Superior Engineering & Manufacturing Excellence

Why Choose Stainless Steel Spiral Finned Tubes?

Unlike standard smooth tubes, the spiral fin configuration significantly increases the external surface area. By utilizing stainless steel, Datang Finned Tube ensures that your heat exchange systems can handle high temperatures and aggressive chemical exposures without premature failure.

Key Manufacturing Methods

The performance of a spiral finned tube is largely determined by how the fin is attached to the base tube:

• High-Frequency Welded (HFW): The fin is spirally wound and welded to the tube using high-frequency electrical resistance. This creates a strong mechanical bond with excellent thermal conductivity, ideal for high-stress industrial boilers.

• Laser Welded: A precision laser creates a full penetration weld between the fin and the tube. This method results in a very small heat-affected zone and a 100% metallic bond, offering the highest heat transfer efficiency and resistance to thermal cycling.

• Embedded (G-Type): The fin is tension-wound into a machined groove on the tube surface and then backfilled. This is suitable for high-temperature applications where mechanical bonding is preferred over welding.

• Tension Wound (L/LL/KL-Type): The fin is wrapped under tension around the tube. While cost-effective, these are generally used for lower-temperature applications compared to welded varieties.

Key Technical Specifications

Our production process at Datang Finned Tube adheres to strict international standards (ASTM, ASME, EN), ensuring every tube meets your precise engineering requirements.

Core Features and Heat Transfer Principles

1.Structural Design:

Composed of a stainless steel base tube and spiral fins. The fins are tightly wound around the outer surface of the base tube—typically utilizing high-frequency welding or laser welding processes—to form a continuous spiral heat-dissipation surface.

2.Heat Transfer Mechanism:

Increased Surface Area: The fin structure expands the heat transfer surface area to 5–8 times that of a bare tube, thereby significantly enhancing thermal conduction efficiency.
Enhanced Thermal Convection: The spiral geometry induces fluid turbulence, disrupting the boundary layer and boosting the convective heat transfer coefficient by 30%–50%.
Multi-Mode Transfer: By combining thermal conduction, convection, and a minor degree of thermal radiation, the system facilitates the rapid transfer of heat from the internal medium to the external environment.

3.Material Advantages:

Corrosion Resistance: Composed of 304 or 316L stainless steel (containing chromium and nickel), the material forms a protective oxide film on its surface, offering excellent resistance to acid and alkali corrosion and making it suitable for use in humid or corrosive environments.
High Strength: The base tube typically features a wall thickness of 1–5 mm, providing robust pressure-bearing capacity capable of accommodating operating pressures ranging from 1.0 to 1.6 MPa.

Performance Advantages of Datang Finned Tubes

1. Superior Corrosion Resistance

By using premium-grade stainless steel, our spiral finned tubes are immune to oxidation and scaling at high temperatures. This makes them ideal for marine, chemical, and oil & gas applications where carbon steel would rapidly degrade.

2. Enhanced Thermal Efficiency

The spiral geometry creates turbulence in the fluid flow, breaking the boundary layer and drastically increasing the heat transfer coefficient. Datang Finned Tube optimizes the fin-to-pipe bond to ensure a negligible thermal resistance at the interface.

3. High Structural Rigidity

Our advanced welding technology ensures a continuous, high-strength bond between the fin and the base tube. This allows our products to withstand high-pressure cleaning and mechanical vibrations within the heat exchanger shell.

Typical Application Scenarios

1.Industrial Waste Heat Recovery:

Boiler Economizers: Used in the power generation and metallurgy sectors to recover waste heat from high-temperature flue gases, achieving heat exchange efficiencies of over 65%.
Chemical Heat Exchange: Used in processes such as ammonia synthesis and distillation to precisely control reaction temperatures; their corrosion-resistant properties ensure stable, long-term operation.

2.HVAC and Heating Systems:

Air-Source Water Heating: Compatible with hydronic piping systems; constructed from sanitary and safe 304-grade stainless steel, which resists rust and meets the requirements for potable water conveyance.
Industrial Heating: Used in radiators for workshops and factory floors; compatible with both steam and hot water heating media, offering high heat dissipation output with minimal temperature fluctuation.

3.Agriculture and Animal Husbandry:

Livestock Shed Heating: Provides a comfortable growth environment for poultry and livestock through precise heating control, thereby reducing the risk of cold-induced diseases.
Greenhouses: Regulates temperature and humidity levels to prevent crop damage caused by low temperatures; the corrosion-resistant surface treatment protects against the corrosive effects of high-humidity environments.

The Datang Quality Assurance

At Datang Finned Tube, quality isn’t just a buzzword—it’s our foundation. Every Stainless Steel Spiral Finned Tube undergoes rigorous testing before dispatch, including:

• Hydrostatic Testing to ensure pressure containment.

• Fin-to-Tube Bond Pull Test to verify mechanical strength.

• Visual & Dimensional Inspection for perfect alignment and pitch.

Expert Insight: When selecting a finned tube, the choice between Solid and Serrated fins depends on your fouling environment. Our engineers at Datang Finned Tube can help you determine the optimal configuration for your specific project.