The appearance is white, the inner and outer walls are flat and smooth, and there are no obvious bubbles, cracks and uneven color defect. The inner and outer surfaces should be free of ribs and similar defects and the edges of the nozzle are smooth and do not damage the insulation of wires and cables.

(1) Strong connection: the polyethylene piping system is connected by electric heat fusion, and the strength of the joint is higher than the strength of the pipe body.

(2) Good low-temperature impact resistance: The low-temperature embrittlement temperature of polyethylene is extremely low, and it can be safely used in the temperature range of -60-60℃.

(3) Good resistance to stress cracking: HDPE has low notch sensitivity, high shear strength and excellent scratch resistance, and environmental stress cracking resistance is also very prominent.

Widely used in urban power grid construction and reconstruction, urban municipal reconstruction projects, civil aviation airport engineering construction, industrial parks, community engineering construction, transportation, road and bridge engineering construction, post and telecommunications; products are located in concrete, floor slabs or walls as wire conduits ( Dark pipe), can also be used as a general wiring conduit (open pipe), etc.