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With stable product quality and advanced manufacturing processes, we provide safe, durable and efficient pipeline solutions for various infrastructure construction projects.
Polyethylene (PE) spiral wound structured wall type B pipe, commonly known as Krah pipe, is a new type of structural wall pipe made from high-density polyethylene using a hot-processing technique. The weld seam of the flat strip is covered by a supporting pipe, improving the quality of the weld seam and the overall compressive strength of the product. The connection uses electrofusion welding, with pre-treated electrofusion welding wire, making the pipe connection convenient and reliable, especially for large-diameter pipe systems. It has advantages such as good connection sealing, strong anti-settlement ability, and long service life, and has been recognized by my country’s Ministry of Municipal Construction as a key green and environmentally friendly pipe product for promotion. Haojia Krah pipe is corrosion-resistant, anti-aging, flexible, and highly adaptable to engineering projects, making it a high-quality pipe material for drainage and sewage projects.
Product Advantages:
◆ High Impact Resistance and Low-Temperature Brittleness Resistance: It exhibits excellent low-temperature resistance, with a brittleness temperature of -60℃, demonstrating good impact resistance. Generally, no special protective measures are required during construction under low-temperature conditions (above -20℃), facilitating winter construction.
◆ Strong Corrosion Resistance and Durability: High-density polyethylene has extremely strong resistance to chemical corrosion and erosion, requiring no anti-corrosion treatment and boasting a service life of over 50 years.
◆ Good Installation and Sealing Connection: Utilizing the same material socket electrofusion connection technology, the connection quality is high, with excellent sealing to prevent leakage, ensuring the consistency of the pipeline system’s lifespan and operational safety.
◆ Tough and Wear-Resistant, Easy Construction: The pipe material is highly flexible, possessing rigidity, overall resistance to external pressure, and excellent wear resistance. During construction, no concrete bedding or concrete pipe foundation trench is required; the pipe can be laid directly after passing inspection, simplifying the construction process and shortening the construction period.
Pipe Specifications And Models:
| Nominal Size (DN/D) | Minimum Average Outer Diameter (mm) | Minimum Average Outer Diameter (mm) | Ring Stiffness Rating (mm) |
| 150 | 145 | 1.0 | SN8、SN10、SN12.5 |
| 200 | 195 | 1.1 | SN8、SN10、SN12.5 |
| (250)a | 245 | 1.5 | SN8、SN10、SN12.5 |
| 300 | 294 | 1.7 | SN8、SN10、SN12.5 |
| 400 | 392 | 2.3 | SN8、SN10、SN12.5 |
| (450)a | 441 | 2.8 | SN8、SN10、SN12.5 |
| 500 | 490 | 3.0 | SN8、SN10、SN12.5 |
| 600 | 588 | 3.5 | SN8、SN10、SN12.5 |
| 700 | 673 | 4.1 | SN8、SN10、SN12.5 |
| 800 | 785 | 4.5 | SN8、SN10、SN12.5 |
| 900 | 885 | 5.0 | SN8、SN10、SN12.5 |
| 1000 | 985 | 5.0 | SN8、SN10、SN12.5 |
| 1100 | 1085 | 5.0 | SN8、SN10、SN12.5 |
| 1200 | 1185 | 5.0 | SN8、SN10、SN12.5 |
| 1300 | 1285 | 6.0 | SN8、SN10、SN12.5 |
| 1400 | 1385 | 6.0 | SN8、SN10、SN12.5 |
| 1500 | 1485 | 6.0 | SN8、SN10、SN12.5 |
| 1600 | 1585 | 6.0 | SN8、SN10、SN12.5 |
| 1700 | 1685 | 6.0 | SN8、SN10、SN12.5 |
| 1800 | 1785 | 6.0 | SN8、SN10、SN12.5 |
| 1900 | 1885 | 6.0 | SN8、SN10、SN12.5 |
| 2000 | 1985 | 6.0 | SN8、SN10、SN12.5 |
| 2100 | 2085 | 6.0 | SN8、SN10、SN12.5 |
| 2200 | 2185 | 7.0 | SN8、SN10、SN12.5 |
| 2300 | 2285 | 8.0 | SN8、SN10、SN12.5 |
| 2400 | 2385 | 9.0 | SN8、SN10、SN12.5 |
| 2500 | 2485 | 10.0 | SN8、SN10、SN12.5 |
| 2600 | 2585 | 10.0 | SN8、SN10、SN12.5 |
| 2700 | 2685 | 12.0 | SN8、SN10、SN12.5 |
| 2800 | 2785 | 12.0 | SN8、SN10、SN12.5 |
| 2900 | 2885 | 14.0 | SN8、SN10、SN12.5 |
| 3000 | 2985 | 14.0 | SN8、SN10、SN12.5 |
Application Areas:
1. Underground drainage and sewage systems for municipal buildings;
2. Industrial drainage and sewage pipeline systems;
3. Irrigation and drainage pipeline systems for farmland, orchards, vegetable gardens, and forest belts;
4. Rainwater harvesting and comprehensive utilization pipeline systems;
5. Pipeline systems for public facilities such as urban utility tunnels, roads, bridges, mines, airports, and railway stations;
If you are interested in collaboration, require project consultation, or wish to discuss business opportunities, please feel free to contact us. We look forward to establishing a long-term cooperative relationship with you.
