Here is a summary of how the best hot rolled steel coil should be uncoiled and straightened to prepare it for further processing:

1. Uncoiling:
- The coil should be placed on an uncoiling stand or mandrel that can rotate smoothly to allow the coil to unwind.
- The coil should be anchored securely to prevent it from unwinding too quickly and becoming tangled.
- The uncoiling should be done at a controlled, best hot rolled steel coil  even pace to avoid creating kinks or bends in the material.

2. Straightening:
- After uncoiling, the steel strip will likely have some residual curvature from being coiled.
- The steel should be passed through a series of straightening rolls or a straightening machine to remove this curvature.
- The straightening process applies controlled bending in opposite directions to flatten out the steel and produce a straight, uniform strip.
- The number of straightening stands and the amount of bending applied is adjusted based on the thickness and properties of the steel to achieve the desired flatness.

3. Tension Control:
- Maintaining the right tension on the steel strip is important during both uncoiling and straightening.
- Excessive tension can cause the steel to become work hardened or even break, while insufficient tension allows the strip to become wavy.
- Tension is typically controlled using bridle rolls, dancer rolls, or other tension control mechanisms.

4. Inspection and Adjustment:
- The flatness and surface condition of the steel should be inspected after straightening.
- If necessary, the straightening process can be repeated or adjusted to improve the flatness and prepare the steel for the next manufacturing steps.

The specific uncoiling and straightening procedures may vary depending on the steel grade, thickness, and the requirements of the downstream processes. Proper setup and control of these initial steps is crucial to ensure the steel coil is in the optimal condition for further processing.