Hydraulically efficient ribbed pipe and method of making thereof

Details Hydraulically efficient ribbed pipe and method of making thereof Hydraulically efficient ribbed pipe and method of making thereof

1998-06-22

1999-12-28

Butler, Rodney

Metal deforming

By tool-couple pressing together adjacent surface portions...

To form helically-seamed tube

B21C 3712

Patent

active

060065656

ABSTRACT:
A pipe formed from a continuous, cold rolled, lock seam quality, sheet steel, having a spiral rib. The pipe may be protected by an abrasion or corrosion resistant coating. The pipe is normally used for storm drains, culverts, sewer lines or HVAC. A closed spiral rib formed in the pipe wall adds strength to the wall, while maintaining a smooth inner wall that promotes exceptionally good fluid flow. The pipe has a smooth interior surface with outwardly projecting structural ribs of helical configuration throughout the length of the pipe.

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