Shandong Dorco Heavy Machinery Co., Ltd.
Shandong Dorco Heavy Machinery Co., Ltd.
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Low Production Cost Spiral Weld Pipe Mill High Frequency Erw Pipe Mill Line Steady Operation
DORCO Longitudinal Seam Welded Pipe Mill
A mature industrialized pipe manufacturing system, built on years of technical expertise and process optimization, delivering stable and reliable performance advantages.
High-Frequency Longitudinal Seam Welded Pipe Mill
This mill incorporates internationally advanced forming systems, offering advantages such as stable forming, superior pipe surface quality, easy specification changes, advanced technology, reliable equipment, refined processes, and mature production.
Material: Uses ultra-wide 1500mm steel strips with low carbon content.
Forming Process: Multi-roller cold forming technology that continuously squeezes and aligns strip edges, ensuring uninterrupted forming and fastening.
Fastening Method: Utilizes high-frequency electrical current to rapidly heat the strip edges, enabling self-fusion under external force.
Submerged Arc Longitudinal Seam Welded Pipe Mill
Specialized equipment for producing longitudinal welded pipes in metallurgy, petroleum, construction, and other industries. It employs proven advanced processes and equipment to ensure product quality, cost efficiency, and consumption metrics meet leading standards, ensuring strong competitiveness in both quality and pricing.
Material: Uses narrower 1250mm steel coils, medium plates, and thick plates.
Forming Process: JCOE cold stamping formation, gradually shaping plates in 50mm increments.
Fastening Method: Filler material fastening via electrothermal impact between welding wire and plate edges.
Fully Automatic Pipe Hydrostatic Tester
A primary inspection device for welded pipe production, featuring PLC-controlled automated workflows (feeding, clamping, water filling, pressure boosting, pressure holding, pressure release, discharging) and automatic test parameter recording.
Pipe Diameter: Φ20–Φ3500mm
Test Pressure: 10–110MPa
Sealing Types: Radial sealing or end-face sealing.
Fully Automatic Pipe Facing and Chamfering Machine
An auxiliary machine for processing pipe end bevels and flattening ends for field welding compatibility.
Pipe Diameter: Φ20mm–Φ3500mm
Φ60mm–Φ339.7mm Range: Step-feeding high-speed facing and chamfering machine, ideal for petroleum casing and ERW pipe manufacturers.
Ultrasonic Flaw Detector
Automatically alarms and marks defects for parameter adjustments.
Weld sections with continuous UT marks undergo manual ultrasonic and X-ray re-inspection.
Repaired defects undergo repeated NDT until fully eliminated.
X-Ray Inspection
DORCO Heavy Industry’s X-ray equipment detects hidden weld spots in welded pipes and intelligently analyzes results, supporting the goals of "first-pass qualification" and "zero defects."
Applications
This production line serves as specialized equipment for manufacturing longitudinal welded pipes in metallurgy, petroleum, construction, transportation, machinery, vehicle, and related industries.
| 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, Dorco'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, Dorco 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
▶ DORCO Factory Common inquiry
Q:What information we need customers to provide?
A:Dorco 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