The mill is intended for manufacturing of round pipe of Φ50.8mm-Φ152.4mm with thickness of 3.6mm–6.0mm from cold-rolled and hot-rolled coil strip by means of unclosed tubular blank with its subsequent welding into tube, edge heating by means of solid state high-frequency welder, longitudinal seam welding in rolls of tube welding machine, cooling, further sizing or shaping and on-stream cutting of endless tube in measured lengths.

Finished product will be of round pipe.

The manufacturing process provides for the uses of coiled strip precut in required width sizes in slitting machine.

 

II. The technical flow of the production line

{SteelTape}→→ Double-head un-coiler→→Five-roll Flattener →→Strip-head Cutter and welder→→Horizontal spiral accumulater →→Forming section(Flattening unit +Main driving unit +Forming unit +Guide unit +High frequency induction welding unit +squeeze roller)+ De-burr frame →→Cooling unit →→ Sizing unit and straightener →→Flying saw under computer-control →→ Run-out table

 

III. Basic conditions:

a) Steel Pipe Specification

1. Round Pipe diameter:        Φ50.8mm-Φ152.4mm

2. Pipe Thickness:             3.6 – 6.0mm

3. Pipe Length:                6.0m – 12.0m

4. Length Tolerance:           0-6mm

b) SteelTape Specification

1. Material:      API 5L:A, B, X42, X46 (δb≤758Mpa, δs≤524Mpa)

2. Steel Tape: Inner diameter:    Φ600-800mm

Outer diameter:    Φmax=1800mm

Strip steel width:    160mm-480mm

Strip steel thickness:   3.6mm-6.0mm

The maximum weight:  6.0 tons

c) Electric installed capacity:       appro. 850KW

d) Size of the whole line:           appro. 90X10m

e) Line Speed:                    10-50m/min