Shandong Dorco Heavy Machinery Co., Ltd.
Shandong Dorco Heavy Machinery Co., Ltd.
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DORCO mature spiral welded pipe production line:
After years of practice and continuous improvement, the technology is mature and reliable, with significant advantages such as stable molding, high degree of automation, low energy consumption, and high production efficiency. The unit provides two modes of production: front swing intermittent production and rear swing continuous production. The rear swing continuous production line is designed specifically for efficient production of oil and gas pipelines.
Core technology and process support:
Efficient spatial layout: Adopting double swing bridge technology, the swing design is reasonable, greatly saving space and improving production efficiency.
Source quality control: Conduct strict physical and chemical inspections on raw materials to ensure product quality from the source.
Advanced welding technology: Adopting advanced welding technology and equipment. Both internal and external welding are equipped with Lincoln welding machines from the United States, which support single or double wire submerged arc welding to ensure highly stable and reliable welding quality.
Precision cutting: Use an air plasma cutting machine to cut steel pipes to length.
Full process quality inspection: Implement strict batch inspection system. Each batch of steel pipes must undergo comprehensive inspections such as welding seam mechanical properties, chemical composition, fusion condition, steel pipe surface quality, and non-destructive testing to ensure that the pipe manufacturing process is fully qualified before it can be officially put into production.
Key supporting testing and finishing equipment:
Automatic steel pipe hydrostatic testing machine:
Function: Conduct hydrostatic strength test on steel pipes.
Features: Large working stroke, able to apply maximum working force stably throughout the entire stroke; Smooth operation, no significant impact or noise, improved working conditions, and no environmental pollution.
Specification: Pipe diameter covering 20-3500mm; Test pressure range 10-110Mpa.
Compliant with standards: API-5L, API-5CT, BS1387-85, ASTM, GB9711, etc.
Fully automatic flat head chamfering machine:
Function: Used for blunting the end face of steel pipes and processing grooves at specified angles, it is a key equipment in the finishing area of welded pipe production lines.
Specification: Pipe diameter covering 20-3500mm; Wall thickness processing capacity 1-60mm.
Compliant with standards: API-5L, API-5CT, BS1387-85, ASTM, GB9711, etc.
Non destructive testing system:
Online continuous ultrasonic testing: Immediately after welding, 100% non-destructive testing is carried out using an online ultrasonic testing instrument. Automatic alarm and spray marking are triggered upon discovering defects, and operators adjust process parameters in a timely manner based on this.
X-ray steel pipe inspection:
Perform manual ultrasonic and X-ray re examination on the marked areas of ultrasonic testing.
If defects are found, they must be repaired and undergo non-destructive testing again until it is confirmed that the defects are completely eliminated.
The T-joint section where the strip steel butt weld and spiral weld intersect must undergo X-ray television or film inspection.
| Model | Specification(mm) | Coil weight (ton) | Coil width(mm) | Thickness(mm) | Capacity(KW) | Area(m2) |
| DRC-400 | φ219-φ426 | 10 | 400-750 | 5-8 | 150 | 18*72 |
| DRC-500 | φ219-φ529 φ219-φ720 | 15 | 400-800 | 5-10 | 180 | 18*72 |
| DRC-600 | φ219-φ630 | 15 | 450-1050 | 6-10 | 190 | 21*72 |
| DRC-700 | φ219-φ720 | 15 | 500-1250 | 5-12.7 | 210 | 21*72 |
| DRC-800 | φ219-φ820 | 20 | 500-1300 | 6-12.7 | 220 | 24*78 |
| DRC-1000 | φ219-φ1020 | 20 | 500-1560 | 6-12.7 | 220 | 24*78 |
| DRC-1400 | Φ325-φ1420 | 25 | 500-1560 | 6-18 | 400 | 24*120 |
| DRC-1600 | Φ426-φ1620 | 30 | 1100-1600 | 6-20 | 400 | 24*120 |
| DRC-1800 | φ508-φ1820 | 30 | 1200-1600 | 8-25.4 | 500 | 24*180 |
| DRC-2000 | φ508-φ2020 | 30 | 1200-2000 | 8-25.4 | 550 | 24*180 |
| DRC-2400 | φ508-φ2400 | 30 | 1200-2000 | 8-25.4 | 600 | 24*200 |
| DRC-3000 | φ508-φ3000 | 30 | 1200-2000 | 8-25.4 | 700 | 24*200 |
High and low pressure fluid conveying pipes: high strength, able to withstand large impact forces, smooth inner walls, and high transportation efficiency.
Pile pipes for urban construction: used for supporting and framing building structures to ensure project safety and stability.
Industrial structural pipes: resistant to high temperature and corrosion, can be used in harsh environments, and have a short construction period.
Electricity/heat/gas pipelines: not easily deformed or broken, long service life, strong sealing, ensuring safe operation of pipelines.
The Product Technical Support and Services for the Spiral Weld Pipe Mill include:
- Installation guidance and support
- Operator training and maintenance services
- Troubleshooting assistance
- Spare parts supply
- Regular maintenance programs
