Expansion Joints

Specification of High Frequency Welded (HFW) Finned Tube
Tube/Pipe Material	Carbon Steel, Stainless Steel, Copper, Inconel, Titanium
Fin Material	Carbon Steel, Stainless Steel, Copper, Aluminum
Tube/Pipe OD	8.0mm ~ 219.1mm
Fin Type	Solid and Serrated
Fin Height	5.0mm – 20mm( 50% of tube OD, up to 80% in special request)
Fin Thickness	0.4mm ~ 3.0mm
Fin per Meter (FPM)	Max. 520 fin (based 0.4t fin)
Tube Length	Max. 27,000 mm
Application	– Oil & Gas: ACHE(Air cooled), HVAC, Economizer, Heat exchanger, Air Preheater, Fired Heater – Power plant: HRSG, Nuclear, GGH(Desulfurization)

Advantage of High Frequency Welded(HFW) Finned Tube vs Embedded Fin (G type) & Extrude Type
Weldability	High Frequency Welded (HFW) can be applied dissimilar tube and fin welds instead of G-Type and Extrude Type
Efficiency	Higher heat exchange efficiency, 10% higher than G-Type, 15% higher than Extruded
Cost Save for Material	Tube material cost saving, 10% for G-type (0.3mm Groove), Much less for Extruded Type
Flexible Fin Pitch	Smaller and lighter equipment
Tube Size and Quantity	Minimum 10% reduce tube size and quantity
Higher Temperature	Applied to higher temperature depend on design temperature
Strong Durability & Maintenance	Strong durability with welded fin, Easy handling and waterjet washed.

Macro-Picture of Fin Connection Details
High Frequency Welded (HFW) Fin	Embedded Fin (G type)

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