HDPE double-wall, hollow, spiral three corrugated pipe introductionHDPE double-wall, hollow, spiral three corrugated pipe introduction
There are many types of HDPE corrugated pipe, such as HDPE double-wall corrugated pipe, hollow wall pipes, HDPE spiral corrugated pipe, etc. These types of corrugated pipe are different due to different pipe specifications and different pipe wall structures. I have summarized these three corrugated pipe The difference is to help you distinguish three different types of HDPE corrugated pipe.
Differences of HDPE double-walled, hollow and spiral corrugated pipe
1. HDPE double-wall corrugated pipe Double-wall corrugated pipe is formed by squeezing and extruding the corrugated outer wall and a layer of smooth inner wall simultaneously extruded by HDPE. The cross section of the pipe wall is a double-layer structure, the inner wall is smooth and flat, and the outer wall is equal moment Arranged pipes with trapezoidal hollow structure. It has excellent ring stiffness, good strength and toughness, light weight, strong impact resistance, and is not easy to break, and is easy to transport and install. The pipeline is mainly connected with a rubber ring socket (heat shrinkable tape can also be used for connection). Due to the special design of the corrugated wall structure of the double-wall corrugated pipe, the material (HDPE) is saved under the condition of the same diameter and the same ring stiffness. However, due to the limitation of production technology, the current domestic caliber can only be DN1200, which limits its promotion.
2. HDPE hollow wall winding pipe It is a kind of pipe material produced by using HDPE as a raw material rectangular pipe blank, which is formed by winding and welding. Due to its unique forming process, it can produce large-diameter pipes with a caliber of up to 3000mm, which is difficult or even impossible for other production processes to complete. This kind of pipe is basically the same as the double-wall corrugated pipe in performance. The pipe connection mainly uses the hot-melt belt connection method, and the connection cost is slightly higher than that of the double-wall corrugated pipe; Under stiffness, it generally consumes more raw materials than the double-wall corrugated pipe directly extruded, so its production cost is higher.
3. Metal inner reinforced polyethylene (HDPE) spiral corrugated pipe is a structural wall pipe made of polyethylene as the main raw material and processed by a special extrusion winding molding process. The product is made of PE layer in the inner layer and warp layer in the middle layer. The plastic-coated metal steel strip layer and the outer layer are three layers of special structure. The plastic-coated steel belt is combined with the inner and outer polyethylene layers in a molten state to make it organically melt into one body, which improves the strength of the pipe and solves the problem of corrosion of the steel belt exposed. The pipe diameter is from DN700 to DN2000. The main connection methods are: welding connection, clamp connection and heat shrinkable sleeve connection (for DN1200 and below). The advantage of this tube is that it can reach the ring stiffness that can not be achieved by other plastic pipes (up to 16kN / m2), and the cost is relatively low.