Comparison between steel belt corrugated pipe and PE solid wall pipe, cost analysis of sewage project

In municipal and factory sewage projects, pipeline selection directly determines the overall investment and long-term operation and maintenance efficiency of the project. Steel bellows and PE solid-wall pipes are two commonly used pipes, and the cost difference between the two is worthy of in-depth analysis.

In terms of material cost, the steel belt corrugated pipe adopts a steel-plastic composite structure. Under the same drainage diameter, due to the enhanced characteristics of the steel belt, the pipe wall thickness is thinner and the material consumption is less. Although the single-meter unit price is slightly higher than that of the same diameter PE solid-wall pipe, the larger effective diameter can improve the drainage efficiency, and the corresponding material cost per unit flow is lower. PE solid-wall pipe is made of pure polyethylene, and the single-meter unit price of small-diameter pipe is lower. However, as the diameter increases, the wall thickness needs to be increased simultaneously to ensure strength. The material consumption increases geometrically, and the single-meter cost of large-diameter pipe will quickly exceed that of steel belt corrugated pipe.

In terms of construction cost, steel bellows are lightweight, with a single section length of up to 6 meters. They are connected by hot melt or socket type, easy to operate, shallow trench excavation depth, no need for large-scale lifting equipment, less labor investment, short construction period, and small and medium-sized projects can reduce construction costs by 20% -30%. PE solid-wall pipes have large-diameter products and require auxiliary installation by lifting equipment. The trench excavation requirements are higher, the connection process takes longer, and the overall construction investment is higher.

In terms of long-term operation and maintenance costs, the steel belt corrugated pipe ring stiffness can reach more than 8kN/m ², with strong resistance to ground subsidence and external pressure, and is not prone to deformation or damage. Daily operation and maintenance only require routine cleaning, and maintenance costs are low. PE solid-wall pipe ring stiffness is generally low, and it is prone to deformation and cracking in complex geological or heavy-duty sections. Regular inspection and repair are required. Long-term operation and maintenance investment is significantly higher than that of steel belt corrugated pipes.

In summary, the selection of sewage projects needs to be considered in combination with the project scale and geological conditions: small and medium-diameter short-distance sewage discharge, the initial cost of PE solid-wall pipes is more advantageous; in large-diameter, long-distance or complex geological environments, the comprehensive cost of steel bellows is more cost-effective.