Introduce Mandrels are a commonly used tool when bending pipes. Proper use of the mandrel can help prevent some of the most common problems and problems you might encounter when bending a tube. However, if the positioning is not correct, the mandrel can cause its own problems. Before you start bending, it is important to […]
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.
Foreword: Tube bending is one of the most common forming processes when it comes to manufacturing metal parts for different industries. In fact, tube bending is considered the main operation to form tubing and piping as the final product or as part of a system. However, there are some aspects to consider before performing this operation. Most tubes are […]
NPS, or nominal pipe size, is the North American set of size standards for pipes that are used for temperatures and pressures of all ranges. The nominal pipe size identifies the size of the diameter of the pipe’s hole with a non-dimensional number. Using the NPS, a pipe is identified by its diameter and then with another non-dimensional number for the pipe’s wall thickness.
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.
The fundamental difference between tube and pipe, which can often have the same outside diameter (O.D.), is that tube is manufactured to tighter tolerances than pipe. Tube Diameter And Pipe Diameter Sizes Tube sizes are the actual outside diameter. (O.D.) Pipe sizes are the nominal bore (N.B.). The true outside diameter of a Pipe is […]
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.
When the curved parts are to be used in construction, it is imperative that the steel fabricator and the bender/roller communicate exactly how the parts are to be oriented. Are the square tubes rolled against one of the sides or off-axis? Are the rectangular tubes rolled against the strong axis or the weak axis? Or are they to be rolled off-axis? Equally important is whether or not these curved tubes are architecturally exposed (AESS).
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.