1. What is ASME SB163 N04400 G-Type Fin Tube?
Engineered for marine/chemical high-corrosion scenarios, this Monel 400 (UNS N04400) nickel-copper alloy fin tube meets ASME SB163 standards, featuring helically wound G-type fins cold-formed from the same material for an integral monolithic design. It eliminates galvanic corrosion risks, excelling in seawater, hydrofluoric acid, and high-velocity steam up to 480°C (896°F). With 5x longer lifespan than stainless steel in chloride-rich services, it’s the trusted choice for offshore platforms and chemical processing plants.
2. Chemical & Mechanical Properties
Chemical Composition (Per ASME SB163/ ASTM B163)
| Element | Content (%) | Critical Role |
| Nickel (Ni) | 63.0 min | Acid resistance |
| Copper (Cu) | 28.0–34.0 | Seawater immunity |
| Iron (Fe) | ≤ 2.5 | Purity control |
| Manganese (Mn) | ≤ 2.0 | Work hardening |
| Carbon (C) | ≤ 0.3 | Weldability |
| Sulfur (S) | ≤ 0.024 | Corrosion resistance |
| Thermal Conductivity | 21.8 W/m·K (Monel 400) | |
Mechanical Properties (Integral Fin Tube System)
| Property | Value |
| Tensile Strength | ≥ 480 MPa |
| Yield Strength | ≥ 170 MPa |
| Max Service Temp. | 480°C (896°F) |
| Hardness | 65–90 HRB |
| Fin Bond Integrity | Zero detachment at 10,000 cycles |
| Corrosion Rate in Seawater | < 0.025 mm/year |
3. Key Applications & Competitive Advantages
· Offshore Oil & Gas: Seawater coolers on FPSO vessels & platforms.
· Chemical Processing: HF alkylation unit heat exchangers.
· Desalination Plants: Brine heaters in MED/MSF systems.
· Marine Propulsion: Condensers for naval vessels.
· Nuclear Power: Auxiliary cooling systems (ASME III certified).
4. Why This Solution is Unrivaled:
· 20+ Year Lifespan: Verified in North Sea splash zone per NORSOK M-001.
· Zero Maintenance: Immune to pitting/crevice corrosion in chlorides.
· Thermal Efficiency: 22% higher HTC vs. bimetallic tubes (per TEMA data).
· Customization: Fin density (4-12 FPI), tube OD (15.88–50.8mm), and length (≤18m).
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ASME SB163 N04400 Seamless Nickel And Nickel Alloy Embedded G Type Fin Tube For Petrochemical Industry Images
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