Hot Rolled Sheet 

Continuous Pickle Line

Hot Strip Mill  |  Continuous Pickle Line  |  Temper Mill

Product processed through the pickle line is designated as Hot Rolled Sheet Pickled or Hot Rolled Sheet Pickled Non-Temper Rolled.

Product designated as Hot Rolled Sheet Pickled is processed through the pickle line and temper rolled. Alternately, product designated as Hot Rolled Sheet Pickled Non-Temper Rolled is processed only through the pickle line with no additional processing. Therefore, any pickled applications requiring guaranteed flatness must be ordered Hot Rolled Sheet Pickled.

In either case, the pickling operation results in coils that have a clean bright grayish surface. The coil ends are cropped back to gauge. These products may be ordered as dry, oiled, mill edge or side trimmed edge. When ordered as side trimmed edge, the product will exhibit a uniform edge with excellent width control. These edges result in better conditions for welding as compared to a mill edge. When product is ordered as oiled, a film of oil will be applied for rust and surface protection. Special precautions to prevent rust must be taken on any product ordered dry.


       

1.	Uncoiler Receives coils from the hot strip mill and unwraps them for processing through the pickle line.
2.	Processor Primary purpose is to minimize tendency for coil breaks by alternately flexing the steel around a series of small diameter rolls. In addition, the surface oxide is cracked for improved pickling
3.	Shear and Welder Provide square coil ends which are welded together, so strip can be processed continuously through the pickle line.
4.	Temper Mill Primary purpose is to increase pickling efficiency by breaking the surface oxide which forms on the strip surface at the exit end of the Hot Strip Mill. In addition, the temper mill provides some degree of improved strip flatness.
5.	Pickle Tanks Remove the surface oxide from the strip by a chemical reaction with Hydrochloric Acid (HCL). This results in a bright, oxide-free surface that is required for many customer hot rolled product applications or for further processing into cold rolled or coated sheet products.

        

6.	Rinse Tanks Cascading water rinses clean any residual acid from the strip surface.
7.	Dryer Removes any excess water to prevent surface rust or stain.
8.	Shear Cuts coils to the desired weight for shipment or processing.
9.	Oiler Provides a film of oil for rust protection as well as protection against wrap to wrap gouging during handling and further processing.
10.	Side Trimmer Cuts each edge of the strip to provide uniform edges with excellent width control.
11.	Recoiler

This is representative of a typical surface appearance along with a side trimmed edge of Hot Rolled Sheet Pickled product.