Corrugated tube is produced by indenting a plain tube with a spiral pattern. No tube wall thinning takes place & no strength is lost. A smooth indented inner profile ensures easy cleaning. Turbulence is created at low fluid velocities to enhance the heat transfer in the tube. Fouling on the tube surface is minimised. A wide range of diameters & styles are available.

There are three types of corrugated tubes - Soft, Hard and Dimpled.


For an optimum design in terms of area, pressure drop, fouling etc., for a particular type of application the corrugations type is based on the following factors:

• Corrugation depth
• Corrugation pitch
• Corrugation angle
• Number of starts

By choosing the depth, angle and width of the indentation carefully, the rate of decrease in boundary layer resistance can exceed the rate of increase in pressure loss to provide the optimum design in terms of area, pressure drop, fouling, etc., for the particular application.