Spiral Galvanised duct

spiral pipe is formed from a coil of metal into a rigid steel tube with a 4-ply spiral lockseam. It has a smooth interior for low friction loss with the grooved seam entirely on the outside.

This pipe has a resistance to crushing approximately 2 1/2 times that of longitudinal lockseam or welded pipe.

Optional corrugations are available which increase the rigidity of the pipe by approximately 300%