Continuous Welded Serrated Finned Coils

Continuous welded serrated finned coils for maximum heat transfer

What Is a Continuous Welded Serrated Finned Coil?

A continuous welded serrated finned coil is made from finned tubes in which the outer edge of the fin strip is cut into segments and the fin is continuously welded to the tube. This combines the heat transfer performance of serrated fins with the mechanical strength of a welded connection.

Why Are Serrated Fins More Efficient?

The segmented fin structure causes the gas flow boundary layer to redevelop at each segment and increases turbulence. This produces a higher heat transfer coefficient than solid fins for the same surface area, allowing more compact and lighter heat transfer surfaces.

Advantages

High Heat Transfer Coefficient: Turbulence improves gas-side efficiency.
Compact Design: The same capacity can be achieved with fewer tubes and less space.
Welded Strength: Fins remain secure under high temperature and vibration.
Weight Advantage: Segmented fins save material compared with equivalent solid-fin solutions.

Applications

Heat recovery steam generators, or HRSGs, and cogeneration systems
Boiler economizers and flue gas heat recovery
Process heaters and air preheaters
Petrochemical and power plant applications

Design Considerations

Serrated fins offer high efficiency, but solid fins may be more suitable for gases with very high soot and dust loads. The Heatmek engineering team assesses gas composition, fouling risk, temperature and pressure drop limits together to select the fin type, segment width and fin pitch.

For custom continuous welded serrated finned coil solutions, contact the Heatmek engineering team.

Our Project Process

01. Requirements Analysis and Technical Assessment

We analyse your process conditions, fluid type and capacity requirements to determine the most suitable solution.

02. Engineering Design and Calculations

We size the product for your project through thermal and mechanical calculations and prepare its technical drawings.

03. Production Planning and Material Selection

We plan production and select materials suited to temperature, pressure and corrosion conditions.

04. Manufacturing and Assembly

We carry out fin winding, welding, bending and assembly at our facility in accordance with quality standards.

05. Testing, Inspection and Approval

We verify every product through pressure and leak tests before shipment.

06. Delivery and After-Sales Support

Following on-time delivery, we support you through commissioning and maintenance.

Product Photos

Frequently Asked Questions

01. What is the difference between serrated and solid fins?

Serrated fins have segmented edges that increase turbulence and the heat transfer coefficient. Solid fins have a continuous edge and may offer easier cleaning with heavily contaminated gases.

02. Where are continuous welded serrated finned coils most commonly used?

They are widely used in waste heat boilers, economizers and systems recovering heat from high-temperature flue gases.

03. How are fin dimensions determined?

Fin height, pitch and segment width are determined for each project through thermal calculations based on capacity, gas temperature, allowable pressure drop and fouling conditions.

THE RIGHT HEAT TRANSFER
FOR YOUR PROJECT.