Elliptical Finned Tube oval rectangular finned tube For Heat Exchangers

Elliptical Finned Tube oval rectangular finned tube For Heat Exchangers Featured Image
  • Elliptical Finned Tube oval rectangular finned tube For Heat Exchangers
  • Elliptical Finned Tube oval rectangular finned tube For Heat Exchangers
  • Elliptical Finned Tube oval rectangular finned tube For Heat Exchangers

Short Description:

Oval rectangular finned tube, oval oval finned tube, oval circular finned tube, helical oval flat tube, oval H-shaped finned tube
Elliptical Finned Tube is an elliptical seamless tube as the base tube, which uses aluminum fin strips or copper fin strips to spirally and tightly wrap around the outer surface of the base tube under tension.
Elliptical Finned Tube is a heat exchange element consisting of a base tube elliptical tube and outer fins.

Common ones are Elliptical rectangular finned tubes,

Because Elliptical Finned Tube has superior performance than round finned tube, Elliptical Finned Tube is receiving attention, and Elliptical Finned Tube has been widely used in ethylene, oil refining and other industrial fields. Elliptical Finned Tube is used in heat exchange equipment as a high-efficiency heat exchange element. The flow resistance outside the tube is small and the heat exchange efficiency is high, which makes the heat exchange equipment tend to be compact, lightweight, efficient and miniaturized. Although much research has been done on them, there is still a lot of research work to be done.


Product Detail

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Elliptical Finned Tube Quick Details

KL Type Finned Tube for Heat Exchanger Quick Details:
Core tube material:
1. Carbon steel: A179, A192, SA210 Gr A1/C, A106 Gr B
2. Stainless steel: TP304/304L, TP316/TP316L
3. Copper: UNS12200/UNS14200/UNS70600, CuNi70/30, CuNi 90/10
4. Titanium: B338 Gr 2
Fin material:
1. Aluminum (Alu.1100, Alu.1060)
2. Copper.
3. Steel
Fin type: Solid plain
Outer diameter (OD): According to customer's request
Tube length: up to 18,000 mm.
Fin height: 16.5mm max.
Fin thickness: generally 0.4mm~0.6mm
Fin pitch: 2.1mm minimum (12FPI)
Surface Protection: Both bare ends shall be zinc or aluminum metallized by electrospray arc system coating.
Accessories: Tube support boxes, clamps or spacer boxes (materials: aluminium, zinc and stainless steel).

Additional Info
Payment Terms:T/T, LC
Delivery: 15-30 days after payment
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package: Iron frame packing boxes and the desiccants are put into each package for continental transportation as well. or as required

Common Specifications of Elliptical Finned Tube

  General Descriptions of Studded tubes

Popular Specifications we make

Tube OD(mm)

OD38mm~OD219mm

Tube Wall Thickness(mm)

4mm~15mm

Tube Length(mm)

16,000mm Max.

Studs OD(mm)

OD6mm~OD16mm

Studs Height(mm)

10mm~45mm

We can customize Elliptical Finned Tube according to your drawings Example

A5
Tube Material Stainless Steel, Copper, Carbon steel, Alloy
Tube OD 10-57mm
Tube Wall Thickness 1.0mm-4.0mm
Fin Material Aluminum, copper
Fin OD 25~82mm
Fin thickness 0.2~1mm
Fin Pitch 1.8~8mm
Fin Height less than 18mm

Manufacturing Process

An oval seamless tube is used as the base tube, and the finned tube is spirally wound with aluminum fin tape or copper fin tape under tension and tightly wound on the outer surface of the base tube.

Elliptical Finned Tube is combined with two different materials
Core tube material: carbon steel, low alloy steel, stainless steel, brass, copper, copper-nickel alloy, aluminum bronze, nickel alloy.

Core Tube Material

Carbon Steel Tubes

A179, A192, SA210 Gr A1/C, A106 Gr B, A333 Gr3 Gr6 Gr8, A334 Gr3 Gr6 Gr8, 09CrCuSb, DIN 17175 St35.8  St45.8, EN 10216 P195 P235 P265, GB/T3087 Gr10 Gr20, GB/T5310 20G 20MnG,

Alloy Steel Tubes

A209 T1 T1a,A213 T2 T5 T9 T11 T12 T22 T91,A335 P2 P5 P9 P11 P12 P22 P91,EN 10216-2 13CrMo4-5 10CrMo9-10 15NiCuMoNb5-6-4

Stainless Steel Tubes

TP304/304L, TP316/TP316L TP310/310S TP347/TP347H

Copper Tubes

UNS12200/UNS14200/UNS70600, CuNi70/30, CuNi 90/10

Titanium Tubes

B338 Gr 2

Fin material: aluminum, copper, steel
1. Aluminum (Alu.1100, Alu.1060)
2. Copper.
3. Steel

Quality Control

Inspection and Tests Performed
Chemical Composition inspection,
Mechanical Properties Test(Tensile Strength, Yield Strength, Elongation, Flaring, Flattening, Hardness, Impact Test), S
surface and Dimension Test,
No-destructive Test,
Hydrostatic Test.

Delivery conditions

The tube ends are square cut without burrs, the inside is dry and blown clean, and the ends of the L-shaped tension wound finned tube are coated with varnish on the outside.

Acceptance Criteria

API Standard 661 (Air-Cooled Heat Exchangers for General Refinery Service) or Delivery Conditions (TDC).

Features of Elliptical Finned Tube

(1) Compared with the round tube finned tube, the Elliptical Finned Tube is easier to achieve a compact arrangement, which reduces the overall volume of the entire heat exchanger, thereby reducing the footprint.
(2) Due to the shape characteristics of the Elliptical Finned Tube, the air-side resistance is small, and the heat transfer coefficient between the fluids increases; the thermal resistance in the tube is relatively small, which increases the heat transfer of the fluid in the tube.
(3) The heat transfer area of ​​the Elliptical Finned Tube is larger than that of the circular tube of the same cross-sectional area, because the heat transfer periphery of the elliptical tube is relatively long under the same cross-sectional area.
(4) Rectangular steel fins are the most commonly used in Elliptical Finned Tubes, which have high strength, and the base tube is not suitable for frost cracking in winter and has a long service life.
(5) Since the Elliptical Finned Tube can be arranged more compactly, the front row tube has a greater impact on the rear row. The fin spacing of the rear row tube can be increased to reduce the flow resistance outside the tube, but the number of tube rows should not be too large.

Application of Elliptical Finned Tube

Application: The convection chamber of the heating furnace in the petrochemical industry is used in the Elliptical Finned Tube
, which can increase the heat transfer coefficient on the gas side, and the area of ​​the elliptical tube is 2 to 3 times that of the straight tube. Due to the application of Elliptical Finned Tube, in the design of this case, the same radiation intensity can get the same thermal intensity.
It uses winding technology, ranging from stable, segmented combination and firm, to surface galvanized and nickel-based brazing, depending on the application. has a high heat transfer efficiency, while the wind side has a small
Compared with the section of the circular tube, the heat transfer coefficient can be increased by 25%, and the air resistance can be reduced by 15%-25%.

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