Tube Bending Services

Tube Bending Material Options

• Welded Tube: Flat metal rolled into tubular form with welded edges.
• Seamless Tube: Made without welding by heating and drawing solid metal into tubular form.
• Extruded Tube: Made by heating metal and extruding through a preformed opening, enabling complex shapes — common for aluminum.
• Drawn Tube: Made by pulling tubing through a smaller die for higher precision and strength. Extruded and welded tubesall drawable
• DOM（drawn forming）：welded tubing is drawn over a mandrel for forming，improves strength and surface finish
• HREW（hot-rolled welded tube）：made from hot-rolled steel，lower-priced general-purpose tubing
• CREW（cold-rolled welded tube）：andHREWsimilar，made from cold-rolled steel，slightly better surface finish

Tube Bending Capabilities

KH-TAT provides comprehensive tube and pipe bending services covering the following core processes:

Mandrel Bending – Mandrel bending (also known as mandrel bending) is similar to rotary draw bending but fully maintains the tube's internal profile throughout the bend. This process uses an internal support structure called a mandrel to maintain tube structure during bending，ensures minimal unnecessary deformation.Mandrel Bendingmachine with long worktable and mandrel rod，mandrel positioned at the bend tangent point.tube slides over mandrel，mandrel remains stationary after machine clamps，completes the bend.this process is especially suitable for thin-wall、large-diameter and small-radius bent tubing，effectively prevents collapse during bending

rotary draw bending – rotary draw bending is the most commonly usedTube Bendingmethod。equipment uses clamp die、radius die（bend die）and pressure die，holds the tube in form throughout the bending process。tube clamped on bend die，driven by hydraulic or electric power“draw”bent around other dies，achieves high precision、repeatable bend results。this process can be manual、semi-manual or CNC operation，computer-controlled rotary draw bending achieves unparalleled precision，especially suitable for high-volume production。please note，setup time may be longer，and each unique bend requires custom tooling

roll bending – roll bending（also known as roll bending）uses three dies or rollers to secure the tube，piston presses downward，operator loads the tube“roll”through machine，forms a gradually curved arc。tube repositioned in the die，piston descends further，repeat the process until desired shape is achieved.this method is typically manual，motor drive can also be used for increased power input. roll bending achieves multiple bend angles and shapes without additional tooling，ideal for large, gradual bends，but precision and repeatability are relatively limited

compression bending – compression bending involves clamping the tube or pipe in place，applies force directly to bend。this process is mainly for single-bend applications，no internal support needed。bending typically results in oval cross-sections，and may flatten the bend area。bend angles generally limited to120degrees or less