Introduction to the differences of three kinds of HDPE corrugated pipes

1. The HDPE double-wall corrugated pipe

It is formed by one-time fusion and extrusion of the corrugated outer wall and a smooth inner wall extruded from HDPE at the same time. Tube with hollow structure. It has the characteristics of good ring stiffness, good strength and toughness, lightweight, strong impact resistance, not easy to break, and convenient transportation and installation.

The pipes are mainly connected by rubber ring sockets (can also be connected by heat shrinkable tapes). Due to the special corrugated pipe wall structure design of the double-wall corrugated pipe, the material can be saved under the condition of the same diameter and the same ring stiffness. However, due to the limitation of the production process, the caliber that can be produced in China is only DN1200, which makes its promotion subject to certain restrictions.

2. HDPE hollow wall winding pipe 

It is a kind of pipe that is made of HDPE as raw material to produce rectangular tube blank and formed by winding and welding. Due to its special molding process, it can produce large-diameter pipes with a diameter of up to 3000mm, which is difficult or even impossible for other production processes to complete.

The performance of this kind of pipe is the same as that of the double-wall corrugated pipe. The pipe connection mainly adopts the hot-melt belt connection method, and the connection cost is slightly higher than that of the double-wall corrugated pipe. In addition, a major disadvantage of this pipe is

Under the same diameter and the same ring stiffness, it generally consumes more raw materials than the directly extruded double-wall corrugated pipe, so its production cost is higher.

3. The metal reinforced polyethylene (HDPE) spiral corrugated pipe 

It is a structural wall pipe made of polyethylene as the main raw material and processed by a special extrusion winding process. The inner layer of the product is the PE layer and the middle layer is coated It is composed of a three-layer special structure with a plastic-treated metal steel belt layer and a PE layer as the outer layer.

The plastic-coated steel strip and the inner and outer polyethylene layers are compounded in a molten state so that they are organically integrated, which not only improves the strength of the pipe but also solves the problem that the exposed steel strip is easy to corrode. Pipe diameter from DN700-DN2000. The main connection methods are welding connection, clamp connection, and heat shrinkable sleeve connection (applicable to DN1200 and below).

 The advantage of this pipe is that it can achieve the ring stiffness (up to 16kN/m2) that other plastic pipes cannot achieve, and the cost is relatively low.

Elastic characteristics of double-wall corrugated pipe with steel belt spiral corrugated pipe

The double-wall corrugated pipe of the PE water supply pipe manufacturer is a high-impact pipe developed to cope with the large-flow drainage caused by the climate or some other reasons. We admire its function and elasticity, so the high resistance of the PE water supply pipe manufacturer What are the elastic characteristics of the PVC-M reinforced double-wall corrugated pipe?

When the double-wall corrugated pipe of the PE water supply pipe manufacturer is used as a measuring element, the difference between the measured value of its load or displacement and the calculated value obtained by their linear relationship, the ratio of the above difference to the relatively large load or relatively large displacement is called Linearity as a characteristic of double-wall bellows. This linear relationship can be a straight line passing through the coordinate zero point and the range endpoint, or a straight line that makes the linearity relatively small.

The stiffness of the high-impact PVC-M reinforced double-wall corrugated pipe of the PE water supply pipe manufacturer refers to the ratio of the load change to the displacement change caused by it. In the linear characteristic region of the double-wall corrugated pipe, the stiffness of the double-wall corrugated pipe remains unchanged. In the nonlinear characteristic region of the double-walled bellows, the stiffness of the bellows varies. In this case, it is meaningful to specify the stiffness when the displacement of the double-walled bellows is. When the load applied to the double-wall bellows is a concentrated force, it is called the concentrated force stiffness. When the load applied to the double-wall bellows is pressure, it is called pressure stiffness. When the load applied to the double-wall bellows is a moment, it is called moment stiffness or bending stiffness. The inverse of the stiffness of the double-wall bellows is called the sensitivity of the bellows.