Steel Round Pipe Production Line;High-Frequency ERW Pipe Mill
The round pipe production line (welded pipe mill) is an automated system designed to continuously process steel coils or strips into straight-seam round pipes. Commonly known in the industry as a “pipe-making machine,” the mainstream technology used is High-Frequency Electric Resistance Welding (ERW). It serves as the primary production equipment for scaffolding pipes, fluid transport pipes, structural pipes, guardrail pipes, and round pipes for photovoltaic (PV) mounting systems; by changing the tooling (molds), it can also produce square and rectangular pipes.
I. Production Line Composition and Process Flow
Process Flow:
Coil Loading → Uncoiling → Leveling → Shearing & Butt-Welding → Accumulator (Looping) → Roll Forming → High-Frequency Welding → Internal & External Bead Removal → Weld Seam Annealing (Optional) → Cooling → Sizing → Straightening → Flying Saw Cut-to-Length → Discharge Inspection → Bundling & Warehousing
II. Production Line Classification and Application Scope
By Pipe Diameter Specification:
- • Small-diameter mill: φ6–φ76mm; for thin-walled furniture pipes and guardrail pipes; high speed (up to 80–120 m/min).
- • Medium-diameter mill: φ76–φ219mm; for scaffolding and fluid transport pipes; most common type on the market.
- • Large-diameter mill: φ219–φ325mm and above; for steel structures, pile foundations, and oil/gas transport pipes.
III. Applications of Finished Products
Scaffolding pipes, fluid transport pipes (water supply/drainage), round pipes for steel structures, guardrail pipes, PV mounting pipes, automotive round pipes, API oil and gas transport pipes, pressure vessel pipes, etc.
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ERW TUBE MILL LINE |
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Model |
Round pipe mm |
Square pipe mm |
Thickness mm |
Working spead m/min |
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ERW20 |
Ф8-Ф20 |
6x6-15×15 |
0.3-1.5 |
120 |
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ERW32 |
Ф10-Ф32 |
10×10-25×25 |
0.5-2.0 |
120 |
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ERW50 |
Ф20-Ф50 |
15×15-40×40 |
0.8-3.0 |
120 |
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ERW76 |
Ф32-Ф76 |
25×25-60×60 |
1.2-4.0 |
120 |
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ERW89 |
Ф42-Ф89 |
35×35-70×70 |
1.5-4.5 |
110 |
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ERW114 |
Ф48-Ф114 |
40×40-90×90 |
1.5-4.5 |
65 |
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ERW140 |
Ф60-Ф140 |
50×50-110×110 |
2.0-5.0 |
60 |
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ERW165 |
Ф76-Ф165 |
60×60-130×130 |
2.0-6.0 |
50 |
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ERW219 |
Ф89-Ф219 |
70×70-170×170 |
2.0-8.0 |
50 |
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ERW273 |
Ф114-Ф273 |
90×90-210×210 |
3.0-10.0 |
45 |
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ERW325 |
Ф140-Ф325 |
110×110-250×250 |
4.0-12.7 |
40 |
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ERW377 |
Ф165-Ф377 |
130×130-280×280 |
4.0-14.0 |
35 |
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ERW406 |
Ф219-Ф406 |
170×170-330×330 |
6.0-16.0 |
30 |
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ERW508 |
Ф273-Ф508 |
210×210-400×400 |
6.0-18.0 |
25 |
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ERW660 |
Ф325-Ф660 |
250×250-500×500 |
6.0-20.0 |
20 |
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ERW720 |
Ф355-Ф720 |
300×300-600×600 |
6.0-22.0 |
20 |
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STAINLESS STEEL PIPE PRODUCTION LINE |
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|
Model |
Round pipe mm |
Square pipe mm |
Thickness mm |
Working speed m/min |
|
|
SS25 |
Ф6-Ф25 |
5×5-20×20 |
0.2-0.8 |
10 |
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SS32 |
Ф6-Ф32 |
5×5-25×25 |
0.2-1.0 |
10 |
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SS51 |
Ф9-Ф51 |
7×7-40×40 |
0.2-1.5 |
10 |
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SS64 |
Ф12-Ф64 |
10×10-50×50 |
0.3-2.0 |
10 |
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SS76 |
Ф25-Ф76 |
20×20-60×60 |
0.3-2.0 |
10 |
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SS114 |
Ф38-Ф114 |
30×30-90×90 |
0.4-2.5 |
10 |
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|
SS168 |
Ф76-Ф168 |
60×60-130×130 |
1.0-3.5 |
10 |
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SS219 |
Ф114-Ф219 |
90×90-170×170 |
1.0-4.0 |
10 |
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|
SS325 |
Ф219-Ф325 |
170×170-250×250 |
2.0-8.0 |
3 |
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SS426 |
Ф219-Ф426 |
170×170-330×330 |
3.0-10.0 |
3 |
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|
SS508 |
Ф273-Ф508 |
210×210-400×400 |
4.0-12.0 |
3 |
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|
SS862 |
Ф508-Ф862 |
400×400-600×600 |
6.0-16.0 |
2 |
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