EN 10217-7 1.4301 Extruded Fin Tubes For Air Coolers Heat Recovery

Extruded Fin Tube: EN 10217-7 1.4301 Base Tube + AL Fins

Base Tube & Fin Synergy

Our extruded fin tubes feature a robust EN 10217-7 1.4301 (AISI 304) stainless steel base tube integrally bonded to 99.5% pure aluminum fins via cold extrusion. This design maximizes thermal conductivity (AL fins: 237 W/m·K) while leveraging the base tube’s corrosion resistance for harsh environments (e.g., acidic/chloride exposure).

Manufacturing Excellence

1. Base Tube Fabrication:
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• Cold-drawn seamless tubing per EN 10217-7, annealed for stress relief.

• Surface cleaned via pickling/passivation.

1. Fin Extrusion:
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• Aluminum fins extruded at 350–400°C under 1,500–2,000 psi pressure.

• Metallurgical bond formed without filler material (bond strength >35 MPa).

1. Quality Validation:
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• Helium leak testing (sensitivity: 1×10⁻⁹ mbar·L/s).

• 100% eddy current inspection for fin adhesion integrity.

Chemical Composition

Guaranteed Material Purity for Performance Longevity

Dimensional Tolerances

Precision Metrics for Seamless Integration

Critical Application Fields

1. Chemical Processing:
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• Sulfuric acid coolers, condenser bundles (resists pitting corrosion, Cr/Ni content).

1. Power Generation:
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• Air-cooled condensers (ACCs) for turbines (AL fins prevent frost accumulation).

1. HVAC&R:
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• Low-temperature evaporators (AL fins enhance defrost efficiency).

1. Marine Engineering:
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• Seawater desalination units (1.4301 resists chloride-induced stress corrosion).

Advantages & 15+ Years Expertise

Thermal Efficiency: 5–8x higher heat flux vs. bare tubes (fin surface area ratio: 15–25:1).

Corrosion Resistance: Base tube passes ASTM A262 Practice E (intergranular corrosion test).

Mechanical Durability: Fin pull-off strength >50 N/mm (per ASTM E8).

Customization: 50+ SKUs (OD: 15–50 mm; fin height: 3–20 mm; lengths ≤20 m).

Why Partner With Us?

• ISO 9001-certified manufacturing with EN 10217-7 compliance.

• 200+ projects delivered globally (EU, MENA, ASEAN).

• Lifetime technical support & material certification (MTC 3.1 per EN 10204).