ZTZG pipe making machine, round to square welded pipe production line without changing roller.
Short Description:
This ZTZG’s jointly developed, designed, and manufactured
“Round-to-Square Tube Production Line Without Roller Change”
This type of welded pipe production line can produce round tubes, square tubes, and rectangular tubes without requiring roller changes.
Tube making machine : When producing round tubes of different specifications, the rough forming and fine forming rollers before welding are shared.
When producing square and rectangular tubes within a certain range, no roller changes are needed in the forming section before welding.
The sizing section adopts a misalignment adjustment method, allowing online adjustments to produce different specifications of square and rectangular tubes.
This type of steel pipe production equipment significantly reduces roller costs, improves production efficiency, and greatly enhances economic benefits for tube manufacturers!
This ZTZG’s jointly developed, designed, and manufactured
“Round-to-Square Tube Production Line Without Roller Change”
This type of welded pipe production line can produce round tubes, square tubes, and rectangular tubes without requiring roller changes.
Tube making machine
When producing round tubes of different specifications, the rough forming and fine forming rollers before welding are shared.
No Roller Changes
When producing square and rectangular tubes within a certain range, no roller changes are needed in the forming section before welding.
Sizing Section
The sizing section adopts a misalignment adjustment method, allowing online adjustments to produce different specifications of square and rectangular tubes.
This type of steel pipe production equipment significantly reduces roller costs, improves production efficiency, and greatly enhances economic benefits for tube manufacturers!
| ZTZG | Round-to-Square Roller-Share Welded Tube Mill — Common Production Specifications | ||||||
|---|---|---|---|---|---|---|
| Round-to-square process: the strip is first roll-formed and welded into a round pipe, then converted on-line into square / rectangular section; no roll or die change is required within the same tube mill — forming stands are adjusted on-line by electrical control. Standard material: low-carbon steel / galvanized steel strip. | ||||||
| Tube Mill Model | Round Pipe Range Φ (mm) | Square Pipe Size (mm) | Wall Thickness Range (mm) | Reference Line Speed (m/min) | Standard Length | Typical Applications |
| ERW20 | Φ8 – Φ20 | 6×6 – 15×15 | 0.3 – 1.5 | 120 | 6–12 m | Furniture tube, decorative tube, small square tube |
| ERW32 | Φ10 – Φ32 | 10×10 – 25×25 | 0.5 – 2.0 | 120 | 6–12 m | Guardrails, shelving, fitness equipment |
| ERW50 | Φ20 – Φ50 | 15×15 – 40×40 | 0.8 – 3.0 | 120 | 6–12 m | Shelving, mechanical structures, railings |
| ERW76 | Φ32 – Φ76 | 25×25 – 60×60 | 1.2 – 4.0 | 120 | 6–12 m | Secondary steel structures, curtain walls, agricultural machinery |
| ERW89 | Φ42 – Φ89 | 35×35 – 70×70 | 1.5 – 4.5 | 110 | 6–12 m | Steel structures, curtain-wall mullions, conveying equipment |
| ERW114 | Φ48 – Φ114 | 40×40 – 90×90 | 1.5 – 4.5 | 65 | 6–12 m | Building steel structures, bridge accessories, machine frames |
| ERW140 | Φ60 – Φ140 | 50×50 – 110×110 | 2.0 – 5.0 | 60 | 6–12 m | Steel structures, tower-crane parts, containers |
| ERW165 | Φ76 – Φ165 | 60×60 – 130×130 | 2.0 – 6.0 | 55 | 6–12 m | Heavy steel structures, columns, bridge supports |
| ERW219 | Φ114 – Φ219 | 80×80 – 180×180 | 3.0 – 8.0 | 40 | 6–12 m | Plant columns, steel main beams, tubular trusses |
| ERW406 | Φ219 – Φ406 | 170×170 – 330×330 | 6.0 – 16.0 | 30 | 6–12 m | Long-span steel structures, stadiums, high-rise buildings |
| ERW720 | Φ355 – Φ720 | 300×300 – 600×600 | 6.0 – 22.0 | 20 | 6–12 m | Heavy steel structures, bridges, super high-rise buildings |
| Process Description | Round-to-square process: the strip is roll-formed into a round pipe and welded, then converted on-line into square / rectangular section in the same mill (the square / rectangular forming stands are adjusted by electrical control). No rolls or dies have to be replaced when changing sizes — only the forming parameters and the cut-off length are adjusted; changeover time is typically 2–4 minutes. | |||||
| Material & Speed | The line speeds in this table are reference upper limits for low-carbon steel and galvanized strip (thin gauge, small sizes). For heavy wall thickness, large sizes, high-strength steel (Q355 and above) and stainless steel, reduce the speed by 15%–40% according to the material factor. | |||||
If you have any questions about the tube making machine, please feel free to contact us.
Phone / WhatsApp
+8615931058620
To learn more about other pipe making machine products, click the link below:
|
ERW TUBE MILL LINE |
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|
Model |
Round pipe mm |
Square pipe mm |
Thickness mm |
Working spead m/min |
|
|
ERW20 |
Ф8-Ф20 |
6x6-15×15 |
0.3-1.5 |
120 |
Read More |
|
ERW32 |
Ф10-Ф32 |
10×10-25×25 |
0.5-2.0 |
120 |
|
|
ERW50 |
Ф20-Ф50 |
15×15-40×40 |
0.8-3.0 |
120 |
|
|
ERW76 |
Ф32-Ф76 |
25×25-60×60 |
1.2-4.0 |
120 |
|
|
ERW89 |
Ф42-Ф89 |
35×35-70×70 |
1.5-4.5 |
110 |
|
|
ERW114 |
Ф48-Ф114 |
40×40-90×90 |
1.5-4.5 |
65 |
|
|
ERW140 |
Ф60-Ф140 |
50×50-110×110 |
2.0-5.0 |
60 |
|
|
ERW165 |
Ф76-Ф165 |
60×60-130×130 |
2.0-6.0 |
50 |
|
|
ERW219 |
Ф89-Ф219 |
70×70-170×170 |
2.0-8.0 |
50 |
|
|
ERW273 |
Ф114-Ф273 |
90×90-210×210 |
3.0-10.0 |
45 |
|
|
ERW325 |
Ф140-Ф325 |
110×110-250×250 |
4.0-12.7 |
40 |
|
|
ERW377 |
Ф165-Ф377 |
130×130-280×280 |
4.0-14.0 |
35 |
|
|
ERW406 |
Ф219-Ф406 |
170×170-330×330 |
6.0-16.0 |
30 |
|
|
ERW508 |
Ф273-Ф508 |
210×210-400×400 |
6.0-18.0 |
25 |
Read More |
|
ERW660 |
Ф325-Ф660 |
250×250-500×500 |
6.0-20.0 |
20 |
Read More |
|
ERW720 |
Ф355-Ф720 |
300×300-600×600 |
6.0-22.0 |
20 |
Read More |
|
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 |
Read More |
|
SS32 |
Ф6-Ф32 |
5×5-25×25 |
0.2-1.0 |
10 |
Read More |
|
SS51 |
Ф9-Ф51 |
7×7-40×40 |
0.2-1.5 |
10 |
Read More |
|
SS64 |
Ф12-Ф64 |
10×10-50×50 |
0.3-2.0 |
10 |
Read More |
|
SS76 |
Ф25-Ф76 |
20×20-60×60 |
0.3-2.0 |
10 |
Read More |
|
SS114 |
Ф38-Ф114 |
30×30-90×90 |
0.4-2.5 |
10 |
Read More |
|
SS168 |
Ф76-Ф168 |
60×60-130×130 |
1.0-3.5 |
10 |
Read More |
|
SS219 |
Ф114-Ф219 |
90×90-170×170 |
1.0-4.0 |
10 |
Read More |
|
SS325 |
Ф219-Ф325 |
170×170-250×250 |
2.0-8.0 |
3 |
Read More |
|
SS426 |
Ф219-Ф426 |
170×170-330×330 |
3.0-10.0 |
3 |
Read More |
|
SS508 |
Ф273-Ф508 |
210×210-400×400 |
4.0-12.0 |
3 |
Read More |
|
SS862 |
Ф508-Ф862 |
400×400-600×600 |
6.0-16.0 |
2 |
Read More |
