Wound Fin Tube ASME SA179 KL Type With Aluminium Strip For Heat Exchanger
Wound Fin Tube ASME SA179 KL Type With Aluminium Strip For Heat Exchanger
Product Description
KL-type wound fin tubes are produced by tightly wrapping an aluminum strip around the base carbon steel tube under controlled tension. During the process, the base of the aluminum strip is simultaneously knurled and wound, ensuring a tight mechanical bond between the fin and the tube. This structure provides good heat transfer efficiency and prevents fin loosening during service. KL-type fin tubes are widely used in heat exchangers, air coolers, and condensers where cost-effective and efficient thermal performance is required.
Chemical Composition (ASME SA179 Base Tube)
| Element | C | Mn | P (max) | S (max) |
|---|---|---|---|---|
| Content (%) | ≤ 0.06 | 0.27–0.63 | 0.035 | 0.035 |
Mechanical Properties (ASME SA179 Base Tube)
| Property | Requirement |
|---|---|
| Tensile Strength | ≥ 325 MPa |
| Yield Strength | ≥ 180 MPa |
| Elongation | ≥ 35% |
| Hardness | ≤ 72 HRB |
Chemical Composition (Aluminium 1060 Fin Strip)
| Element | Al | Si | Fe | Cu | Mn | Zn | Others (each) | Others (total) |
|---|---|---|---|---|---|---|---|---|
| Content (%) | ≥ 99.6 | ≤ 0.25 | ≤ 0.35 | ≤ 0.05 | ≤ 0.03 | ≤ 0.05 | ≤ 0.03 | ≤ 0.10 |
Fins Type:
-
KL-Type (Knurled + Wrapped)
-
Aluminum strip wound onto the tube with knurled base for enhanced bonding
-
Available in various fin heights and pitches as per design.
Fin Tube Types
| Feature / Type | L Type | KL Type | G Type | Extruded Type |
|---|---|---|---|---|
| Bonding Method | Wrapped, L-foot | Knurled + Wrapped | Groove + Embedded Fin | Aluminium Sleeve Extruded |
| Fin-Tube Contact | Moderate | Good | Excellent | Excellent |
| Heat Transfer | Moderate | Good | Good–Excellent | Excellent |
| Temperature Resistance | Low–Moderate | Moderate | High | High |
| Mechanical Strength | Fair | Better than L | High | Very High |
| Cost | Low | Low–Medium | Medium | High |
| Typical Use | Basic air coolers | General air coolers | Petrochemical / Refineries | Offshore / Harsh Environments |
Advantages
-
Economical and efficient finning method
-
Improved mechanical bonding between fin and tube compared to L-type
-
Good heat transfer efficiency
-
Suitable for moderate temperature applications
-
Widely applied in heat exchangers for air cooling, power generation, and petrochemical industries
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.