Case Study: Laser Welded Stainless Steel Finned Tubes for Russia

Contents hide

2 Our Solution: Why We Recommended Laser Welding

5 Looking for Reliable Finned Tube Solutions?

Client Inquiry

A Russian industrial client reached out to us with specific, rigid technical parameters for an upcoming thermal engineering project. The initial inquiry specified the following structural dimensions:

Base Tube Diameter: 25 mm
Wall Thickness: 2 mm
Fin Height: 15 mm
Fin Pitch: 3 mm
Length: 1 meter
Material: AISI 304 / AISI 304L (for superior corrosion resistance in harsh environments)

The client was open to either welded or press-fitted (tension-wound) fins. However, given Russia’s extreme seasonal temperature fluctuations and the high thermal efficiency required for their system, a standard joint wouldn’t provide the long-term reliability they needed.

Our Solution: Why We Recommended Laser Welding

After evaluating different manufacturing processes, they required a solution that offered superior thermal conductivity and structural integrity. After a thorough review by the Cangzhou Datang engineering team, we recommended Laser-Welded Finned Tubes over press-fitted or standard welding options.

Here is why our technical recommendation stood out to the client:

100% Fully Fused Joint: Unlike press-fitted fins, which can develop air gaps over time due to thermal expansion and contraction (leading to a massive drop in heat transfer), laser welding achieves a 100% metallurgical bond between the fin and the base tube.
Minimal Heat Affected Zone (HAZ): Laser welding utilizes a highly concentrated energy beam. This ensures a deep weld penetration without overheating or distorting the 2mm thin-walled AISI 304 base tube, fully preserving the anti-corrosion properties of the stainless steel.
Maximum Heat Transfer Efficiency: The seamless contact between the 15mm fin and the 25mm tube ensures zero thermal resistance, maximizing the heat dissipation area within a compact 1-meter footprint.

Technical Specifications Table

Parameter	Specification
Base Tube OD	25 mm
Wall Thickness	2 mm
Fin Height / Thickness	15 mm / Custom
Fin Pitch	3 mm
Finning Technology	Precise Continuous Laser Welding
Material Grade	Stainless Steel AISI 304 / AISI 304L
Length per Piece	1000 mm
Total Quantity	36 Pcs

Quality Control & Delivery

To ensure full compliance with international standards, all 36 pieces underwent strict quality assurance tracking at our facility.From raw material inspection (verifying AISI 304L certificates) to precise laser welding and final dimensional checks, every tube met the client’s exact specifications. The products were carefully packaged to ensure safe transit to Russia.

Dimension Inspection: Strict tolerance checks on the 3mm fin pitch and 15mm height.
Weld Integrity Test: Visual and micro-structural weld checks to ensure zero defects.
Export Packaging: Securely packed in seaworthy, reinforced wooden cases to prevent any bending or fin damage during transit to Russia.

Result: The Russian client was highly impressed by our proactive technical advice and engineering expertise. By upgrading to laser welding, they secured a longer lifespan and higher efficiency for their heat exchanger system.

Looking for Reliable Finned Tube Solutions?

Whether you need high-frequency welding, extrusion, or premium laser-welded finned tubes, Cangzhou Datang Steel Pipe Co., Ltd delivers precision-engineered components tailored to your exact drawings.