Tube Bulging

Tube bulging is a metal forming process used to expand the diameter of a tube by applying internal pressure or axial force, causing the material to deform outward against a die or into a desired shape. It is often used to create complex geometries, such as tees, bellows, or bulged sections, without the need for welding or joining separate parts. 

This method improves structural integrity and reduces weak points, while allowing for smooth, continuous surfaces that can withstand internal pressure and external stresses.

Beads or bulges are often added to a tube to provide a stop for contact with another part.

The internal and external features of a bead are rounded. The amount of deformation that can be achieved is dependent upon the size of the tube, alloy and the wall thickness. Typically, with stainless steel, the maximum increase in outer diameter is 40% of the tube’s original diameter.

New England Small Tube can lower your cost and save time on your application Call us today at (603)429-1600 to learn how.