It’s worth a mention firstly that there are two common terms used in industry, tube bending and pipe bending. Tube is measured by the outside diameter whereas pipe is measured by the inside diameter. Pipe sizing refers to the nominal inside diameter, sometimes called nominal bore, rather than the actual inside diameter.
Tube is bent around a fixed radius die with a mandrel insert in to prevent it from collapsing during bending. The tube or pipe is clamped against the die and this is then rotated whilst the pressure die moves in a straight linear motion. This is the most common form of bending.
Tube bending is a metal forming process that is used to shape pipes or tubing.
Bending machines take straight tube stock and create a shape involving single or multiple bends. This allows the tubing to be formed in any fashion to fit the application’s specific needs. Round tubes are typically used for tube bending, but square or rectangular tubes can also be bent in order to meet your specific needs.
BIT hydraulic profile bending machine （hydraulic pipe bending machine） can specialize in rolling round tube and pipe in many different material types., such as aluminum tube rolling, stainless steel tube rolling, brass tube rolling, copper tube rolling, and plain steel tube rolling and bending.
BIT section bending machine roll all sizes of pipe from 3/8” to 24”. We work with almost all grades of carbon steel pipe and aluminum pipe, and can bend full and half pipe with equal quality and precision.
W24S-500 profile bending machine is the large three-roll section bending machine.
Equipped with BIT’s unique section bending combination mold, which can bend different profiles with the greatest precision and minimal deformation. BIT section bending combination molds are easy to use and a quick-change configuration that guarantees quick replacement, which is very valuable for time-saving customers, because they often bend profiles of different sizes and types.
W24S-320 profile bending machine is a large section bending machine with a volume of 3000×3000×2800mm and a weight of 30T.
The profile bending machine in the picture is ordered by a factory to bend I-Beame and rectangular tubes.
W24S-16 profile bending machine is a small section bending machine, capable of bending angle,channel, pipes, etc., but not capable of bending H-beam profile.
Pipes and tubes are usually measured by the outside diameter dimension – or OD. One might think that a 2.0 inch OD tube would measure 2.0 inches and a 6.5 inch OD tube would measure 6.5 inches. However, machines today cannot hold dimensions precisely to the nominal value, and because of that there must be acceptable degrees of variations. In other words, every dimension on a blueprint is subject to variations from the nominal value and so is “roundness”. But “out of roundess” measurement can be contained.