Large diameter spiral finned tubes are high-performance heat transfer components consisting of a large diameter seamless base tube and continuously spiral-wrapped or welded steel strip fins.
As a heavy-duty category of spiral finned tubes, they are specially designed for industrial heating, boiler systems, waste heat recovery, and large-scale heat exchanger applications where high flow capacity, pressure resistance, and reliable heat transfer performance are required.
Compared with small diameter finned tubes commonly used in air conditioners and small boilers (Φ25–Φ42mm), large diameter spiral finned tubes are typically defined as tubes with a base tube outer diameter of ≥50mm (DN50 and above).
Common industrial sizes include:
(corresponding to approximately DN80–DN200)
A large diameter spiral finned tube mainly consists of two parts:
The base tube is the pressure-bearing component and is typically manufactured from:
Typical specifications:
The tube side can handle various heat transfer media, including:
These characteristics make them especially suitable for heavy industrial environments.
The fins are made from continuous steel strips or stainless steel strips helically wound around the outside surface of the base tube.
The mainstream manufacturing process is:
During production:
Advantages:
The large tube diameter provides:
They are especially suitable for:
Large passages reduce the possibility of clogging and improve equipment reliability.
The thick-wall seamless steel tube design provides:
Typical applications include:
The tubes can operate reliably in environments exceeding 300℃ depending on material selection and design conditions.
Due to their large diameter and high heat transfer capacity:
They are widely used in:
The spiral fin design creates continuous airflow channels.
Benefits:
This makes them suitable for dusty industrial environments.
The large diameter tube structure provides excellent rigidity.
Advantages:
Used in:
Typical building height:
6–15 meters
Heating sources:
They are commonly installed as the core heat transfer element in industrial air heating units and radiators.
Applications include:
The tubes provide efficient heat exchange for hot air circulation systems.
Used in:
Applications:
Suitable for:
Large diameter spiral finned tubes are widely used in:
| Parameter | Specification |
|---|---|
| Base Tube Diameter | Φ89 / Φ108 / Φ133 / Φ159 / Φ168 / Φ219 mm |
| Tube Standard | DN80–DN200 |
| Fin Height | 30 / 40 / 50 mm (customized) |
| Single Tube Length | 6 / 9 / 12 m (custom lengths available up to 25 m) |
| Tube Materials | Carbon steel, stainless steel |
| Fin Materials | Carbon steel strip, stainless steel strip |
| Working Media | Saturated steam, hot water, thermal oil, high-temperature gas |
Large diameter spiral finned tubes combine:
They are an ideal heat transfer solution for demanding industrial applications such as boilers, drying systems, waste heat recovery units, and large-scale heating equipment.
Large diameter spiral finned tubes are designed for heavy-duty industrial heat transfer applications requiring high flow capacity and reliable performance.
With a thick-wall seamless steel tube, high-frequency welded spiral fins, and excellent resistance to thermal stress and vibration, they provide a durable and efficient solution for industrial heating, energy recovery, and heat exchanger systems.
