Summary and Comparison: Characteristics of Steel Flange Suction Pipe vs. HDPE Suction Pipe (Reference for Comparison)

Strength/Stiffness: Extremely high, resistant to external pressure; Lower, need to pay attention to pressure resistance and deformation.

Durability: Long (dependent on anti-corrosion); Long (material itself is corrosion-resistant).

Weight: Very heavy, requires mechanical installation; Very light, can be installed by hand.

Cost: Higher initial investment; Lower initial investment.

Connection Method: Flange connection, detachable; Hot melt connection, permanent.

Maintainability: Excellent, can replace sections; Poor, needs cutting and welding.

Corrosion Resistance: Good (dependent on external coating); Excellent (material itself is corrosion-resistant).

Inner Wall Smoothness: Lower, slight resistance; Extremely high, good hydraulic performance.

Application Recommendations:

Prioritize steel flange suction pipe in the following situations:

◦ High requirements for pipeline strength and stability (e.g., deep underground, heavy load road above).

◦ Frequent maintenance or possible replacement of pipe sections.

◦ High working pressure or vacuum conditions.

◦ Project budget is sufficient, more emphasis on long-term structural reliability and maintainability.

Consider other materials (such as HDPE) in the following situations:

◦ Projects sensitive to cost.

◦ Lack of large lifting equipment on site, or narrow installation space.

◦ Extremely high requirements for hydraulic efficiency in long-distance transportation.

◦ Projects that particularly emphasize quick installation.

In summary, steel flange suction pipe is a traditional solution with core advantages of high reliability, high strength, and high maintainability. Its disadvantages mainly lie in weight, cost, and dependence on anti-corrosion. When choosing, the specific project needs, budget, and operation and maintenance plan should be comprehensively considered.