Embedded Fin Tubes for Air Cooler Condensers (GOST 550-2020 + AL1060)
Product Overview
Embedded Fin Tubes for Air Cooler Condensers are high-performance heat transfer components designed for air-cooled condenser systems (ACC) and large-scale industrial cooling applications. Manufactured with a GOST 550-2020 carbon steel base tube combined with AL1060 aluminum embedded fins, these tubes provide excellent thermal conductivity, mechanical strength, and long-term corrosion resistance.
The embedded fin structure is produced by machining helical grooves into the outer surface of the steel tube and firmly embedding aluminum fins into the grooves. This mechanical bonding method creates a durable fin-to-tube connection, ensuring efficient heat transfer even under high vibration, thermal cycling, and outdoor operating conditions.
These fin tubes are widely applied in power plants, petrochemical facilities, refinery units, natural gas processing plants, and industrial steam condensation systems, where reliable heat rejection performance and long service life are essential.
Product Features & Advantages
1. High Thermal Efficiency
The AL1060 aluminum fins provide excellent thermal conductivity, significantly increasing the external heat transfer area compared with bare tubes. The enlarged surface area improves air-side heat transfer efficiency, allowing compact condenser designs.
2. Strong Mechanical Bond Between Fin and Tube
The embedded fin manufacturing process creates a tight mechanical connection between the aluminum fin and steel tube. This prevents fin loosening during temperature fluctuations, vibration, and long-term operation.
3. Excellent Outdoor Corrosion Resistance
Aluminum fins naturally form a protective oxide layer, providing resistance against atmospheric corrosion. The GOST 550-2020 steel tube offers reliable pressure-bearing capability for condenser service.
4. Suitable for Harsh Industrial Environments
Embedded fin tubes are especially suitable for air-cooled condensers exposed to:
- High ambient temperatures
- Dust and industrial atmosphere
- Continuous vibration
- Large temperature variations
Manufacturing Process
-
Base Tube Preparation
- GOST 550-2020 carbon steel tubes are inspected and surface cleaned.
- Tube dimensions and surface quality are verified before finning.
-
Groove Machining
- Helical grooves are precisely machined onto the tube outer surface.
- Groove depth and pitch are controlled to ensure proper aluminum fin embedding.
-
Aluminum Fin Embedding
- AL1060 aluminum strips are wound into the grooves under controlled tension.
- The tube material is mechanically expanded around the fin root to achieve secure bonding.
-
Finishing Treatment
- Dimensional inspection
- Surface quality examination
- Hydraulic pressure testing
- Final quality verification
Common Specifications
| Item |
Specification Range |
| Base Tube Material |
GOST 550-2020 Carbon Steel |
| Fin Material |
AL1060 Aluminum |
| Tube Type |
Seamless Steel Tube |
| Manufacturing Type |
Embedded / Grooved L-foot Mechanical Bonded Fin Tube |
| Tube Outside Diameter |
25.4 mm – 76.2 mm |
| Tube Wall Thickness |
2.0 mm – 8.0 mm |
| Tube Length |
3,000 mm – 18,000 mm |
| Fin Height |
8 mm – 20 mm |
| Fin Thickness |
0.2 mm – 0.5 mm |
| Fin Pitch |
2.0 mm – 5.0 mm |
| Maximum Operating Temperature |
Up to approximately 300°C (depending on design conditions) |
Customized dimensions are available according to customer drawings and condenser design requirements.
Typical Applications
Embedded fin tubes manufactured with GOST 550-2020 + AL1060 materials are commonly used in:
- Air-cooled condensers (ACC)
- Steam turbine condenser systems
- Power generation plants
- Petrochemical process cooling units
- Refinery heat recovery systems
- Natural gas processing facilities
- Industrial cooling systems
- Large-scale heat exchanger equipment
Inspection & Testing Methods
To ensure reliability and compliance with industrial heat exchanger requirements, embedded fin tubes undergo comprehensive inspection procedures.
1. Raw Material Inspection
- Verification of material certificates (MTC)
- Chemical composition analysis
- Mechanical property testing
- Dimensional inspection
2. Base Tube Testing
- Ultrasonic testing (UT)
- Eddy current testing (ECT)
- Hydraulic pressure testing
- Visual surface inspection
3. Fin Bond Quality Inspection
- Fin-to-tube bonding examination
- Fin height and pitch measurement
- Pull-off strength verification
- Surface defect inspection
4. Final Inspection
- Outside diameter measurement
- Wall thickness inspection
- Tube straightness inspection
- Length verification
- Packaging inspection
Chemical Composition
GOST 550-2020 Carbon Steel Base Tube (Typical)
| Element |
Typical Content (%) |
| Carbon (C) |
≤ 0.25 |
| Silicon (Si) |
0.17 – 0.37 |
| Manganese (Mn) |
0.35 – 0.80 |
| Phosphorus (P) |
≤ 0.035 |
| Sulfur (S) |
≤ 0.035 |
| Iron (Fe) |
Balance |
Chemical composition may vary according to the specific GOST steel grade specified by the customer.
AL1060 Aluminum Fin Material
| Element |
Typical Content (%) |
| Aluminum (Al) |
≥ 99.60 |
| Silicon (Si) |
≤ 0.25 |
| Iron (Fe) |
≤ 0.35 |
| Copper (Cu) |
≤ 0.05 |
| Manganese (Mn) |
≤ 0.03 |
| Magnesium (Mg) |
≤ 0.03 |
| Zinc (Zn) |
≤ 0.05 |
Mechanical Properties
GOST 550-2020 Steel Tube (Typical)
| Property |
Requirement |
| Tensile Strength |
370 – 500 MPa |
| Yield Strength |
≥ 215 MPa |
| Elongation |
≥ 20% |
| Hardness |
According to applicable grade requirements |
AL1060 Aluminum Fin Material
| Property |
Typical Value |
| Tensile Strength |
70 – 130 MPa |
| Yield Strength |
20 – 80 MPa |
| Elongation |
≥ 20% |
| Density |
2.70 g/cm³ |
| Thermal Conductivity |
Approx. 230 W/m·K |
Why Choose Our Embedded Fin Tubes?
- Manufactured according to international heat exchanger industry requirements
- Reliable GOST 550-2020 steel tube performance
- High conductivity AL1060 aluminum fins
- Strong mechanical fin-to-tube bonding
- Suitable for high-capacity air-cooled condenser applications
- Strict inspection throughout manufacturing
- Custom sizes available for EPC contractors and OEM heat exchanger manufacturers
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