Seller rollforming

this spiral corrugated post-tensioning tube making machine is special for producing round corrugated ducts used in expressway, bridge, train and large-span post-tension concrete project. the prestressed protection tube machine is suitable for both indoor and site work. with its special corrugations, a very high radial stiffness well adapted for use as former in concrete structures. corrugated tube is also being used as culverts and forms for concrete projects, plinths and columns. on many construction projects like apartment buildings, parking garages, office buildings, industrial buildings, bridges and docks, schools and hospitals, the introduction of the prestressed protection tubes will make it possible to use very long spans. the reduction in weight allows large areas and fewer columns which in turn will give technical economical and esthetic advantage. this machine is the fastest and most productive of its kind and is mainly used for building bridges, high rise buildings and power plant buildings.