ASME SB163 N08825 Extruded Finned Tube With Al1060 Fins for Sour Gas Air Coolers

Product Specification

ASME SB163 N08825 Extruded Finned Tube With Al1060 Fins for Sour Gas Air Coolers

Premium ASME SB163 N08825 extruded finned tubes with integral aluminum extrusion fins. Outstanding anti-corrosion performance for oil & gas, chemical, marine heat exchange projects. Custom dimensions & third-party inspection available.

Our ASME SB163 UNS N08825 extruded finned tube is a premium bimetallic heat transfer component engineered for extreme corrosive industrial working conditions. It adopts seamless Incoloy 825 base tube complying fully with ASME SB163 specification, paired with cold-extruded integral aluminum spiral fins. This integrated structure eliminates thermal contact resistance, delivers reliable anti-corrosion protection for internal aggressive process fluid while drastically expanding external heat exchange area for efficient air-side cooling & heating.

1. Base Tube: ASME SB163 UNS N08825 Seamless Nickel Alloy Tube

UNS N08825, commercially named Incoloy 825, is a nickel-iron-chromium alloy reinforced with molybdenum and copper elements, strictly manufactured per ASME SB163 standard for seamless heat exchanger tubing.

(1). Chemical Composition (Mass %, compliant with ASME SB163 seamless tube standard, annealed state)

Source: Official ASME SB163 & UNS N08825 material specification

(2). Mechanical Properties (Room Temperature, Annealed seamless tube per ASME SB163 standard)

Supplementary Notes for Extruded Finned Tube Application

• The base tube is delivered in full annealed condition to match cold extrusion fin forming;
• These mechanical indicators guarantee structural stability under long-term alternating temperature, vibration and medium pressure inside the finned tube;
• Alloy composition targets chloride stress corrosion cracking, acid medium erosion for heat exchanger service.

2. Extruded Integral Aluminum Fin Construction

We sleeve high-purity 1060 aluminum casing outside the qualified N08825 base tube, then apply high-pressure cold extrusion to mold continuous spiral fins directly onto the tube surface:

• Zero-gap mechanical metallurgical bonding between fins and base tube; no loose fitting, soldering gaps or adhesive layers
• Minimal thermal resistance ensures rapid heat conduction from alloy tube wall to outer fins
• Aluminum outer layer provides extra physical shielding against atmospheric abrasion and salt fog erosion
• Customizable fin height, fin density and wall thickness to match customized heat load requirements

3. Core Competitive Advantages

• Unmatched Anti-Corrosion Performance
  • The inner N08825 alloy safeguards equipment lifespan when conveying seawater, brine, acidic chemical media and sour natural gas; avoids frequent tube leakage and replacement caused by corrosion failure.
• Ultra-Efficient Heat Transfer Efficiency
  • External heat exchange surface area increases 5–15 times compared with plain smooth tubes, greatly improving convection heat exchange efficiency for air-cooled heat exchangers and air coolers.
• Ultra-Long Structural Service Life
  • Integrally extruded fins never fall off under long-term vibration, thermal cycling and airflow scouring; low later maintenance and replacement expenditure.
• Full Standard Compliance & Traceability
  • Whole production process follows ASME SB163 norms, supporting SGS, TUV, BV third-party material testing, NDT non-destructive inspection and full material test report (MTR) provision.
• High Customization Flexibility
  • Support straight tubes, U-bend tubes, coil tubes; adjustable tube outer diameter, wall thickness, fin specifications, total length and surface treatment as per client engineering drawings.

4. Target Industrial Application Scenarios

Our ASME SB163 N08825 extruded finned tubes are widely deployed in harsh-condition heat exchange systems across global heavy industries:

• Oil & Natural Gas Industry: Offshore platform air coolers, sour gas processing heat exchangers, refinery process condensers
• Chemical Processing Plants: Sulfuric acid & phosphoric acid production cooling units, acid medium heat exchangers, fertilizer project thermal equipment
• Marine & Desalination Engineering: Seawater cooling condensers, brine handling heat exchange pipes resisting chloride corrosion
• Thermal & Geothermal Power Plants: Flue gas desulfurization (FGD) auxiliary coolers, high-corrosion circulating cooling systems
• Offshore Energy Facilities: Salt fog resistant air cooling equipment for coastal industrial bases

5. Why Choose Extruded Finned Tubes over Welded/L-foot Fin Tubes

• No galvanic corrosion risk at the joint position compared with welded or wrapped L-type fins
• Far lower thermal resistance guarantees stable heat transfer efficiency during long-term operation
• Stronger mechanical bonding adapts to high airflow velocity and mechanical vibration working conditions
• No peeling or deformation of fins under repeated hot-cold cycling