HFW Spiral Steel Fin Tubes For Heat Exchangers Zero Contact Resistance
Product Details
| Wear Protection: | Anti-Abrasion | Welding: | GTAW/SMAW/SAW Per WPS & PQR + Mandatory PWHT |
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| Products: | Boiler Pressure Parts | Material Standards: | GB / ASME / IBR / PED / JIS / KS |
| Application: | Power Station / Industrial / Coking / Biomass Boiler | ||
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HFW steel fin tubes,steel fin tubes Zero Contact Resistance,Spiral fin tubes for heat exchangers |
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Product Description
High-Efficiency High-Frequency Welded (HFW) Spiral Finned Tubes
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Zero Contact Resistance: The continuous welded bond eliminates micro-air gaps between the fin and the tube, ensuring 100% heat conduction efficiency and preventing thermal fatigue during rapid startup/shutdown cycles.
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Extreme Structural Integrity: The welded helical fin acts as continuous structural reinforcement, drastically improving the tube's resistance to high-pressure internal stresses and flue-gas-induced flow vibration.
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Corrosion Protection: The seamless weld prevents corrosive flue gases from penetrating between the fin and the tube, mitigating the risk of localized crevice corrosion and extending the operational lifespan of the economizer module.
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Highly Customizable: The fin pitch (spacing), fin height, and material combinations can be precisely tuned to match the specific flue gas velocity and particulate profile of your combustion system.
| Specification | Technical Details (Utility & Industrial Scale) |
| Equipment Component | Economizers, HRSGs, Waste Heat Boilers |
| Base Tube Outer Diameter | 25 mm to 114 mm |
| Fin Height | 10 mm to 25 mm |
| Fin Pitch (Spacing) | 4 mm to 25 mm (Optimized per ash profile) |
| Fin Material | Carbon Steel, Alloy Steel, Stainless Steel (e.g., TP304/316) |
| Base Tube Material | Seamless Carbon Steel, SA210C, 15CrMoG, Stainless |
| Welding Technology | High-Frequency Resistance Welding (HFW) |
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How do HFW spiral finned tubes compare to H-type finned tubes?HFW spiral finned tubes provide the absolute highest heat transfer surface area per meter, making them incredibly efficient for gas-fired boilers or environments with light, dry ash. However, for high-fouling, heavy-ash environments, H-type finned tubes are often preferred because their straight channels prevent ash bridging.
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Can the fin and the base tube be made from different materials?Yes. A major economic advantage of the HFW process is the ability to use dissimilar metals. For example, you can utilize a high-pressure alloy steel for the base tube to withstand internal steam pressure, while using a standard carbon steel or highly corrosion-resistant ND steel for the fins to manage the external flue gas environment cost-effectively.
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How does the welding process affect the base tube's integrity?The HFW process is highly localized and extremely rapid. It melts only the very surface layer of the base tube (typically less than 0.5 mm deep), ensuring the internal wall thickness and the structural pressure rating of the base tube remain completely uncompromised.
Product Highlights
High-Efficiency High-Frequency Welded (HFW) Spiral Finned Tubes Usage and Application High-Frequency Welded (HFW) spiral finned tubes are the industry standard for maximizing thermal efficiency in compact heat exchange systems. They are universally deployed in Heat Recovery Steam Generators (HRSGs), ...
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