Shandong Dorco Heavy Machinery Co., Ltd.
Shandong Dorco Heavy Machinery Co., Ltd.
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Straight Seam Welded Pipe Unit Spiral Weld Pipe Mill High Precision Automated Control
The straight seam welded pipe unit produced by Duolek is a mature industrial pipe manufacturing equipment, relying on years of technological accumulation and process optimization, with stable and reliable performance advantages.
▶ High frequency straight seam welded pipe unit
The unit adopts an internationally advanced forming system, which has a series of advantages such as stable forming, good surface quality of steel pipes, convenient specification changes, advanced technology, reliable equipment, complete process and mature production.
Production material: The widest 1500mm strip steel is used as the production material, with low strip steel content.
Forming process: Using a cold forming process with multiple rollers, the two ends of the strip steel are compressed and aligned with each other. The advantage is that the forming method is uninterrupted and continuously fastened
▶ Submerged arc straight seam welded pipe unit
This unit is a specialized equipment for producing straight seam welded pipes in industries such as metallurgy, petroleum, and construction. By adopting mature and reliable advanced processes and equipment, we ensure that product quality, cost, and various consumption indicators reach advanced levels, and have strong competitiveness in terms of quality and price.
Production materials: The narrowest 1250mm is used to produce coils, medium plates, and medium thick plates.
Forming process: JCOE cold stamping forming, which is characterized by gradually forming sheet metal in units of 50mm.
▶ Fully automatic steel pipe hydrostatic testing machine
The Duolek fully automatic steel pipe hydrostatic testing machine is the main inspection equipment for welded pipe production. It adopts PLC control, and each part of the work process is automatically completed in sequence, with the function of automatic recording of test result parameters.
▶ Fully automatic flat head chamfering machine
The chamfering machine is one of the auxiliary machines of the welded pipe unit, dedicated to processing the groove of the steel pipe end and leveling the steel pipe end for on-site welding.
Steel pipe diameter: φ20mm-φ3500mm.
▶ Ultrasonic flaw detector:
Take the initiative to alarm and spray marks if there are shortcomings, and workers adjust parameters accordingly;
The parts with continuous ultrasonic testing marks on the weld seam shall undergo manual ultrasonic and X-ray re inspection again;
Defects will be repaired and undergo non-destructive testing again until they are confirmed to be cleared;
▶ X ray
The Duolek heavy industry X-ray equipment can not only detect hidden welding points of various welded pipes, but also intelligently analyze the detection results, providing an effective detection method for achieving the goals of "first pass rate" and "zero defects".
| 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 divided by purpose
| 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 |
| Note: Besides the above specifications, production can also be customized according to customer requirements | |||
▶ Straight Seam Welded Pipe Unit Application Scope:
▶ Why choose us?
Since its establishment in 2002, Condor Heavy Industries has successfully operated its equipment in more than 20 countries and has dealers involved.According to Chinese export customs data, Duolek's related equipment ranks among the top ten in the industry, which means reliable quality and price.
With 21 years of manufacturing and export experience, Duolek supports the design and customization of equipment on demand, provides equipment configuration details and parameter guidance, and guarantees subsequent production quality and equipment adjustment. Here, you can get professional advice for your needs.
▶ Customer factory inspection communication:
▶ Our Clients Say
▶ Duolek Factory Common inquiry
Q:What information we need customers to provide?
A:Duolek has R&D Center to focus on the study for new product. We can design and make the change as customer’s requirements. We keep an opened mind to service our customers.
Q:What’s your quality control system?
A:We operate ISO9001 Quality Management System. We control our products quality by our workshop processes: Materials incoming inspection, Machining process control, finished testing and Inspection before packing. Each step has inspector and the testing results will be recorded for checking.
Q:What kind of payment terms do you accept?
A:We prefer T/T through bank. 30% when order is confirmed and 70% before shipment. L/C is also acceptable for amount over 200,000USD.
Q:What is your warranty policy?
A:All our products are warranted for one full year from date of delivery against defects in materials and workmanship.This warranty does not cover parts that are worn out through the course of normal operation