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| Brand Name: | YUHONG |
| MOQ: | 200-500KGS |
| Price: | Negotiable |
| Payment Terms: | L/C,T/T,AT SIGHT |
| Supply Ability: | According to Clients' requirements |
| Base Tube Standard | ASTM A179 |
| Type | Wound, L Type, LL Type, KL Type |
| Bare Tube Diameter | 16mm-63mm |
| Fin Pitch | 2.1mm-5mm |
| Fin Height | <17mm |
| Fin Thickness | ~0.4mm |
| Application | Petrochemical, Power Generation, HVAC Industries |
ASTM A179 L-Type Wound Finned Tube is a cost-effective heat transfer solution designed for moderate-temperature applications. It features a seamless low-carbon steel base tube (ASTM A179) with L-shaped aluminum fins mechanically wound under tension. This robust construction creates maximum fin-to-tube contact area, delivering 25% higher heat transfer efficiency than bare tubes in boilers, economizers, and heat recovery units. Ideal for non-corrosive environments up to 150°C (302°F), it balances performance and budget with minimal maintenance.
| Element | Content (%) | Role |
|---|---|---|
| Carbon (C) | ≤ 0.06 | Weldability |
| Manganese (Mn) | 0.27-0.63 | Strength |
| Phosphorus (P) | ≤ 0.035 | Purity |
| Sulfur (S) | ≤ 0.035 | Ductility |
| Silicon (Si) | ≥ 0.10 | Deoxidation |
| Thermal Conductivity | 51.9 W/m*K (Base) | 204 W/m*K (Fin) |
| Property | Base Tube (A179) | Aluminum Fin (1100) |
|---|---|---|
| Tensile Strength | ≥ 325 MPa | 95-125 MPa |
| Yield Strength | ≥ 180 MPa | 35-50 MPa |
| Max Service Temp. | 260°C (500°F) | 150°C (302°F) |
| Fin Bond Strength | - | > 35 MPa (Tested per ASTM E8) |
| Recommended Medium | Steam/Hot Water | Air/Gases |
