ASME SB163 N04400 G Type Finned Tube with Al99.5 Fins For Heat Exchanger

The ASME SB163 N04400 G Type Finned Tube refers to a type of heat exchanger tube made from Monel 400 alloy (UNS N04400) with G-type fins. Monel 400 is a nickel-copper alloy known for its exceptional corrosion resistance, especially in marine and chemical environments. The G-type fin refers to a particular design of external fins that enhance the thermal performance of the tube by increasing its surface area for heat transfer.

Key features of ASME SB163 N04400 G Type Finned Tube with Al99.5 Fins:

1. Material ASME SB163 N04400

(1) Chemical Composition of ASME SB163 N04400 (Alloy 400)

Alloy 400 is a nickel-copper (Ni-Cu) alloy with excellent corrosion resistance. The composition (wt.%) is:

Key Notes:

Primary Phase: Solid solution of Ni-Cu, providing good ductility and weldability.

Resistance: Excellent against seawater, sulfuric & hydrochloric acids, and alkaline solutions.

No Molybdenum or Chromium, unlike more corrosion-resistant alloys like Inconel.

(2) Mechanical Properties of ASME SB163 N04400

The mechanical properties vary based on temper (annealed, cold-worked, etc.). Typical values for seamless tubes (SB163) are:

Room Temperature Properties (Annealed Condition)

Elevated Temperature Strength

Impact Toughness & Other Properties

Charpy Impact (V-Notch): ~100 J (high toughness)

Modulus of Elasticity: ~170 GPa (24.6 x 10⁶ psi)

Density: 8.8 g/cm³

Comparison with Other Nickel Alloys

Key Takeaways:

- N04400 (Alloy 400) is strong, ductile, and corrosion-resistant, making it ideal for heat exchangers, condensers, and marine applications.

- G-Type finned tubes with AL99.5 fins leverage its corrosion resistance while enhancing heat transfer via aluminum fins.

2. G Type Finned Tube

G Type (Embedded Fins): This refers to a finned tube design where the fins are mechanically embedded into the base tube (N04400 in this case) for strong metallurgical bonding.

Common Fin Types:

L-Foot (L Type) – Fins wrapped around the tube.
G-Foot (G Type) – Fins are embedded into grooves for better heat transfer and mechanical stability.

3. AL99.5 Fins

AL99.5: High-purity aluminum (99.5% pure) used for the fins due to its excellent thermal conductivity, lightweight, and corrosion resistance.

Why Aluminum Fins?

- Enhances heat transfer efficiency.

- Cost-effective compared to nickel alloy fins.

- Resistant to oxidation in many environments.

4. Key Benefits of ASME SB163 N04400 G Type Finned Tube with Al99.5 Fins:
- The G-type fin design improves tube heat transfer efficiency by increasing surface area.
- Monel 400 offers outstanding resistance to stress corrosion cracking, pitting, and crevice corrosion in harsh environments.
- Suitable for high-temperature and high-corrosion applications, making it highly versatile for industrial heat transfer systems.

The primary applications of ASME SB163 N04400 G-type finned tubes include:
1. Heat Exchangers
- Used in shell and tube heat exchangers, air-cooled heat exchangers, and other thermal systems due to the enhanced thermal efficiency provided by the fins and Monel 400's corrosion resistance.
- Suitable for applications requiring efficient heat transfer in corrosive environments, such as marine and industrial processes.

2. Petrochemical and Chemical Processing
- Ideal for use in chemical production plants due to its resistance to acids, alkalis, and saline solutions. The finned tube improves the heat transfer in processes involving corrosive media.
- Commonly found in reactors, condensers, and other heat transfer equipment in these industries.

3. Marine Applications
- Excellent for heat exchangers in seawater cooling systems, desalination plants, and shipbuilding due to Monel 400's resistance to saltwater and marine atmospheres.

4. Oil and Gas Industry
- Used in offshore platforms and refineries for heat exchange systems where resistance to sour gas (hydrogen sulfide) and seawater is essential.
- Suitable for cooling and heating fluids in harsh environments.

5. Power Generation
- Applied in power plants, especially in environments where corrosion resistance is vital, such as cooling systems facing seawater or fouling conditions.

6. Aerospace Industry
- Used in thermal systems exposed to corrosive fluids or environments due to the alloy's ability to withstand extreme conditions.

7. Pollution Control Equipment
- Incorporated in heat exchangers for emissions control systems, such as scrubbers, where corrosive chemical exposure is common.