HDPE silicon core pipe

Main specifications of HDPE silicon core pipe:
Size model (outer diameter/inner diameter, unit: mm):

Φ32/26, Φ40/33, Φ50/42, Φ63/54, etc. (Example: Φ32/26 indicates an outer diameter of 32mm and an inner diameter of 26mm).
Spool length: Up to 2000-3000 meters for a single spool, with reduced interfaces (customization supported).
Material characteristics:

Outer layer: High-density polyethylene (HDPE), density ≥ 0.94 g/cm³, resistant to compression and impact.
Inner layer: Solid silicon lubricating layer, friction coefficient < 0.15 (about 1/3 of that of ordinary pipes).
Performance standards:

Operating temperature: -40℃ ~ +60℃ (resistant to cold and heat).
Ring stiffness: ≥ 8kN/m² (anti-compression in underground conditions).
Pressure resistance: ≥ 0.8MPa (short-term pressure).
Color and marking:

Regular black color, customizable with colored stripes (for easy engineering distinction).