Quality problems of LSAW steel pipe

In the production of LSAW steel pipes, the heating operation is crucial for ensuring product quality, as the primary processes occur in a hot state.

Types of Furnaces:

Initial Heating Furnace: Used to heat billets from room temperature to the processing temperature.

Reheating Furnace: Used to reheat billets during the process to the required processing temperature.

Importance of Heating:

Proper heating is essential to avoid defects such as cracks, folds, and surface imperfections on the outer surface of the pipes.

The primary furnace used is an annular furnace, which has a circular hearth. This design allows the billets to be slowly rotated and uniformly heated as they move through the furnace.

Heating Process:

The billets enter the furnace and are gradually heated to the processing temperature.

At the outlet, a reversing mechanism ensures the billets are uniformly soaked to the required temperature.

Impact on Quality:

Uniform heating is key to achieving the desired quality of the billets.

The temperature during the piercing process is particularly important, as it significantly affects the quality of the final product. Therefore, careful control of the billet temperature during piercing is essential.

By ensuring uniform and proper heating, the LSAW steel pipe production process can produce high-quality pipes that meet industry standards and specifications.