HDPE double-wall corrugated pipe

HDPE double-wall corrugated pipe is made of high-density polyethylene by extrusion molding, showing a double-layer structure with smooth inner wall and corrugated outer wall. Its core performance is measured by ring stiffness, commonly SN4, SN8 grade, can withstand external pressure of 4000N/m², 8000N/m², suitable for buried depth of 2-5 meters of drainage, sewage scenarios.
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