High speed tube mill production line
The manufacturing pipe mill process or High Frequency EW Pipe Mill Production Line generally involves the following stages in a
step by step procedure.
• Slitting
• Uncoiling
• Forming
• Welding
• De beading
• Seam Annealing
Sizing
• Cutting
Galvanizing (zink spray)
High frequency straight seam pipe making machine
1. Slitting
Coils slit to predetermine widths for each size of pipes.
2. Uncoiling
The slitted coil uncoils at the entry of tube mill line and the ends shear and weld one
after another. LOTOS is able to offer the largest range of decoilers from manual to fully
automatic, according to a range of strip widths and thicknesses.
3. Accumulator
The main action of the accumulator is to accumulate a steel strip to keep continuously
and automatically production in the welding pipe line.
4. Forming
The slitted coils are formed into a cylindrical shape with open edges utilizing a series
of forming rolls.
5. Welding
In this stage, the open edges heate to the forging temperature through high-
frequency, low-voltage, high current and press welded by forge rolls making perfect
and strong.
6. Sizing
After water quenching, a little decrease applies to pipes with sizing rolls. This results in
producing the desirable precise outside diameter.
Post time: Feb-10-2023