Product Specification

Premium High Frequency Welded (HFW) Finned Tube: ASTM A213 TP347H Base Tube with Stainless Steel (SS) Fins

Detailed Introduction to TP347H & SS High Frequency Welded Finned Tubes

Designed for extreme high-temperature and highly corrosive environments, our High Frequency Welded (HFW) Finned Tubes feature a premium ASTM A213 TP347H stainless steel base tube combined with high-grade Stainless Steel (SS) fins. Unlike standard carbon steel fin tubes, the TP347H material is stabilized with Niobium (Columbium), which prevents intergranular corrosion at elevated temperatures. This specific combination guarantees maximum heat transfer efficiency, exceptional creep strength, and an extended service life in critical industrial heat exchange systems.

Structural Design & Bonding Process of TP347H Base and SS Fins

The superior performance of our finned tubes lies in their robust structural integrity and advanced manufacturing process:

• The Base Tube (ASTM A213 TP347H): A seamless austenitic stainless steel tube designed specifically for superheaters and heat exchangers. It acts as the core pressure vessel, handling high internal temperatures and aggressive fluids.

• The Fin (Stainless Steel - SS304/SS316/SS347): Formed as a continuous helical strip (available in solid plain or serrated types). The stainless steel fin provides an expansive surface area to maximize thermal exchange while resisting external exhaust gas corrosion.

• The Welding/Bonding Process (HFW): Instead of mechanical embedding, we utilize advanced High-Frequency Resistance Welding (HFW). An electrical current heats the SS fin strip and the TP347H tube surface to a plastic state, and they are forge-welded together under pressure. This creates a 100% true metallurgical bond, ensuring zero contact thermal resistance and preventing the fins from loosening even under severe thermal cycling.

Chemical Composition of A213 TP347H Base Tube and SS Fin

To ensure absolute compliance with ASME/ASTM standards, the raw materials are strictly controlled. Below is the standard chemical composition for the TP347H base tube and common SS fin material.

Dimensional Specifications & Tolerances for TP347H + SS HFW Finned Tubes

We offer fully customizable dimensions to match your specific engineering drawings. Our precision manufacturing ensures tight tolerances for seamless installation.

Performance Advantages of TP347H Base and SS Fin Combination

• Extreme Temperature Resistance: The Nb-stabilized TP347H base tube allows for continuous operation in temperatures exceeding 800°C (1472°F) without suffering from carbide precipitation.

• Unmatched Heat Transfer: The metallurgical weld between the TP347H tube and the SS fin eliminates air gaps, ensuring maximum heat conductivity.

• Superior Corrosion Resistance: Both the base tube and fins are made of high-grade austenitic stainless steel, providing exceptional resistance to oxidation and acidic exhaust gases.

• High Mechanical Strength: The HFW process strengthens the tube, allowing it to withstand high-pressure washing, soot blowing, and intense mechanical vibrations.

Industrial Applications for A213 TP347H & SS Welded Fin Tubes

Thanks to the heavy-duty nature of the TP347H and Stainless Steel material pairing, these finned tubes are heavily demanded in critical industrial sectors:

• Petrochemical Refineries: Fired heaters, cracking furnace convection sections, and process coolers.

• Power Generation: Heat Recovery Steam Generators (HRSG), boiler economizers, and superheaters.

• Waste Incineration: Waste Heat Recovery Systems (WHRS) dealing with highly corrosive flue gases.

• Chemical Processing: Condensers and high-temperature gas coolers.

Why Choose Us for Your A213 TP347H & SS Finned Tube Requirements?

With over 15 years of dedicated experience in heat exchange tube manufacturing, we are your reliable global partner.

• Certified Quality: Fully ISO 9001 and ASME certified manufacturing facility.

• Stringent Quality Control: Every single TP347H + SS finned tube undergoes rigorous testing, including Eddy Current Testing (ECT), Hydrostatic Testing, X-Ray weld inspection, and Fin Pull-off tests.

• Custom Engineering: We don't just supply; our engineering team reviews your drawings to suggest the most cost-effective fin density and material configurations.

• Global Export Experience: Secure seaworthy wooden box packaging with internal desiccants to ensure your TP347H finned tubes arrive rust-free and perfectly intact, anywhere in the world.