ASTM B338 Gr.2 Extruded Finned Tube With Al1060 Fins For Oil & Gas Heat Exchangers

ASTM B338 Gr.2 Extruded Finned Tube With Al1060 Fins For Oil & Gas Heat Exchangers

This is a high-performance heat exchanger tube combining a titanium base tube (ASTM B338 Gr.2) with aluminum fins (Al1060) through an extrusion process.

1. Base Tube: ASTM B338 Gr.2 (Titanium)

Material: ASTM B338 Grade 2 is commercially pure titanium (CP Ti, UNS R50400).

Properties:

Excellent corrosion resistance (especially in seawater, chlorides, acids).

High strength-to-weight ratio.

Good thermal conductivity (lower than copper but better than steel).

Used in marine, chemical, and power industries where corrosion is a concern.

(1). Chemical Composition (ASTM B338 Gr.2)

The composition follows ASTM B338 specifications for Grade 2 titanium:

Key Notes:

Low interstitial elements (O, N, C) ensure good ductility & weldability.

Iron (Fe) improves strength slightly but is kept low for corrosion resistance.

(2). Mechanical Properties (ASTM B338 Gr.2)

Typical mechanical properties for seamless & welded tubes (annealed condition):

Additional Notes:

Excellent toughness even at cryogenic temperatures.

Non-magnetic and biocompatible (used in medical applications).

Corrosion resistance: Outstanding in seawater, chlorides, and acidic environments.

2. Fins: Al1060 Aluminum

Material: 99.6% pure aluminum with high thermal conductivity (~230 W/m·K).

Fin Type: Extruded fins (mechanically bonded to the titanium tube for durability).

Why Aluminum on Titanium?

Aluminum improves heat transfer efficiency while keeping costs lower than all-titanium fins.

The extrusion process ensures a strong bond without welding.

3. Key Features & Advantages

✔ Corrosion Resistance – Ideal for seawater-cooled condensers, desalination plants, and chemical processing.
✔ Lightweight – Titanium + aluminum reduces weight vs. steel tubes.
✔ Thermal Performance – Aluminum fins enhance heat dissipation.
✔ Long Service Life – Resistant to pitting, crevice corrosion, and erosion.

The ASTM B338 Gr.2 Extruded Finned Tube with Al1060 Fins is a high-performance heat transfer component designed for demanding environments where corrosion resistance, lightweight construction, and thermal efficiency are critical. Below are its key applications:

1. Marine & Offshore Systems

• Seawater Coolers & Condensers
  • Used in shipboard cooling systems and offshore oil rigs due to titanium’s resistance to saltwater corrosion.
• Desalination Plants
  • Ideal for multi-stage flash (MSF) and reverse osmosis (RO) heat exchangers where aluminum fins enhance heat transfer.

2. Power Generation

• Power Plant Condensers
  • Titanium tubes prevent corrosion from cooling water (especially brackish or seawater), while Al1060 fins improve air-side heat transfer.
• Geothermal & Waste Heat Recovery
  • Resists acidic and high-mineral content fluids in geothermal brines.

3. Chemical & Petrochemical Processing

• Acid Coolers & Reactors
  • Handles HCl, sulfuric acid, and chlorinated solvents better than stainless steel.
• Refinery Heat Exchangers
  • Used in crude oil preheaters and sour gas coolers where H₂S and CO₂ cause pitting in steel.

4. HVAC & Industrial Cooling

• Air-Cooled Heat Exchangers (ACHEs)
  • Aluminum fins maximize heat dissipation in compressor intercoolers and lube oil coolers.
• Process Cooling for Pharmaceuticals/Food
  • Non-toxic and compliant with hygienic standards.

5. Renewable Energy

• Ocean Thermal Energy Conversion (OTEC)
  • Withstands deep seawater corrosion while maintaining thermal efficiency.

Why Choose This Combination?

Industries That Use This Tube

• Oil & Gas (offshore platforms, LNG plants)
• Shipbuilding (naval vessels, cargo ships)
• Chemical Plants (acid production, fertilizer)
• Power Plants (nuclear, fossil, renewable)