Fins falling off or corroding quickly? See what a true extruded one-piece bi-metal tube really is

In long-running heat exchange systems, if you're dealing with fin loosening, fast rusting, or difficult maintenance, chances are you're using traditional mechanically wound finned tubes. These tubes use fins wrapped and mechanically bonded onto the tube surface, which often results in poor contact, higher thermal resistance, and fin detachment due to heat or vibration over time — reducing heat transfer efficiency and potentially causing safety concerns.

A true extruded one-piece bi-metal finned tube, however, is manufactured using an integral extrusion process. Aluminum or copper fins are extruded directly from the outer sleeve onto the core carbon steel tube (e.g., ASTM A179, A192, A210 Gr A1/C), forming a metallurgical bond. This seamless, solid structure offers superior corrosion resistance and thermal conductivity, making it ideal for condensers, boilers, and evaporators in high-pressure, high-temperature, and corrosive environments.

Advantages of extruded one-piece bi-metal finned tubes:

• Fins stay intact — stable and long-lasting structure

• Excellent corrosion resistance — suitable for seawater, acidic or ammonia-rich media

• Superior heat transfer performance

• Customizable lengths and material combinations for different working conditions

• Longer service life and lower maintenance costs

Choosing an extruded one-piece bi-metal tube is a reliable way to improve heat transfer efficiency and reduce operational risks.