and then manually backfilled with fine soil and sand. It is strictly prohibited to cross the car without backfilling to the design depth. The spacing of parallel pipelines should be greater than the diameter of pipelines to facilitate the construction of backfill.