HDPE double-wall corrugated pipe is a new type of pipe with high strength and good toughness, which adopts advanced composite technology and makes full use of the good toughness of high-density polyethylene material. The following is an introduction to the content of the national standards for HDPE double-wall corrugated pipes.
1. The raw materials used in the production of HDPE double-wall corrugated pipes are mainly high-density polyethylene resin. In order to improve the performance of the pipe, other materials can be added appropriately, but the content of polyethylene resin should be controlled within a reasonable range.
2. The color of the inner and outer layers of the pipe should be uniform, the outer layer is usually black, and other colors can be negotiated by both parties; the outer wall of the pipe should not have obvious defects such as air bubbles and magazines; both ends of the pipe should be flat and perpendicular to the axis.
3. The physical properties of the pipe must meet the relevant regulations, such as the flexibility of the ring, the pipe must be kept free of rupture, the two walls are not disengaged, and the inner wall is not disengaged in the opposite direction; the density of the pipe must be ≤1180kg/m3; the creep ratio must be ≤4, etc.
4. The average outer diameter, average inner diameter, wall thickness, etc. of the HDPE double-wall corrugated pipe, and the average inner diameter of the socket must meet the requirements of GB/T8806-2008. Take the arithmetic mean of the two inner diameters as the average inner diameter of the pipe, etc.
5. For pipe samples, the ring flexibility, density, oven test, etc. must meet various specifications. For example, when testing the ring flexibility, the outer diameter deformation in the vertical direction should reach 30% of the original outer diameter. Immediately unload, and then observe Whether the pipe sample is broken, whether the inner and outer walls are disengaged, etc.
HDPE double-wall corrugated pipe is mainly used as a drainage and sewage pipe, and its use is related to many aspects of daily life of many people. Therefore, there are many contents in its national standards, which will not be introduced in more detail here. Hope the above content can provide you with some help.