As it is typically understood in the rolling and bending marketplace, mandrel tube bending, also called rotary-draw bending, is a method of bending pipe and tubing to a given center-line radius through 180 degrees or less. An internal mandrel placed inside the tubing or pipe prevents the pipe from collapsing or becoming oval as the pipe is wrapped around a die. For each diameter of pipe and each radius that the pipe is bent to, a unique set of tooling is required. Although there are other methods of doing mandrel tube bending, we mandrel bend pipe in this manner.
Chicago Metal Rolled Products can mandrel bend pipe up to 6” OD pipe with the rotary-draw method with a center-line radius as tight as two times the diameter of the pipe, i.e. it can bend 6” pipe to a 12” center-line radius with minimal distortion. Mandrel tube bending requires the correct tooling and appropriate machinery to ensure high quality. Chicago Metal owns more than 500 sets of tooling. With this large inventory of tooling, its customers do not have to incur tooling charges to obtain their required parts. Chicago Metal also specializes in the more difficult mandrel bending of square and rectangular tubing. Not only does the company have a vast array of such tooling, it can also quickly develop its own tooling in its in-house machine shop.
Mandrel-bent pipe as well as round, square and rectangular tubing can be saw cut, pierced, welded, and coped. And the mandrel bent pipe can be threaded too.
We mandrel bend pipe to become component parts in boilers, generators, exercise equipment, farm and construction equipment, roll-over protection (ROPs), playground equipment, and countless other applications.
Contact us for more information on how we mandrel bend pipes and mandrel bend sections.