Lockseam Tube Manufacturing Process

The manufacture of lockseam tube is a clean, efficient and economic cost process for the generation of tubes from coil strip stock for a variety of industrial uses.

The process takes metal strip, flattens and then wraps in a continuous helix around a former where the 4 ply lockseam join is made.

The diameter of the tube is determined by the spiral forming head. In a spiral tube the seam is a helix wrap around the tube and because of this for any given material gauge it is significantly stronger than its linear counterpart.

Oval tube is formed as a secondary process to round tube in an “ovaliser” machine. The flat oval shape has increased duct strength over rectangular duct and with less flat surface it provides lower air and friction loss as well as reduced vibration.