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Embedded Finned Tube , ASME SB163 Monel 400 / UNS N04400 Bare Tube with G Fins

G-type Embedded Fin Tube ASME SB163 Monel 400 Nickel Alloy Bare Tube with Aluminum Fin

G-type embedded fin tube is a type of circumferentially finned tube where the fin is mechanically embedded into a groove that is ploughed into the tube and locked into place by rolls that force the groove to tightly close around the fin base. We can supply the G-Fin Tubes in the following combinations of Base Tube and Fin Material:

Base Tube Material: Carbon Steel, Alloy Steel, Mild Steel, Stainless steel and tubes manufactured by ERW or Seamless Process

Fin Material: Aluminum, Copper

What is G-Fin Tube or Embedded Fin Tube?

The embedded fin tube or G fin tube is an extended surface fin tube where the fins are externally applied on the base tubes. A groove is formed continuously on the base tube and the fin edge is inserted in the groove. After the fin is inserted in the groove a set of rollers is used to back fill the groove and the fin is then securely embedded in the base tube.

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

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.

ASME SB163 UNS N04400 / Monel 400 Nickel Alloy Tube Chemical Composition

Grade	C	Mn	Si	S	Cu	Fe	Ni	Cr
Monel 400	0.30 max	2.00 max	0.50 max	0.24max	28.0-34.0	2.50 max	63.00 min	–

ASME SB163 UNS N04400 / Monel 400 Nickel Alloy Tube Mechanical Properties

Element	Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
Monel 400	8.8 g/cm3	1350 °C (2460 °F)	Psi – 80,000 , MPa – 550	Psi – 35,000 , MPa – 240	40 %

ASME SB163 UNS N04400 / Monel 400 Nickel Alloy Tube Physical Properties

Properties	Metric	Imperial
Density	8.8 gm/cm3	0.318 lb/in3

ASME SB163 UNS N04400 / Monel 400 Nickel Alloy Tube Pressure Rating

Tube O.D. (in.)	Wall Thickness of Tube (inches)
	.028	.035	.049	.065	.083	.095	.109	.120
	Working Pressure (psig)
1/8	7900	10100
1/4	3700	4800	7000	9500
5/16		3700	5400	7300
3/8		3100	4400	6100
1/2		2300	3200	4400
3/4			2200	3000	4000	4600
1				2200	2900	3400	3900	4300

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.

11. Rubber plants

12. Power plants

13. Petroleum industries

14. Chemical industries

Finned tubes increase outside the surface area. By having a finned tube in place, it increases the overall heat transfer rate. This then decreases the total number of tubes required for a given application which then also reduces overall equipment size and can in the long-run decrease the cost of the project. In many application cases, one finned tube replaces six or more bare tubes at less than 1/3 the cost and 1/4 the volume.

For applications that involve the transfer of heat from a hot fluid to a colder fluid through a tube wall, fin tubes are used. Usually, for an air heat exchanger, where one of the fluids is air or some other gas, the air side heat transfer coefficient will be much lower, so additional heat transfer surface area or a fin tube exchanger is very useful. The overall pattern flow of a finned tube exchanger is often crossflow, however, it can also be parallel flow or counterflow.

Fins are used to increase the effective surface area of heat exchanger tubing. Furthermore, finned tubes are used when the heat transfer coefficient on the outside of the tubes is appreciably lower than that on the inside. In other words, heat transferred from liquid to gas, vapor to gas, such as steam to air heat exchanger, and thermic fluid to air heat exchanger.

G-Type Finned Tube Features