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High Precision Straight Seam Welded Pipe Unit with Φ355 - Φ720 Mm Diameter and 6 - 22 Mm Thickness for Construction Pipe Piles
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High Precision Straight Seam Welded Pipe Unit with Φ355 - Φ720 Mm Diameter and 6 - 22 Mm Thickness for Construction Pipe Piles

MOQ: 1 set
Price: 200000 - 1190000 USD per set
Standard Packaging: After being wrapped with stretch film, it is shipped unpacked in the container.
Delivery Period: 45 - 75 working days
Payment Method: ,L/C,T/T
Detail Information
Product Description
Detail Information
Place of Origin
Qingdao, China
Brand Name
Duolek
Model Number
ZFHGJ
Features:
Easy To Change Specifications
Model:
DRC - 720 Straight Seam Welded Pipe Unit
Round Pipe ( Mm ):
Φ 355 - Φ 720
Square Pipe ( Mm ):
300 X 300 - 600 X 600
Thickness ( Mm ):
6 - 22
Speed ( M / Min ):
20
Usage:
Construction (pipe Pile)
External Diameter (mm):
350 - 1600 (14" - 63")
Width (mm):
6 - 60 (1/4" - 2.36")
Length (m):
6 - 12
Name:
Straight Seam Welded Pipe Unit
Highlight:

Φ355 - Φ720 Mm Straight Seam Welded Pipe Unit

,

6 - 22 Mm Thickness Straight Seam Welded Pipe Unit

,

20 M/Min Speed Straight Seam Welded Pipe Unit

Product Description
High Precision Straight Seam Submerged Arc Welded Pipe Unit Round Pipe Φ355 - 720 Mm
High Frequency Straight Seam Welded Pipe Unit

This production line is specialized equipment for manufacturing straight seam welded pipes used in metallurgy, petroleum, construction, transportation, machinery, and vehicle industries. Using hot-rolled steel strips as raw material, it produces round and rectangular pipes of required specifications through cold bending and high-frequency welding methods.

The production line employs mature, reliable, and economically efficient processes to ensure product quality, cost-effectiveness, and competitive consumption metrics. The resulting pipes offer exceptional quality-to-price ratio.

Production Line Process Flow
  • Raw material (strip steel coil)
  • Uncoiling
  • Storage
  • Passive leveling
  • Forming and rolling
  • High-frequency welding
  • Removal of external burrs
  • Zinc replenishment
  • Spray cooling
  • Sizing and shaping
  • Rough straightening
  • Cutting to length
  • Pipe collection and bundling
Straight Seam Submerged Arc Welded Pipe Unit

The process involves opening and leveling steel plates after longitudinal cutting, then feeding them into the forming machine. Using fully automated flexible forming with precise control, the steel plate is bent into circular pipes using rollers. The pipes are pre-welded with gas shielded welding, then undergo submerged arc welding for inner and outer welds offline. Final steps include water pressure testing, flat head chamfering, weld and pipe body inspection to produce qualified submerged arc welded pipes.

Technical Specifications
Model Round Pipe (mm) Square Pipe (mm) Thickness (mm) Speed (m/min)
DRC-12 Φ4-Φ12 / 0.2-0.5 120
DRC-16 Φ6-Φ16 / 0.2-0.8 120
DRC-20 Φ8-Φ20 6x6-15x15 0.3-1.0 120
DRC-25 Φ10-Φ25 7x7-19x19 0.3-1.5 120
DRC-32 Φ12-Φ32 9x9-25x25 0.5-2.0 120
DRC-50 Φ20-Φ50 15x15-39x39 0.8-3.0 120
DRC-76 Φ32-Φ76 25x25-59x59 1.2-4.0 120
DRC-89 Φ42-Φ89 35x35-70x70 1.5-4.5 110
DRC-114 Φ48-Φ114 40x40-90x90 1.5-4.5 70
DRC-140 Φ60-Φ140 50x50-110x110 2.0-5.0 60
DRC-165 Φ76-Φ165 60x60-130x130 2.0-6.0 55
DRC-219 Φ89-Φ219 70x70-170x170 2.0-8.0 50
DRC-273 Φ114-Φ273 90x90-210x210 3.0-10.0 45
DRC-325 Φ140-Φ325 110x110-250x250 4.0-12.7 40
DRC-377 Φ165-Φ377 130x130-280x280 4.0-14.0 35
DRC-406 Φ219-Φ406 170x170-330x330 6.0-16.0 30
DRC-508 Φ273-Φ508 210x210-400x400 6.0-18.0 25
DRC-660 Φ325-Φ660 250x250-500x500 6.0-20.0 20
DRC-720 Φ355-Φ720 300x300-600x600 6.0-22.0 20
Size Range by Application
Usage External Diameter (mm) Weight (mm) Length (m)
Oil and gas pipelines 406 - 1524 (16" - 60") 6 - 40 (1/4" - 1.57") 8 - 12.1
Construction (pipe pile) 350 - 1600 (14" - 63") 6 - 60 (1/4" - 2.36") 6 - 12
Rolling tube 1200 - 3800 (47.24" - 150") 12 - 120 (1/2" - 4.7") ≤3.2

Custom specifications available according to customer requirements

High Precision Straight Seam Welded Pipe Unit with Φ355 - Φ720 Mm Diameter and 6 - 22 Mm Thickness for Construction Pipe Piles 0 High Precision Straight Seam Welded Pipe Unit with Φ355 - Φ720 Mm Diameter and 6 - 22 Mm Thickness for Construction Pipe Piles 1
Application Scope

Specialized equipment for producing straight seam welded pipes in industries including metallurgy, petroleum, construction, transportation, machinery, and vehicles.

High Precision Straight Seam Welded Pipe Unit with Φ355 - Φ720 Mm Diameter and 6 - 22 Mm Thickness for Construction Pipe Piles 2
Customer Factory Inspection
High Precision Straight Seam Welded Pipe Unit with Φ355 - Φ720 Mm Diameter and 6 - 22 Mm Thickness for Construction Pipe Piles 3
Frequently Asked Questions
What information do we need customers to provide?

Duolek has an R&D Center focused on product development. We can design and modify products according to customer requirements, maintaining an open approach to customer service.

What's your quality control system?

We operate an ISO9001 Quality Management System. Our quality control includes materials inspection, machining process control, finished product testing, and pre-shipment inspection. Each step has dedicated inspectors with recorded test results.

What payment terms do you accept?

We prefer bank transfer (T/T): 30% deposit with order confirmation and 70% before shipment. Letters of Credit (L/C) are accepted for orders over $200,000 USD.

What is your warranty policy?

All products carry a one-year warranty from delivery date against defects in materials and workmanship. Normal wear and tear are not covered.

Tags: 

spiral welded pipe mill,  

pipe rolling mill,  

Erw Pipe Mill

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Products
PRODUCTS DETAILS
Products

Ring Rolling Machine

Vertical Ring Rolling Machine

Horizontal Ring Rolling Machine

Spiral Weld Pipe Mill

Forging Screw Press
Name
  • Name
  • Name
  • Name
  • Name
  • Name
High Precision Straight Seam Welded Pipe Unit with Φ355 - Φ720 Mm Diameter and 6 - 22 Mm Thickness for Construction Pipe Piles
MOQ: 1 set
Price: 200000 - 1190000 USD per set
Standard Packaging: After being wrapped with stretch film, it is shipped unpacked in the container.
Delivery Period: 45 - 75 working days
Payment Method: ,L/C,T/T
Detail Information
Product Description
Detail Information
Place of Origin
Qingdao, China
Brand Name
Duolek
Model Number
ZFHGJ
Features:
Easy To Change Specifications
Model:
DRC - 720 Straight Seam Welded Pipe Unit
Round Pipe ( Mm ):
Φ 355 - Φ 720
Square Pipe ( Mm ):
300 X 300 - 600 X 600
Thickness ( Mm ):
6 - 22
Speed ( M / Min ):
20
Usage:
Construction (pipe Pile)
External Diameter (mm):
350 - 1600 (14" - 63")
Width (mm):
6 - 60 (1/4" - 2.36")
Length (m):
6 - 12
Name:
Straight Seam Welded Pipe Unit
Minimum Order Quantity:
1 set
Price:
200000 - 1190000 USD per set
Packaging Details:
After being wrapped with stretch film, it is shipped unpacked in the container.
Delivery Time:
45 - 75 working days
Payment Terms:
,L/C,T/T
Highlight

Φ355 - Φ720 Mm Straight Seam Welded Pipe Unit

,

6 - 22 Mm Thickness Straight Seam Welded Pipe Unit

,

20 M/Min Speed Straight Seam Welded Pipe Unit

Product Description
High Precision Straight Seam Submerged Arc Welded Pipe Unit Round Pipe Φ355 - 720 Mm
High Frequency Straight Seam Welded Pipe Unit

This production line is specialized equipment for manufacturing straight seam welded pipes used in metallurgy, petroleum, construction, transportation, machinery, and vehicle industries. Using hot-rolled steel strips as raw material, it produces round and rectangular pipes of required specifications through cold bending and high-frequency welding methods.

The production line employs mature, reliable, and economically efficient processes to ensure product quality, cost-effectiveness, and competitive consumption metrics. The resulting pipes offer exceptional quality-to-price ratio.

Production Line Process Flow
  • Raw material (strip steel coil)
  • Uncoiling
  • Storage
  • Passive leveling
  • Forming and rolling
  • High-frequency welding
  • Removal of external burrs
  • Zinc replenishment
  • Spray cooling
  • Sizing and shaping
  • Rough straightening
  • Cutting to length
  • Pipe collection and bundling
Straight Seam Submerged Arc Welded Pipe Unit

The process involves opening and leveling steel plates after longitudinal cutting, then feeding them into the forming machine. Using fully automated flexible forming with precise control, the steel plate is bent into circular pipes using rollers. The pipes are pre-welded with gas shielded welding, then undergo submerged arc welding for inner and outer welds offline. Final steps include water pressure testing, flat head chamfering, weld and pipe body inspection to produce qualified submerged arc welded pipes.

Technical Specifications
Model Round Pipe (mm) Square Pipe (mm) Thickness (mm) Speed (m/min)
DRC-12 Φ4-Φ12 / 0.2-0.5 120
DRC-16 Φ6-Φ16 / 0.2-0.8 120
DRC-20 Φ8-Φ20 6x6-15x15 0.3-1.0 120
DRC-25 Φ10-Φ25 7x7-19x19 0.3-1.5 120
DRC-32 Φ12-Φ32 9x9-25x25 0.5-2.0 120
DRC-50 Φ20-Φ50 15x15-39x39 0.8-3.0 120
DRC-76 Φ32-Φ76 25x25-59x59 1.2-4.0 120
DRC-89 Φ42-Φ89 35x35-70x70 1.5-4.5 110
DRC-114 Φ48-Φ114 40x40-90x90 1.5-4.5 70
DRC-140 Φ60-Φ140 50x50-110x110 2.0-5.0 60
DRC-165 Φ76-Φ165 60x60-130x130 2.0-6.0 55
DRC-219 Φ89-Φ219 70x70-170x170 2.0-8.0 50
DRC-273 Φ114-Φ273 90x90-210x210 3.0-10.0 45
DRC-325 Φ140-Φ325 110x110-250x250 4.0-12.7 40
DRC-377 Φ165-Φ377 130x130-280x280 4.0-14.0 35
DRC-406 Φ219-Φ406 170x170-330x330 6.0-16.0 30
DRC-508 Φ273-Φ508 210x210-400x400 6.0-18.0 25
DRC-660 Φ325-Φ660 250x250-500x500 6.0-20.0 20
DRC-720 Φ355-Φ720 300x300-600x600 6.0-22.0 20
Size Range by Application
Usage External Diameter (mm) Weight (mm) Length (m)
Oil and gas pipelines 406 - 1524 (16" - 60") 6 - 40 (1/4" - 1.57") 8 - 12.1
Construction (pipe pile) 350 - 1600 (14" - 63") 6 - 60 (1/4" - 2.36") 6 - 12
Rolling tube 1200 - 3800 (47.24" - 150") 12 - 120 (1/2" - 4.7") ≤3.2

Custom specifications available according to customer requirements

High Precision Straight Seam Welded Pipe Unit with Φ355 - Φ720 Mm Diameter and 6 - 22 Mm Thickness for Construction Pipe Piles 0 High Precision Straight Seam Welded Pipe Unit with Φ355 - Φ720 Mm Diameter and 6 - 22 Mm Thickness for Construction Pipe Piles 1
Application Scope

Specialized equipment for producing straight seam welded pipes in industries including metallurgy, petroleum, construction, transportation, machinery, and vehicles.

High Precision Straight Seam Welded Pipe Unit with Φ355 - Φ720 Mm Diameter and 6 - 22 Mm Thickness for Construction Pipe Piles 2
Customer Factory Inspection
High Precision Straight Seam Welded Pipe Unit with Φ355 - Φ720 Mm Diameter and 6 - 22 Mm Thickness for Construction Pipe Piles 3
Frequently Asked Questions
What information do we need customers to provide?

Duolek has an R&D Center focused on product development. We can design and modify products according to customer requirements, maintaining an open approach to customer service.

What's your quality control system?

We operate an ISO9001 Quality Management System. Our quality control includes materials inspection, machining process control, finished product testing, and pre-shipment inspection. Each step has dedicated inspectors with recorded test results.

What payment terms do you accept?

We prefer bank transfer (T/T): 30% deposit with order confirmation and 70% before shipment. Letters of Credit (L/C) are accepted for orders over $200,000 USD.

What is your warranty policy?

All products carry a one-year warranty from delivery date against defects in materials and workmanship. Normal wear and tear are not covered.

Tags: 

spiral welded pipe mill,

pipe rolling mill,

Erw Pipe Mill

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