Manufacturing Process of spiral Pipes in ISCO

Coil preparation: Coil ends are cut in the coil preparation machine which makes sure that only coils with straight and smooth ends will enter the pipe mill.

After opening, the coil passes through the leveler to optimize the flatness of the coil. To achieve the uniform strip width as outlined in the above formula, the coil edges are beveled and milled simultaneously in the edge milling machine. Considering the importance of proper weld joints, the strip edges will follow the following joint design scheme:

·         Double - Square - Groove Weld ( Suitable for strips with thickness more than 4 and less than 12.7 mm )

·         Double - v – Groove Weld (Suitable for strips with thickness more than 12.7 mm)

The main drive moves the strip to the forming unit. After achieving the desired diameter the inside and outside welding processes are performed. The pipe manufacturing and forming operations are completely automatic and operator independent.

Pipes will be cut to the desired length by plasma arc cutting technology. Submerged Arc Welding (SAW) using two electrodes (Tandem Arc) is applied as the welding process. After Leakage test by hydrostatic testing machine, which can handle test pressures up to 3000 psi and diameters of up 64 inch, the pipe ends are beveled.

The beveling angle complies with normal standards. Beveling in non-standard angles as per costumers orders is possible .After Passing inspection, pipes are weighed and prepared for delivery.

Manufacturing of spiral pipe is based on the following formula: