Continuous Welded Finned Coils

Continuous welded finned coils for high temperatures and pressures

What Is a Continuous Welded Finned Coil?

A continuous welded finned coil is a heat transfer component made from finned tubes in which steel fin strip is helically wound around the tube and continuously welded at the same time. The metallurgical bond between fin and tube minimises contact resistance and supports efficient heat transfer from fluid to fins.

Manufacturing Method

During production, steel strip is wound around a rotating tube at the specified fin pitch, while high-frequency resistance welding continuously joins the contact line. This produces much greater mechanical strength than tension-wound fins. The tubes are then bent and welded to headers according to the project to create the coil assembly.

Advantages

High-Temperature Resistance: The welded connection prevents fins from loosening even at high flue gas temperatures.
Low Contact Resistance: The metallurgical bond maintains heat transfer efficiency over many years.
Vibration and Thermal Shock Resistance: Reliable operation in systems with frequent start-stop cycles.
Long Service Life: Reduced maintenance requirements because the fins do not separate from the tube.

Applications

Steam and high-temperature water boilers
Economizers and waste heat recovery systems
Air preheaters and process heaters
Drying facilities and industrial furnace applications

Material and Design Options

Continuous welded finned coils can be manufactured using carbon steel, alloy steel and stainless steel tube-fin combinations. Fin height, fin pitch, number of rows and tube diameter are determined through engineering calculations based on fluid type, temperature, pressure and allowable pressure drop. Hot-dip galvanizing can be applied where required.

For custom continuous welded 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 continuously welded and wound fins?

Wound fins are attached to tubes through mechanical tension, whereas continuously welded fins are welded to the tube. Welded fins therefore provide greater resistance to high temperature, vibration and thermal shock.

02. When should continuous welded finned coils be selected?

They are preferred in applications where fins may loosen, including flue-gas economizers, waste heat boilers and high-temperature process heaters.

03. Can continuous welded finned coils be galvanized?

Yes. Carbon steel coils can be hot-dip galvanized after manufacturing to provide corrosion protection.

THE RIGHT HEAT TRANSFER
FOR YOUR PROJECT.