PE steel belt reinforced spiral bellows, polyethylene steel belt reinforced bellows advantages and construction specifications

PE steel belt reinforced spiral bellows, polyethylene steel belt reinforced bellows advantages and construction specifications

PE steel belt reinforced spiral corrugated pipe construction steps: slotting-down pipe-connection-backfill

1. Slotting of steel belt reinforced polyethylene spiral corrugated pipes

1. The pipeline should be laid on the original ground or the compacted ground after slotting. When the pipeline is under the carriageway, the thickness of the top soil of the pipe must be greater than 0.7m. The groove width is better based on the outer diameter of the pipe plus 0.6m.

2. When the pipeline passes through obstacles such as railways and highways, protective sleeves made of reinforced concrete, steel, cast iron and other materials should be installed.

3. During the rainy season, make the tank as much as possible, and fill it back as soon as possible. Once the tank is drained, the water should be drained, and the bubbled soil should be thrown out and replaced with sand and stone.

4. The pipeline adopts sand cushion layer, generally 10 cm sand cushion layer, which is below the groundwater level, and a 20 cm sand gravel foundation should be laid.

Second, PE steel belt reinforced spiral corrugated pipe down pipe and connection

1. For socket installation, the socket should be installed in the downstream direction and in the countercurrent direction from the low point to the high point.

2. The pipeline installation should be manual installation, the length can be cut by hand saw, but the section should be vertical and flat.

3. When working on the interface, the inner (outer) working surface of the socket (socket) should be cleaned, and the center of the socket should correspond to the center line of the floor.

4. When the socket is inserted into the socket, put a wooden baffle on the end of the pipe, use a crowbar to insert the pipeline along the axis into the socket, and install it in sequence one by one. It is strictly forbidden to use construction machinery to directly insert into the socket.

5. Extrusion hot-melt connection is generally used. Both ends are heated by special extrusion welding tools and welding rods to make them melt into a whole. Be sure to align when welding. Leave 1-3mm gap at the welding port for easy welding. The special polyethylene material manufactured with pipe diameter greater than 800mm is welded inside and outside.

6. When the socket adopts socket electric hot melt, the special tools provided by the manufacturer should be used and guided by the technical staff.

3. The connection between the pipeline and the inspection well The flexible connection is used. When the requirements are not high, the pipe is directly built into the well wall

4. Air and water closed test

The tightness test of the pipeline shall be carried out after the bottom of the pipe and the extruded axillary angle are backfilled with sand, and the closed water and closed air test shall be selected according to the site conditions.

5. Backfill of steel belt reinforced polyethylene spiral corrugated pipe

1. The pipeline should be backfilled immediately after passing the installation. For trench backfilling, symmetrical backfilling should be done from both sides of the pipeline, inspection well and other structures at the same time, and necessary limiting measures should be taken to ensure that the structures are not displaced.

2. From the base of the pipe bottom to the top of the pipe 0.7m, it must be manually backfilled. For parts above 0.7m, it can be backfilled from both sides of the pipe axis with machinery, tamping and rolling.

The advantages of steel belt reinforced polyethylene spiral construction:

1. No concrete pipe foundation is needed during use, and it can be excavated, piped down, and backfilled, which greatly shortens the construction period and reduces construction costs.

2. The groove width of the pipeline is reduced by 20% compared with other pipes, and there is no need to slant the wall, which greatly reduces the amount of construction earthwork, saves labor, reduces the difficulty of construction and labor intensity.

3. The pipeline is buried underground. Due to the joint action of the pipe and soil, the pressure resistance of the pipe can be improved. The pipeline backfill must be constructed according to the requirements.

PE steel belt reinforced polyethylene spiral corrugated pipe adopts U-shaped steel belt composite PE material, so that the pipe material can greatly improve the ring stiffness without increasing the cost. Under the same weight, the strength is greatly improved compared with the winding tube and the carat tube. It can solve a series of problems such as heavy load, and the advantages of large-diameter pipes are more obvious. At present, the diameter of production pipes is from DN300mm to DN2400mm, and the ring stiffness is kept above 8KN / m2, which is lighter and stronger than cement pipes and other plastic pipes.

Chinese name Steel belt reinforced spiral bellows Foreign name Steel belt reinforced spiral bellows Short name Steel belt corrugated pipe Steel belt pipe Material used U-shaped steel belt composite PE material

The compounding of the layers is carried out in the molten state of the plastic; it is completely different from the secondary melting of the winding tube (hollow wall tube), so the layers are completely bonded and the fastness is very high.

The surface of the steel strip is specially pre-treated to enhance the corrosion resistance of the steel and the adhesion between the steel and the plastic, and improve the peel strength. When the plastic material is fully melted, it is wound and formed, and the overall structure of the pipe is firm and reliable. Due to the use of special materials and processes, both the corrosion resistance of the steel plate and the adhesion between the steel plate and the PE material are solved, so that the service life of the pipeline is the same as that of the pure plastic pipeline, and it is guaranteed for more than 50 years.

It can be used with electrothermal fusion connection, heat shrinkable tape connection, internal and external extrusion welding or a combination of multiple connections, and the connection is firm. Reliable connection can make the pipeline reach zero leakage.

HDPE steel belt reinforced spiral corrugated pipe, steel pipe pipe characteristics

1. Chemical resistance: not corroded by pollution, waste water and chemicals, and not corroded by rotting substances in the soil;

2. Impact resistance: The wall of the pipe adopts a "U" shape structure, which is resistant to impact and pressure, and does not break when the foundation sinks, and it has strong recovery after deformation and has good adaptability to the foundation;

3. Aging resistance: The pipe is usually black, which can withstand direct sunlight during storage and construction;

4. Cold resistance: the pipe will not be frozen, cracked and swelled in the -60 ℃ environment;

5. Light weight: easy to transport and construction, it is 1/8 of the weight of the cement pipe, buried pipe only needs an excavator, no large equipment;

6. Convenient connection: the pipe can be connected outside the ditch first, and pushed into the ditch with an excavator, reducing the engineering time and cost;

7. Superior wear resistance: more wear-resistant than steel pipes and cement pipes, and strong transportation capacity of domestic water and waste residues;

8. Excellent drainage circulation: smooth inside, reduce friction, and fast drainage speed;

9. Economical: low construction, management and maintenance costs;

10. Environmental impact: HDPE is a non-toxic raw material, harmless to the environment such as land, and can be recycled.

The number of bellows loaded by HDPE double-wall corrugated pipe manufacturers is as follows:

Caliber 6.8 軀

200 6m / root

300 6m / root

400 6m / root

5006 m / root 204060

600 6m / root

700 6 meters per root

800 6 meters / root

Steel belt reinforced polyethylene (PE) spiral corrugated pipe: Steel belt reinforced PE spiral corrugated pipe refers to a high-density polyethylene (PE) as a matrix, and a steel belt coated with adhesive resin on the surface is formed into a wave shape as the main support structure. The double-wall spiral corrugated pipe which is wound and compounded with polyethylene material to form a whole is called steel belt reinforced PE spiral corrugated pipe.

Double-wall corrugated pipe: High-density polyethylene (HDPE) double-wall corrugated pipe is a new type of pipe with a ring structure outer wall and a smooth inner wall. It was first developed successfully 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. In China, the promotion and application of HDPE double-wall corrugated pipes are in an upward trend, and all technical indicators have reached the standard of use.

specification:

Steel belt reinforced polyethylene (PE) spiral bellows: DN300, DN400, DN500, DN600, DN700, DN800, DN900, DN1000, DN1100, DN1200, DN1300, DN1400, DN1500, DN1600, DN1800, DN2000, DN2200, DN2400, DN2600 , DN3000, steel belt reinforced polyethylene (PE) spiral corrugated pipe can produce 3 meters caliber.

Double-wall corrugated pipe: DN110mm, DN125, DN150, DN220, DN225mm, DN250, DN300mm, DN400mm, DN500mm, DN600mm, DN700mm, DN800, DN1000, DN1200 and other specifications products.

Connection method:

Steel belt reinforced polyethylene (PE) spiral corrugated pipe: hot melt extrusion welding, electric hot melt belt connection, heat shrinkable belt connection, clamp connection, combined connection, etc.

Double-wall corrugated pipe: electric fusion connection, socket connection, hot fusion connection.

Material:

Steel belt reinforced polyethylene (PE) spiral corrugated pipe: U-shaped steel belt composite PE material is used to greatly increase the ring stiffness of the pipe without increasing the cost. Under the same weight, the strength is greatly improved compared with the wound pipe and carat pipe.

Double-wall corrugated pipe: HDPE high-density polyethylene

Ring stiffness:

Steel belt reinforced polyethylene (PE) spiral corrugated pipe: the ring stiffness is kept above 12.5KN / m.

Double-wall corrugated pipe: ring stiffness 8KN / m.

performance:

Steel belt reinforced polyethylene (PE) spiral corrugated pipe: good pressure resistance, impact resistance, corrosion resistance, not easy to scale, good economy, good chemical resistance, good aging resistance, and excellent drainage circulation performance.

Double-wall corrugated pipe: corrosion-resistant, not easy to scale but poor impact resistance and pressure resistance.

Environmentally friendly:

Steel belt reinforced polyethylene (PE) spiral corrugated pipe: recyclable, not easy to leak, and little pollution.

Double-wall corrugated pipe: recyclable, low pollution and easy to leak

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Use difference between polyethylene double-wall corrugated pipe for buried drainage and spiral corrugated pipe reinforced with steel belt

Use difference between polyethylene double-wall corrugated pipe for buried drainage and spiral corrugated pipe reinforced with steel belt



1. High ring stiffness

For ordinary buried plastic wall winding pipes, its great ring stiffness is difficult to exceed SN 8, but the new structure of the pipe can easily reach SN8, SN12.5 and SN16, or even higher. Steel belt reinforced polyethylene spiral corrugated pipe

On the other hand, this kind of steel-plastic composite pipe with steel pipe as the middle layer and inner and outer layers of polyethylene plastic is also very good in corrosion resistance. Therefore, this composite anti-corrosion pipe can be applied to various harsh environments. For example, in some coastal areas, since the corrosive substances in the soil will have a short working life if concrete pipes are used, it is desirable to be able to use corrosion-resistant plastic buried drain pipes. But in the past, because there was no product with high ring stiffness that could not meet the design requirements, it is now possible to use metal-reinforced wound structural wall tubes.



2. Material cost savings. In addition to these improved performances, another significant advantage is the material cost savings. Compared with other plastic pipes of the same diameter and ring stiffness, steel belt reinforced polyethylene (PE) spiral bellows can save nearly half of the material cost. Polyethylene only accounts for 2/3 of the total weight of the composite pipe; Under the circumstances, this is a very good solution for reducing material costs.

The ring stiffness achieved when the thin steel strip is pressed into steel ribs far exceeds the effect produced by the very thick polyethylene structural layer. Proper design of the thickness and height of the steel ribs can easily achieve the required ring stiffness. The function of polyethylene in the metal-reinforced winding structure wall tube is corrosion resistance and wear resistance. Therefore, there are not many materials for the steel ribs in the metal-reinforced winding structure wall tube, and there is no need for polyethylene.