HDPE trenchless special pipelines are produced with high-strength PE100 grade raw materials and are specially designed for trenchless construction processes such as horizontal directional drilling, pipe jacking, and interspersed repair. They have excellent tensile resistance, shear resistance, and high stiffness characteristics, allowing them to be laid and repaired without damaging pavement, greening, and buildings.

The pipe has good flexibility, high bending and tensile strength, can easily adapt to complex underground and turning laying, and withstand long-distance traction without cracking or deformation. At the same time, it has the advantages of corrosion resistance, wear resistance, smooth and small friction on the inner wall, and reliable interface sealing. It adopts hot-melt butt connection, and the joint strength is higher than that of the pipe body, which can achieve zero leakage and long life, and the service life is up to 50 years.

HDPE trenchless special pipelines are widely used in urban gas, water supply and drainage, electric power communication, municipal pipe network transformation, highway, railway and river crossing projects, etc. They are highly efficient in construction, occupy less land, and have little impact on the environment. They are the preferred pipes for modern urban pipe network construction, old pipeline renewal, and complex working conditions.

• High ring stiffness and high rigidity, suitable for directional drilling and pipe jacking extrusion conditions

  Special modified HDPE raw material, complete ring stiffness levels, resistant to back-drag force, soil extrusion, radial deformation, no collapse or deformation during pipe jacking construction;

  Comply with GB/T 19472, ISO 9969, ASTM D3350

• Super tensile and creep resistance, long-distance dragging without breakage

  It has excellent resistance to slow crack growth, can withstand directional drilling back drag force and drag friction, and is safe and stable in long-distance trenchless construction;

  Complies with ISO 13476, DVS 2207, ISO 9080

• High toughness and impact resistance, resisting sand drag and rock friction

  Elongation at break ≥800%, resistant to gravel scratching, rock impact, underground hard object wear, and not brittle in low temperature environments;

  Complies with EN 1046, ISO 13479

• The inner wall is smooth and low friction, and the medium transportation is efficient and energy-saving.
  

  The inner wall roughness is ≤0.007mm, the water flow resistance is small, the water delivery and drainage are smooth, and it is not easy to be blocked by siltation;

  Complies with ISO 10838, AWWA M55

• Hot melt integral connection, zero shedding and leakage of the interface during the back-towing process
  

  Integrated hot-melt butt joint forming, the joint strength is higher than the pipe body, the tensile strength is high, and there is no breakage or leakage when dragged back for a long distance;

  Complies with DVS 2207, EN 12814

• Acid, alkali and corrosion resistant, long-term stable underground operation
  

  Resistant to corrosion by soil acid and alkali, groundwater, microorganisms, and saline-alkali layers, does not rust or scale, and is suitable for complex geological soil layers;

  Complies with ISO 4433, ASTM D1693, EN 12573

• Excellent flexibility, adaptable to underground curved track laying
  

  It is flexible and can be bent along with the drilling trajectory, suitable for bends, curves, and oblique directional drilling construction, and reduces elbow pipe fittings;

  Compliant with ISO 4427

• Anti-aging and weather-resistant, adaptable to all geological environments
  

  Stable in a wide temperature range of minus 40°C to 60°C, resistant to underground moisture, freeze-thaw, and salt spray erosion, and applicable to all types of geology;

  Comply with ASTM F714, GB/T 18252

• The construction is efficient and environmentally friendly, reducing road excavation and demolition.
  

  It is suitable for trenchless processes such as directional drilling, horizontal directional drilling, pipe jacking, and lining repair, which will not damage the road greening and reduce construction costs;

  Comply with GB 50268, ISO 10460

• Super long service life and low comprehensive operation and maintenance costs

  The designed service life of underground non-excavation conditions is ≥50 years, without anti-corrosion maintenance, and is widely used in municipal water supply, gas, drainage, and power communication casing;

  Comply with GB 50235, AWWA C906