These pipes are generally classified into two categories according to the general forms of the pipes: the longitudinal Pipes and the Spiral Pipes. While in accordance to the applications of the pipes, they are widely classified into several categories. And they are
1. Galvanized pipes with zinc coating on the surface
2. Blow oxygen pipes used for blowing oxygen especially for the manufacturing of the pipes of small diameters.
3. Electrical welding pipes generally used for conduit electrical wiring.
4. Welding thin walled tube used for making toys, furniture etc.