Monel 400 Embedded G-Fin Tube, Nickel Alloy Steel Bare Tube With Aluminium Fin, For Seawater Evaporator

Overview

Monel 400 Embedded G-Fin Tube is a high-performance heat exchanger tube made from Monel 400, a corrosion-resistant nickel-copper alloy. It features embedded G-type fins mechanically locked into grooves on the tube's outer surface, significantly increasing heat transfer efficiency. This design offers excellent durability, resistance to seawater and chemical corrosion, and is ideal for use in marine, petrochemical, and power generation applications.

1. Monel 400:

• Type: A nickel-copper alloy (roughly 67% Ni, 23% Cu)

• Key Properties:

  • Excellent corrosion resistance (especially in seawater and acidic environments)

  • High strength and toughness over a wide temperature range

  • Good resistance to stress corrosion cracking and pitting

Applications: Used in marine, chemical, and petrochemical industries—particularly in environments involving aggressive fluids like saltwater, hydrofluoric acid, and sulfuric acid.

2. G-Fin (Embedded Fin):

• Design: A type of integral fin tube where metallic fins are embedded into grooves machined into the base tube.

• Manufacturing:

  • Grooves are cut into the tube's outer surface.

  • Fins (usually of another metal) are inserted and mechanically locked by rolling or compression.

• Purpose:

  • Increase the external surface area to improve heat transfer efficiency

  • Reduce fouling and promote better cleaning in some applications

Core advantages of Monel 400 Embedded G-Fin Tube

Corrosion resistance enhancement: The combination of the base tube's resistance to hydrofluoric acid and seawater corrosion with the fin structure solves the problem of conventional carbon steel finned tubes being prone to failure in acidic/marine environments

Heat transfer efficiency improvement: The expanded surface area of the fins can reach more than 8 times that of the light tube, significantly improving the problem of low heat transfer coefficient on the gas side (such as smoke and air) (original h ≈ 30-50 W/(㎡·℃))

Long life design: Monel400's resistance to pitting corrosion and wear resistance of fins extend equipment maintenance cycles, making it suitable for continuous operation scenarios

Benefits of Monel 400 Embedded G-Fin Tube:

• Improved thermal performance in compact heat exchanger designs

• Better fin bonding = more durable than surface-bonded fins

• Common in air-cooled heat exchangers, oil coolers, and chemical process equipment

Application for Monel 400 Embedded G-Fin Tubes

• Heat exchangers in offshore platforms

• Refinery and chemical plants with highly corrosive fluids

• Marine cooling systems

• Power generation (especially where fouling resistance is critical)