What are corrugated steel pipes?
Corrugated steel tubes, with their unique corrugated structure, offer greater rigidity. This makes them exceptionally capable of deformation when subjected to external loads or internal pressures.
Segmented corrugated steel pipes
Assembled with two or more corrugated panels and fixed together using high-strength screws, these tubes are characterized by their thin panels and lightweight design.
This makes them easy to transport, store and provides a simple construction process with shorter lead times.
Typically made from Q235B steel, Q345B steel is used for large spans with high fill.
Available in various cross-sectional shapes such as circular, elliptical and horseshoe, they are mainly employed in road culverts, railways, municipal projects and storage areas.
Current manufacturing processes involve bending individual corrugated panels, processing and fitting screw holes, and then assembling on site. However, this method has its drawbacks, including inefficiency, inconsistency, and assembly challenges.
Whole corrugated steel tubes
Whole corrugated steel tubes
Formed by welding a steel plate or strip into a tube shape and then cold bending it into a circular corrugated steel tube. The ends are welded to the flanges and these are fixed with high strength screws.
Asbestos or rubber gaskets guarantee an airtight seal between the flanges. Recognized for their high strength, thin sections, lightweight nature and shorter construction time, they typically employ Q235B steel and are generally circular in cross-section.
These tubes are aesthetically pleasing and have the advantage of being easy to seal. Corrugations add flexibility to the pipe, allowing it to bend and expand in different directions, adapting to different locations and installation environments.
However, transporting these tubes in one piece can be expensive.
Spiral corrugated steel pipes
Spiral corrugated steel pipes
Invented in the US in 1896, spiral corrugated steel pipes have been used for over 100 years in developed Western countries.
Typically manufactured with double-sided galvanized steel sheets with a 600g/m coating, these tubes are mechanically corrugated and formed with a rolled edge.
They are mainly used in underground drainage, urban sewer systems, highway culverts, multi-purpose utility tunnels, well pipes, irrigation canals, mine escape routes and more.
Their strengths include high rigidity, flexibility, lightweight construction, quick installation, longevity, stable environmental performance and cost-effectiveness, making them an excellent alternative to drainage pipes.
Unlike traditional full corrugated steel tubes, the corrugations in spiral tubes are helical, allowing them to withstand higher pressures and thermal stresses.
These tubes are known for their unique wavy shape, which offers excellent flexibility and elasticity, allowing them to bend and stretch in multiple directions.
Furthermore, the smooth inner wall prevents sediment accumulation and the tube features superior corrosion resistance and long service life.
Most spiral corrugated steel pipes are manufactured continuously, offering high production efficiency and meeting large volume production.
However, this method requires a substantial investment and occupies a significant area.
