DELLOK Helical Heat Exchanger Serrated 0.8mm Steel Fin Tube - 19mm OD, 18m Length for HRSG Boiler Applications
Price:
N/A Contact us for details
MOQ:
N/A Contact us for details
Delivery Time:
Ex-work within 1 month on recepit of order.
Brand:
DELLOK
Product Description
Product Overview
DELLOK Helical Heat Exchanger serrated 0.8mm round steel tubing features high-frequency resistance welded helical steel fin tubes designed for efficient heat transfer in industrial applications.
Key Specifications
- Tube OD: 19mm minimum
- Tube Length: 18 meters maximum
- Fin Height: 32mm maximum
- Fin Thickness: 0.8mm minimum
- Fin Pitch: 4mm for solid fins, 3.3mm for serrated fins
- Daily Production Capacity: Up to 40 tons
Manufacturing Process
The fin strip is continuously welded and spirally wound onto a polished bare tube using high-frequency resistance welding technique, ensuring strong mechanical bonding between tube and fin materials.
Available Fin Types
- Solid plain helical fins
- Serrated helical fins
- Hairpin tubes with bending capabilities
Quality Assurance & Testing
- High frequency welding machine: 200KW or 300KW power supply
- Hydrostatic or pneumatic pressure testing
- Tensile tests for mechanical bonding verification
- Compliance with international standards and client specifications
- Comprehensive visual and dimensional inspections
- Bending checks for ovality and thickness reduction
Material Specifications
| Component | Available Materials | Popular ASTM Materials |
|---|---|---|
| Core Tube | Carbon Steel, Alloy Steel, Heat Resistant Steel, Stainless Steel | SA179, SA106B/C, SA192, TP304/304L, TP316/316L, T11, T22, T91 |
| Fins | Carbon Steel, Alloy Steel, Heat Resistant Steel, Stainless Steel | Q235-BF, 08F, 1Cr18Ni9Ti, TP304/304L, TP316/316L |
Production Range
| Parameter | Solid Fins (Min-Max) | Serrated Fins (Min-Max) |
|---|---|---|
| Tube OD (mm) | 19-219 | 19-219 |
| Fin Height (mm) | 8-26 | 8-32 |
| Fin Thickness (mm) | 0.8-2.8 | 1-1.6 |
| Fin Density (mm) | 4-20 | 3.3-20 |
| Tube Length (mm) | Up to 18000 | Up to 18000 |
Applications
High Frequency Resistance Welded Helical Fin Tubes are widely used in:
- Waste heat recovery from boiler flue gas
- Heat exchangers and boilers
- Economizers and pre-heaters
- Coolers and heat pipes
- Fired heaters and industrial heating systems
Additional Services
- Tube swaging process for joint connections
- Spacer rings (steel material)
- Combined solid and serrated fins on same tube
- Protective coatings: Red oxide zinc phosphate primer (external) and VCI corrosion inhibitor (internal)
- Fin end bevel finishing (30-35 degrees)
Product Images
Similar Products
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Dellok Yonghui Radiating Pipe Manufacturing Co.,Ltd.
Location
No.18 Tianyue Road,Yanzhou,Jiangsu China
Contact Person
Peter Cheng