ASME SB163 Monel 400 / N04400 Embedded Finn Tube G Type Nickel Alloy Bare Tube

Finned tubes are used in applications involving the transfer of heat from a hot fluid to a colder fluid through a tube wall. The rate at which such heat transfer can occur depends on three factors: (1) the temperature difference between the two fluids; (2) the heat transfer coefficient between each of the fluids and the tube wall; and (3) the surface area to which each fluid is exposed. In the case of a bare (unfinned) tubes, where the outside surface area is not significantly greater than the inside surface area, the fluid with the lowest heat transfer coefficient will dictate the overall heat transfer rate.

SB 163 N04400 Nickel based ASME SB 163 UNS N04400 pipe is known for its resistant to seawater and steam at high temperaturesas.

G-Type Finned Tube Features:

• 1. Compact design
• 2. High-performance
• 3. Easy installation
• 4. Less space required
• 5. Less cabling
• 6. Optimized surface
• 7. Finest technology used
• 8. Average corrosion protection
• 9. Less energy consumption
• 10. Increased reliability
• 11. Low maintenance
• 12. High mechanical resistance

Processes of G-type Finned Tube

In G-type finned tubes, the fins are prepared by embedding the metal strip into a groove. The latter is formed on a base tube. Placing the fin on it, back-filling is done – resulting in strong attachment of the fins to the base tubes. Hence, the name G-Fin Tubes has come up. The three processes mentioned above are carried out simultaneously. Maximum heat transfer is expected out of the g-fin tubes as the fins are strongly attached to the base tube.

The G-type finned tubes usually work at high temperature (with around 400 degree Celsius) applications. Made of copper, carbon, or aluminium, these fins have comparatively less resistance towards atmospheric corrosion. On the other hand, mechanical resistance is acceptable. Stainless steel and carbon steel fin materials are also used, but particular processing and tooling of the steel fin strips are necessary. Air coolers, radiators, etc use the g-fin tubes.

Technical Details/Base Tube Details

Tube Diameter : 20 mm OD Min to 219 mm OD Max.

Tube Thickness : Minimum 2 mm up to 16mm

Tube Material : Carbon Steel, Stainless Steel, Alloy Steel, Corten steel, duplex Steel, Super Duplex Steel, Inconel, High Chrome High Nickle & Incolloy, CK 20 material and some other material.

For a rapid quotation, plz send with following requirement:

Number of pieces

base tube: Diameter, thickness, length and material specification.

Fins: material specification, type (solid or serrated), height, thickness, spacing, finned length and unfinned sections. Weld prep details if required.

Delivery period required.

About Monel 400 Tube

Monel belongs to a group of nickel alloys. It is produced with high concentrations of copper and chromium in their chemical composition. These tubes are designed to suffice in corrosion stress-induced environments. They don’t easily dissociate or deform under any temperatures. The SB 163 N04400 grade is designed with superior strength and excellent mechanical properties. They possess a minimum tensile strength of 550Mpa and a minimum yield strength of 240Mpa. The products from this grade can be easily elongated by 40%.

Monel 400 is a nickel-copper alloy (about 67% Ni – 23% Cu) that is resistant to sea water and steam at high temperatures as well as to salt and caustic solutions. Alloy 400 is a solid solution alloy that can only be hardened by cold working. This nickel alloy exhibits characteristics like good corrosion resistance, good weldability and high strength. A low corrosion rate in rapidly flowing brackish or seawater combined with excellent resistance to stress-corrosion cracking in most freshwaters, and its resistance to a variety of corrosive conditions led to its wide use in marine applications and other non-oxidizing chloride solutions.

Chemical Composition

Mechanical Properties

Physical Properties

Tube Pressure Rating

Industries where G-Type Finned Tubes are used

1. Rubber plants

2. Power plants

3. Petroleum industries

4. Chemical industries

Other Applications

1. Marine engineering.

2. Chemical and hydrocarbon processing equipment.

3. Gasoline and freshwater tanks.

4. Crude petroleum stills.

5. De-aerating heaters.

6. Boiler feed water heaters and other heat exchangers.

7. Valves, pumps, shafts, fittings, and fasteners.

8. Industrial heat exchangers.

9. Chlorinated solvents.

10. Crude oil distillation towers.