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The conventional design is most commonly used when running multiple tube and pipe sizes made of mild steel with a T/D ratio (thickness divided by diameter) between 3-8%. If the gauge thickness is below 3% or above 8%, other styles of design are recommended, such as Edgeform, Versatile Edgeform, or W-Style. The single-radius design is very forgiving during setup since it is not as critical that it be centered like the other breakdown styles.
A taller side roll profile may be needed when using this design, in order for the tube to be properly shaped to enter the fin passes. This is important in order to avoid overworking the strip and inducing instability.
The conventional style is a single-radius design and is only used when specified by the customer or if existing sets on the mill run conventional design since most demand more range of gauges and material types on one set. It has several limitations:
Even with its limitations, the conventional style is commonly used in many applications and provides a good quality product where it can be used.
First Time Performance
Roll form tooling tested at our facility or yours
Detailed setup package & technician's testing remarks
Tooling drawing fully detailed
Technicians available to troubleshoot at your facility
Tooling shipped in foam-filled wooden crates
Minteq International, Inc.
Corporate Purchasing Manager
Bull Moose Tube Company
Welded Tubes, Inc.
After a long dry spell of over two years due to the pandemic, Roll-Kraft hosted its first regional seminar of the 2022 season in Waverly, Nebraska on May 3rd.
Join us on May 3rd, 2022 for our live Tube & Pipe training seminar.