Introduction to the

PE double wall corrugated pipe is a kind of polyethylene as the raw material, after extrusion and special molding process, the inner wall is smooth, the outer wall is closed corrugated type of a new lightweight pipe.

Research and development process

It was first developed in Germany in the early 1980s. after more than ten years of development and improvement, it has developed from a single variety to a complete product series. at present in the production process and use of technology has been very mature. Because of its excellent performance and relatively economical cost, it has been greatly promoted and applied in Europe and America and other developed countries. in our country, the promotion and application of PE double wall bellows are in the rising trend stage, the product by the national chemical building materials testing center identification, the technical indicators have reached the use standard.

Advantages of folding pipe

PE double-wall corrugated pipe has light weight, high pressure resistance, toughness good, fast construction of long life and other characteristics, in addition to the ordinary plastic pipe has good corrosion resistance, high insulation, the lining is smooth, small flow resistance, and other characteristics, also because of the special hollow ring structure, excellent ring stiffness and good strength and toughness, and light weight, strong resistance to impact, Not easy to damage and other characteristics. at present, it has been widely used in many fields in developed countries, especially in the United States, Canada, Japan and many Countries in Europe. Double-wall bellow pipe is widely used in municipal drainage and sewage, agricultural irrigation, coal mine ventilation, chemical industry, communication cable sheath and other fields. Practice has proved that under satisfies the requirement of the engineering application of strength and stiffness, the double-wall corrugated pipe structure can save raw materials by 30% to 50%, in addition, compared with concrete pipe, cast iron pipe, transportation convenient installation, reduce the workers labor intensity and reduce the advantages of the project total investment, double-wall corrugated pipe has become a field of pipeline "with plastic instead of steel" choice of tubing, It overcomes the concrete pipe, cast iron pipe and other difficult installation, easy to rust, water resistance, breeding bacteria, short life shortcomings.

Production line process

Because PE double-wall bellows are large caliber type specifications, extrusion molding with more raw materials, so the general manufacturers are using twin screw extruder (parallel or conical twin screw extruder can be applied), PE double-wall bellows molding process is mainly through pipe forming, pipe cutting and flaring three technological processes, the details are as follows

Folding pipe forming process:

after mixing sieve powder - feed to extruder - extruder heating plasticizing - extrusion head shunt - compression into double thin-walled tube - blown by compressed air between modules and sizing chambers - inner and outer wall forming - cooling water sequence is set - continuous traction pipe stripping

Folding pipe cutting process:

Molding machine uniform tube out - cutting machine clamp and peer - cutting knife spiral and feed - cutting pipe - cutter head reset - fixture release reset - car back to wait for the next instruction

Folding product model:

1, S1 type (ring stiffness ≥4KN/)2, S2 type (ring stiffness ≥8KN/) pipe design selection, generally speaking, no dynamic load or pipe buried in about 0.7-5 meters, choose S1 type; S2 type is used when there is dynamic load or the buried depth of pipe is too shallow or too deep. in case of special circumstances, it may be necessary to communicate with relevant professional engineers to ensure the safety and reliability of pipe selection.

Folding product specifications:

DN110mm, DN125, DN150, DN220, DN225mm, DN250, DN300mm, DN400mm,DN500mm, DN600mm, DN700mm, DN800, DN1000, DN1200 and other kinds of specifications products.

Product technical features

1, unique structure, high strength, compression and impact resistance.

2, the inner wall is smooth, friction resistance, large flow.

3, convenient connection, good sealing joint, no leakage.

4, light weight, fast construction, reduce costs.

5, buried service life of more than 50 years.

6, polyethylene belongs to hydrocarbon polymer, molecular non-polarity, acid and alkali corrosion resistance.

7, raw materials for green environmental protection materials, non-toxic, non-corrosion, no scaling, can be recycled.

8, the applicable temperature range is wide, the pipeline does not break in the environment of -10℃, the highest temperature of the transmission medium is 40℃.

9, the comprehensive project cost and concrete basic equivalent, low operating cost.

10, good soil without foundation.

Range of application

Drainage and ventilation pipes of mines and buildings;

Municipal engineering, residential district underground drainage, sewage pipe;

Irrigation water conservancy, drainage water; Sewage treatment plant, waste treatment plant drainage pipe;

Chemical ventilation pipe and chemical, mine for fluid delivery pipe;

Overall processing of pipeline inspection Wells; Highway embedded pipeline;

High voltage cable, post and telecommunications cable protection bushings

Technical indicators

Products are manufactured according to GB/T19472.1-2004 "Buried Polyethylene (PE) Structure Wall Piping System" requirements; PE double wall bellows mainly have ring stiffness for SN4, SN8 grade products. the color of the product is usually black, which can also be agreed by both parties. the inner diameter of the pipe is DN22 5-DN1200. the length of the pipe is generally 6M