The steel belt reinforced polyethylene (PE) spiral corrugated pipe is a new type of bellows with high-density polyethylene as the basic material, the outer layer is spirally wound in the wall layer, and the steel plate is reinforced with hollow ribs. In addition to the corrosion resistance, smooth inner wall and low flow resistance of ordinary plastic pipes, it has a steel ring as a hollow surrounding structure of the reinforcement, so it also has a ring degree of more than 12.5KN/m2 (spiral winding). Hollow wall polyethylene can only reach 8KN/m2 ring steel) and high strength and toughness, light weight (40% lighter than spiral wound hollow wall polyethylene pipe), impact resistance, not easy to break, no leakage, etc. Features, so it is widely used in drainage, sewage, agricultural irrigation, coal mine ventilation, chemical, communications cable sheathing and other fields. Because of its light weight and convenient transportation and installation, it reduces the labor intensity of construction workers and reduces the cost of the project. It is an ideal substitute for concrete pipes and traditional drainage plastic pipes.
Steel belt reinforced polyethylene (PE) spiral corrugated pipe has the advantages that traditional metal pipe and concrete pipe are incomparable. It has the characteristics of acid and alkali corrosion resistance, water flow erosion resistance, strong anti-seismic and anti-freezing performance, high light weight and high strength (8-16KN/m2), strong anti-pressure and anti-settling performance, no leakage, convenient installation and long service life. The product can be used for soft soil quick-sand foundation, convenient connection, no leakage of joints, no secondary pollution, widely used in urban community sewage, municipal sewers, agricultural irrigation and other fields. The inner wall of the product is smooth, the friction is small, the water passing capacity is 40% larger than other pipes; corrosion-resistant, non-polluting, light weight, large-scale equipment is not required for transportation and installation, the engineering comprehensive cost is low, the service life is long, and the life under normal use can be Up to 50 years.
Production Process
The steel belt reinforced polyethylene (PE) spiral corrugated pipe is made of high-density polyethylene (PE), and is formed by a steel strip coated with a resin on the surface as a main support structure, and is entangled with a polyethylene material to form a whole body. Double wall spiral bellows.
Standard sizes
| Nominal inner diameter (mm) | Minimum average inner diameter (mm) | Minimum steel strip thickness (mm) | Length (mm) | Remarks |
| 300 | 294 | 0.4 | 10000 12000 | Note: The length of the pipe can also be based on the contract between the supplier and the buyer. The pipe length is not allowed to have a negative deviation of more than 1/2 pitch. |
| 400 | 392 | 0.4 | ||
| 500 | 490 | 0.5 | ||
| 600 | 588 | 0.5 | ||
| 700 | 673 | 0.5 | ||
| 800 | 785 | 0.7 | ||
| 900 | 855 | 0.7 | ||
| 1000 | 985 | 0.7 | ||
| 1100 | 1085 | 0.7 | ||
| 1200 | 1185 | 0.7 | ||
| 1300 | 1285 | 1.0 | ||
| 1400 | 1385 | 1.0 | ||
| 1500 | 1485 | 1.0 | ||
| 1600 | 1585 | 1.0 | ||
| 1800 | 1785 | 1.0 | ||
| 2000 | 1985 | 1.0 | ||
| 2200 | 2185 | 1.2 | ||
| 2400 | 2385 | 1.2 |
Nominal ring stiffness rating
level | SN8 | SN10 | SN12.5 | SN16 |
Ring stiffness (KN/m2) | ≥8 | 10≥ | ≥12.5 | ≥16 |
Performance comparison
Performance comparison between steel belt reinforced polyethylene (PE) spiral corrugated pipe and spiral wound hollow wall pipe and concrete pipe
Tube performance | Steel belt reinforced polyethylene spiral bellows | Spiral wound hollow wall tube | Concrete pipe |
Pipe | Flexible pipe | Flexible pipe | Rigidity |
Structural characteristics | Deformation and movement without damage to the structure under load | Deformation and movement without damage to the structure under load | Very little deformation under load |
Ring stiffness | 8-16kn/m2 | ＜8kn/m2 | ≥10kn/m2 |
Connection method | Haval piece, heat shrinkable tape, welded joint | Welding, Hough connection | Flat mouth, socket connection |
Water tightness | The connection is sealed, the pipeline is leak-free, and the groundwater outside the pipeline cannot enter the water. | The connection is sealed, the pipeline is leak-free, and the groundwater outside the pipeline cannot enter the water. | Very poor sealing, water leakage at the joint, causing secondary pollution to the environment |
Construction features | It has good flexibility and low requirements for basic treatment. It is suitable for backfilling easily sag terrain such as lakes and swamps. It has good bendability and light weight. | It has good flexibility and low requirements for basic treatment. It is suitable for backfilling easily sag terrain such as lakes and swamps. It has good bendability and light weight. | Large rigidity, high basic requirements, not easy to bend, difficult to connect with other pipes, heavy weight, construction tools and equipment, etc. |
Site management | High safety, less handling damage, simple water shut-off test | High safety, low handling glass loss, simple closed water test | Poor safety, easy damage, more complicated construction management, complex closed water test, large labor consumption |
Comparison per meter weight | 10% of concrete pipe | 14% of concrete pipes | 100% |
Use characteristics | High safety after burying, can be maintained by welding | High safety after burying, can be maintained by welding | The safety after operation is low, the maintenance of the pipe needs to be completely replaced, and the workload is large. |
Buried traceability | Buried traceability | Non-buried traceability | Buried traceability |
Service life | About 50 years | About 50 years | About 15-20 years |
The surface roughness coefficient of the concrete pipe is 0.014, and the surface roughness coefficient of the steel belt reinforced polyethylene (PE) spiral corrugated pipe is 0.009. Therefore, compared with the concrete pipe of the same inner diameter, the steel belt reinforced polyethylene (PE) spiral corrugated pipe can increase the water delivery volume by more than 20% under the same conditions, and exceed the spiral winding hollow wall pipe and the concrete pipe with the same design flow rate.
Connection method
1. Hot melt extrusion welding connection
2, fused belt connection
3, heat shrinkable tube (with) connection
4, socket type rubber seal link
The patented product independently invented by our company; the steel belt reinforced polyethylene (PE) spiral corrugated pipe with the socket type is secondary processed on the basis of the original corrugated pipe and molded once. The pipe not only achieves continuity in production, but also breaks through the original link mode in the process of linking the pipeline. At the same time as the sealing performance meets the requirements, the water-tight test can be carried out according to the link method, and the compressive strength can reach 0.1Mpa. During the long-term hydrostatic test (1000 hours), it was demonstrated that the pressure at which the pipe can be used is 0.05-0.1 MPa. It is more convenient, safe and effective during the installation process.
Compared with concrete pipe specifications
| Serial number | Steel belt reinforced polyethylene spiral bellows (mm) | Replacement concrete pipe (mm) |
| 1 | 600 | 800 |
| 2 | 800 | 1000 |
| 3 | 1000 | 1200 |
| 4 | 1200 | 1400-1500 |
| 5 | 1500 | 1600-1800 |
| 6 | 2000 | 2500 |