Product Description
Manufactured in our dedicated tube-processing workshops in Jingjiang, our Fin Tube Pipe is a high-performance extended-surface heat exchanger tube engineered for convection sections of petrochemical fired heaters, waste heat recovery boilers, and industrial furnaces. Utilizing 26 years of precision manufacturing experience and certified under ASME "U" and "S" standards, we manufacture each Fin Tube Pipe using automated high-frequency resistance welding (HFW) to create a continuous, metallurgically bonded joint between the fin strip and base tube. This full-penetration weld bond delivers superior heat transfer efficiency, vibration resistance, and structural integrity under high-velocity flue gas streams. By multiplying exterior heat transfer surfaces by up to eight times compared to bare tubes, this high-efficiency Fin Tube Pipe enables compact convection coil designs and maximizes flue gas waste heat recovery, giving boiler manufacturers and refinery EPC contractors an efficient, durable heating element built for severe industrial service.
Applications
Fired Heater Convection Banks: Serving as convection preheating tubes in crude distillation heaters, reformer furnaces, and cracking units.
Heat Recovery Steam Generators (HRSG): Operating as evaporator, economizer, and superheater tubes in combined-cycle and industrial waste heat boilers.
Air Preheaters & Flue Gas Coolers: Recovering waste heat from hot flue gas to preheat boiler feed water, fuel gas, or combustion air.
Petrochemical Convection Retubing: Providing replacement finned tube bundles during refinery turnaround modernizations to restore convection thermal efficiency.
Technical Specifications
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Manufacturing Standards |
ASME Section VIII Div. 1, ASME B31.3, HG/T 3181, API 560, ASTM A213 / A106 / A335 |
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Fin Attachment Method |
High-Frequency Resistance Welding (HFW) producing a continuous weld bond along the entire fin root |
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Fin Geometries |
Solid helical fins or serrated (segmented) helical fins |
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Base Tube Outer Diameter |
25.4 mm (1") to 219.1 mm (8.625") |
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Base Tube Wall Thickness |
2.5 mm to 15.0 mm (Sized to process pressure requirements) |
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Fin Height Range |
9.5 mm to 38.1 mm; Fin Thickness: 0.8 mm to 3.0 mm |
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Fin Pitch (Density) |
40 to 287 fins per meter (1 to 7 fins per inch) |
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Base Tube Materials |
Carbon steel (ASTM A106-B, A192), Cr-Mo alloy steel (A335 P11, P22, P9), and stainless steel (TP304, TP316L, TP321) |
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Fin Strip Materials |
Carbon steel, low-alloy steel, ferritic stainless steel (409, 410, 430), and austenitic stainless steel (TP304, TP316L) |
Customization Capabilities
Tailored Material Combinations: Matching base tube metallurgy and fin strip materials (e.g., stainless fins on Cr-Mo alloy tubes) to balance heat transfer and flue gas dew-point corrosion resistance.
Bare Section Pitch Matching: Providing precision-machined bare sections at both ends and intermediate support locations with exact un-finned lengths to fit convection tube sheets without on-site cutting.
Serrated vs. Solid Fin Selection: Offering serrated fin configurations for enhanced flue gas turbulence and higher heat transfer coefficients, or solid fins for environments requiring frequent soot blowing.
Custom Tube Lengths: Continuous finning capability on single tube lengths up to 24 meters, minimizing intermediate butt welds.
Zero MOQ Flexibility: Supporting small-batch custom replacement orders for emergency repair bundles as well as volume deliveries for complete convection banks.
Quality Control
Certified Quality Standards: Certified under ASME "U" and "S" stamps, ISO 9001:2015, and ISO 3834-2 International Welding Quality System.
Full Process QR Code Traceability: Every finned tube bundle carries a serialized QR code linked to certified base tube mill test reports, fin strip chemistry, and weld inspection records.
Weld Bond Integrity Testing: Performing fin pull-off tests, macro-etch weld penetration examinations, and metallographic root-fusion analysis on production test coupons.
100% Non-Destructive Testing: Base tubes undergo 100% hydrostatic testing and eddy current testing prior to finning, followed by 100% visual and dimensional verification of fin pitch and height.
Export-Grade Protective Packaging: Stored on custom steel-framed shipping crates with protective wooden spacers between tube tiers, end caps on tube bevels, and weatherproof wrapping for ocean transit.
FAQ
Q: What is the advantage of high-frequency resistance welded (HFW) fins over mechanical crimped or embedded fins?
A: HFW finning creates a complete metallurgical fusion bond between the fin root and the base tube wall. This bond eliminates contact thermal resistance, prevents fin loosening under thermal cycling, and resists mechanical damage caused by soot blower operation.
Q: What is the typical production lead time for a custom finned tube order?
A: Standard finned tube orders typically require 3 to 4 months from raw material receipt to final inspection, depending on total tonnage and base tube metallurgy.
Q: What warranty coverage do you provide for international deliveries?
A: We provide an 18-month warranty from site arrival or 12 months from commercial operation (whichever comes first), backed by responsive technical engineering support.
Q: What payment terms and currencies do you accept for export contracts?
A: We support EXW and FOB shipping terms. Our standard commercial milestones are 30% advance deposit, 40% manufacturing milestone payment, and 30% balance prior to factory dispatch, payable in USD, EUR, or RMB.
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