Continuous hot strip rolling system and method thereof

A rolling method in a continuous hot strip rolling system in which bars are joined between a roughing train and a finishing train for continuous rolling, said method comprising the steps:

• disposing a plurality of two-high mill stands alone as mill stands of said roughing train close to each other so as to provide tandem rolling;
• disposing descaling means having a water ejecting nozzle movable in a direction transverse to the direction of travel of a material to be rolled at an entrance of said roughing train;
• and
• conducting descaling of the material to be rolled conveyed to said roughing train by moving the water ejecting nozzle of said descaling means at an angle relative to the direction of travel of the material to be rolled and then by returning said nozzle at another angle.

A continuous hot strip rolling system, comprising:

• a roughing train with a plurality of two-mill stands disposed close to each other so as to provide tandem rolling;
• a finishing train for continuous rolling;
• and
• descaling means disposed at an entrance of said roughing train, said descaling means having a nozzle which is movable in a direction transverse to the direction of travel of material to be rolled at a variable angle.

A continuous hot strip rolling system, comprising:

• a roughing train with a plurality of two-mill stands disposed close to each other wherein said two-high mill stands include two twin-roll stands having two pairs of work rolls which are incorporated in a common housing assembly having a window portion at each of the two sides thereof so as to provide tandem rolling, a bearing box for each of the work rolls being incorporated in a window portion provided at each side of said housing;
• a finishing train;
• means for joining bars, arranged between said roughing two-high mill stands and said finishing train whereby bars rolled by said roughing two-mill stands are joined for continuous rolling by said finishing train;
• and
• roll edgers, each of which is disposed at an exit of each of said two twin-roll arranged stands, at least the upstream roller edger being of the non-driven type.