ASTM A179 extruded finned tubes are widely used in air-cooled heat exchangers and industrial cooling equipment requiring high thermal efficiency and long-term reliability. Manufactured from ASTM A179 seamless low-carbon steel tubes as the base tube, these finned tubes feature an integrally formed aluminum outer fin layer created through a cold extrusion process.
Unlike mechanically wound fins, extruded fins completely encapsulate the base tube with a continuous aluminum sleeve, providing excellent environmental protection while maximizing heat transfer performance. The robust fin structure ensures resistance against vibration, mechanical damage, and thermal cycling, making them particularly suitable for demanding operating conditions.
Our extruded finned tubes are engineered and manufactured according to customer specifications and international standards to deliver consistent performance in petrochemical plants, power generation facilities, compressor aftercoolers, and process air cooling systems.
The high-density aluminum fins significantly increase the external heat transfer area, improving overall thermal performance and reducing equipment footprint.
The aluminum fin root forms a protective sleeve around the ASTM A179 tube, shielding it from atmospheric corrosion and extending service life.
The integral fin construction offers outstanding resistance to vibration, handling damage, and thermal fatigue.
The extruded fin design minimizes fin loosening and maintains stable performance under cyclic temperature fluctuations.
Enhanced thermal efficiency contributes to lower fan power consumption and improved energy utilization.
Various fin geometries and tube dimensions can be customized to satisfy different process requirements.
Extruded finned tubes are produced through a cold-forming process:
This manufacturing method produces fins with exceptional mechanical integrity and thermal contact.
Extruded finned tubes are extensively used in:
The following dimensions represent commonly supplied configurations.
| Item | Typical Range |
|---|---|
| Base Tube Material | ASTM A179 Seamless Tube |
| Fin Material | Aluminum 1050 / 1060 |
| Base Tube Outside Diameter | 15.88 mm to 50.80 mm |
| Base Tube Wall Thickness | 1.65 mm to 5.00 mm |
| Tube Length | Up to 18,000 mm |
| Fin Outside Diameter | 25 mm to 82 mm |
| Fin Pitch | 2.0 mm to 11.0 mm |
| Fin Height | 5 mm to 16 mm |
| Fin Thickness | 0.30 mm to 0.50 mm |
| Bare End Length | According to customer requirements |
| Maximum Operating Temperature | Approximately 300°C |
Custom dimensions are available upon request.
The ASTM A179 base tube complies with the chemical requirements specified in ASTM A179/A179M.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.06 – 0.18 |
| Manganese (Mn) | 0.27 – 0.63 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
The low-carbon composition contributes to excellent ductility, formability, and thermal conductivity.
| Property | Requirement |
|---|---|
| Tensile Strength | Minimum 325 MPa |
| Yield Strength | Not Specified |
| Elongation | Minimum 35% |
| Hardness | Typically ≤ 72 HRB |
| Flattening Test | Required |
| Flaring Test | Required |
These mechanical characteristics ensure reliable fabrication and operation under normal heat exchanger service conditions.
Performed in accordance with ASTM A179 requirements to verify pressure integrity.
Non-destructive testing for detecting surface and subsurface defects.
Verifies finning integrity and confirms the absence of leakage.
Ensures adequate ductility of the ASTM A179 base tube.
Confirms the tube's resistance to cracking during deformation.
Comprehensive examination of fin formation quality and surface finish.
Checks fin tightness and extrusion quality throughout the tube length.
Compared with other finning technologies, ASTM A179 extruded finned tubes provide:
With extensive manufacturing experience in heat transfer components, we combine advanced extrusion technology, strict quality assurance, and flexible production capabilities to deliver finned tubes that meet the demanding requirements of global air cooler manufacturers, EPC contractors, and heat exchanger fabricators.
Whether for replacement projects or new installations, our ASTM A179 extruded finned tubes provide dependable performance, consistent quality, and optimized heat transfer efficiency for critical cooling applications.
