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TP321H High Frequency Welded Finned Tubes for Boilers & Air Heaters

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TP321H High Frequency Welded Finned Tubes for Boilers & Air Heaters

Name: TP321H High Frequency Welded Finned Tubes for Boilers amp Air Heaters
Brand: YUHONG
Price: 1 USD

Quality TP321H High Frequency Welded Finned Tubes for Boilers & Air Heaters for sale

Brand Name : YUHONG

Model Number : HFW FINNED TUBE

Certification : ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008

Place of Origin : CHINA

MOQ : 10PCS

Price : Negotiable

Payment Terms : L/C,T/T

Supply Ability : 1000 tons per month

Delivery Time : Depends on quantity

Packaging Details : IRON FRAME WOODEN CASE

Base Tube Material : TP321H

Fin Material : Carbon Steel (CS)

Welding Process : High Frequency Welding (HFW)

Tube Outer Diameter (OD) : 16-219MM

Application : Heat Exchangers, Boilers, Air Heaters, Economizers

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High Frequency Welded Finned Tubes: Base Tube TP321H + Fins Carbon Steel (CS)

1. Product Introduction

High Frequency Welded (HFW) Finned Tubes are engineered for maximum thermal efficiency in aggressive environments. Our tubes feature a corrosion-resistant TP321H

austenitic stainless steel base tube mechanically bonded via high-frequency welding to carbon steel (CS) fins. This design amplifies surface area by 8–12×, delivering

unmatched heat exchange performance in high-temperature/pressure applications.

2. Finned Tube Structure & Manufacturing Process

A. Base Tube (TP321H Stainless Steel):

High-temperature stabilized austenitic stainless steel (Ti-stabilized).

Seamless or welded construction, ideal for thermal cycling.

B. Fins (Carbon Steel - CS):

Low-carbon steel fins (e.g., ASTM A569) for cost-effective durability.

Helical design: 150–400 fins/meter, customizable for turbulence optimization.

C. High-Frequency Welding Process:

Embedment Depth: 0.3–0.5 mm into the base tube.

Bond Strength: >70 MPa (no filler material).

Process: Electric current fuses fins to the base tube, ensuring metallurgical integrity and eliminating air gaps.

3. Dimensional Tolerances

Precision-Machined for Seamless Integration

Parameter	Tolerance Range
Base Tube OD	±0.10 mm (e.g., 25.4–273 mm)
Base Tube Thickness	±10% (e.g., 2.0–12.7 mm)
Fin Height	±0.25 mm (e.g., 12–25 mm)
Fin Thickness	±0.05 mm (e.g., 0.8–2.0 mm)
Fin Pitch	±0.3 mm (e.g., 3–10 mm)
Straightness	≤1.5 mm/m length

4. Performance Advantages

20–35% Higher Heat Flux vs. bare tubes due to finned surface.

900°C Operating Temp: TP321H base resists scaling/oxidation.

Corrosion Resistance: Ti-stabilization prevents intergranular corrosion in acidic/chloride environments (pH 2–12).

Reduced Fouling: Helical fins disrupt boundary layers.

Lifespan: 15+ years in boilers, exhaust systems.

5. Application Areas

Power Generation: HRSG (Heat Recovery Steam Generators), boilers.

Petrochemical: Crackers, reformers, sulfur recovery units (SRUs).

Waste Heat Recovery: Exhaust stacks (400–800°C gases).

HVAC: Industrial air heaters/dehumidifiers.

Renewables: Biomass combustion, geothermal systems.

6. Our Expertise & Competitive Edge

15+ Years Specialization: 5,000+ tubes supplied globally (EU/APAC/MENA).

Customization: Tailored lengths (1–24m), fin density, and coatings (Aluminized/Etched).

Quality Assurance:

Eddy current testing (ASTM E309) on base tubes.
Shear strength tests (70+ MPa) on fin bonds.
100% dimensional inspection per ASME Sec. V.

TP321H High Frequency Welded Finned Tubes for Boilers & Air Heaters

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