What is G Type Fin Tube

G-Type Fin Tubes are a type of finned tube where fins are mechanically bonded to the base tube through processes such as fin winding and embedding. These tubes typically feature fins with high surface area, and the fins are shaped like the letter "G". This design increases contact area with fluids and enhances heat exchange efficiency.

Also known as grooved fin tubes or embedded fin tubes, the "G" designation refers to the grooved design. They are manufactured by twisting fin strips (typically made of copper or aluminum) into machined grooves on the tube's outer surface. The fin strips are then backfilled to securely lock them in place, ensuring a tight fit.

Key Advantages:

• Delivers excellent thermal performance
• Operational temperature up to 350–400°C (fin temperature withstands 260°C)
• Maximum service temperature suitable for air coolers

Limitations:

• Prone to galvanic corrosion between dissimilar metals (fins and tube) in atmospheric environments
• Poor corrosion resistance and higher cost
• Stress concentration at tube walls; not recommended for medium/high-pressure applications
• Inferior heat transfer performance compared to other fin tubes if pressure is inadequately applied (edges of spiral grooves not tightly contacting the aluminum sheet)

Compared to traditional fin tubes, G-Type Fin Tubes offer superior heat dissipation and higher thermal efficiency, making them ideal for equipment requiring large-area heat dissipation, such as: air coolers, condensers, cooling towers.

G-Type Fin Tubes provide a reliable and efficient solution for high-temperature heat transfer applications. Their grooved design and secure locking mechanism deliver strength and durability, enabling efficient thermal exchange while enhancing overall system performance.