The double-wall corrugated pipe is a new type of pipe with a ring-shaped outer wall and a smooth inner wall. It was first developed in Germany in the early 1980s. After more than ten years of development and improvement, it has evolved from a single variety to a complete product line. At present, the production process and the use technology are very mature. Due to its excellent performance and relatively economical cost, it has been greatly promoted and applied in developed countries such as Europe and the United States. In China, the promotion and application of HDPE double-wall corrugated pipe is in the rising stage, and all technical indicators have reached the use standard.
First, the advantages of double-wall corrugated pipe
1, the structure is reasonable and beautiful
2, temperature resistance -40 ° C -60 ° C
3, the resistance is small, the flow is large
4, strong flame retardant
5, long service life
6, reliable health performance
7, the overall cost is low
8, acid and alkali corrosion resistance
9, high strength, strong seismic performance
10, energy saving, easy to install and transport
Second, the characteristics of double-wall corrugated pipe
The double-wall corrugated pipe is formed by high-density polyethylene by simultaneous extrusion of the corrugated outer wall and a smooth inner wall. The characteristics of the double-wall corrugated pipe are also obvious, mainly the following:
1. High strength, good pressure resistance and impact resistance;
2. Good anti-settling performance, applicable to soft soil quicksand foundation;
3. Easy to connect, no leakage of joints;
4. The inner wall is smooth, the friction is small, and the water passing capacity is strong;
5. Corrosion resistance and no pollution.
6. Light weight, easy to handle, convenient construction, low comprehensive engineering cost.
Third, the characteristics of double-wall corrugated pipe:
1. Unique structure, high strength, resistance to pressure and impact; smooth inner wall, small friction and large flow; easy connection, good joint sealing, no leakage;
2, light weight, fast construction, low operating costs, reduce costs;
3. Polyethylene is a hydrocarbon polymer, the molecule is non-polar, resistant to acid and alkali corrosion; the buried life is more than 50 years; the raw material is green environmentally friendly material, non-toxic, non-corrosive, non-fouling, and can be recycled and reused;
4, the applicable temperature range is wide, the pipe does not break in the environment of -60 ° C, the maximum temperature of the transport medium is 60 ° C;
5, has a good rapid crack transmission resistance, high stress crack resistance and low scratch sensitivity;
6. High-toughness pipe, the elongation of fracture exceeds 500%, and it has strong adaptability to uneven settlement of pipe foundation; if the soil quality is good, there is no need for foundation.
Fourth, the application range of double-wall corrugated pipe
Double-wall corrugated pipe has become the preferred pipe for “plastic-made steel†in the pipeline field. It overcomes the shortcomings of difficult installation, corrosion resistance, large water flow resistance, bacterial growth and short service life of cement pipes, ceramic pipes and cast iron pipes. So the scope of application is very broad, mainly reflected in:
1. Municipal engineering, residential areas buried underground rainwater, sewage discharge;
2. Farmland water conservancy irrigation, water drainage, drainage;
3. Drainage and transportation of sewage treatment plants and garbage disposal sites;
4. Highway buried pipeline;
5. Chemical ventilation pipe and chemical, mine for fluid transportation;
6. Power, communication cable protection sleeves, etc.
7. Overall inspection of the pipeline inspection well.
Five, double wall corrugated pipe specifications:
Unit: mm
Nominal inner diameter DN/ID minimum average inner diameter din.min minimum laminated wall thickness e.min minimum inner wall thickness e1.min joint length A.min
2252201.71.455
3002942.01.764
4003922.52.374
5004903.03.085
6005883.53.596
8007854.54.5118
10009855.05.0140
120011855.05.0162
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