L Type, LL Type, KL Type, Embedded (G), Extruded Finned Tubes
- Base Tube Grades: TP304/304L, TP316/316L, UNS N08904 (904L), EN 1.4301, EN 1.4307, EN 1.4401, EN 1.4404, UNS S32205/S31803/S32750/S32760, Titanium Gr.2/Gr.5, Nickel 200/201, Monel 400, Inconel 600/601/625, Incoloy 800H/800HT, Hastelloy C22/C276, UNS C11000/C44300/C70600/C71500
- Base Tube OD: 16-219mm
- Base Tube WT: 1 – 8mm
- Length: 1000-22000mm
- Type: Seamless
- Fin Material: AA1050, AA1060, AA1080, AA1100, UNS C10100/C11000
Features
L Type, LL Type, KL Type, Embedded (G), Extruded Finned Tubes
‘L’ FINNED TUBE
The strip material is subjected to controlled deformation under tension giving the optimum contact pressure of the foot of the fin onto the base tube thus maximising the heat transfer properties.
The foot of the fin considerably enhances the corrosion protection of the base tube.
- Maximum working temperature: 150°c
- Atmospheric corrosion resistance: medium
- Mechanical resistance resistance: low
- Fin materials: aluminium, copper
- Tube materials: any theoretical limit
‘LL’ FINNED TUBE
Manufactured in the same way as the ‘L’ finned tube type except that the fin foot is overlapped to completely enclose the base tube thereby giving excellent corrosion resistance. This type of finned tube is often used as an alternative to the more expensive extruded type fin in corrosive environments.
- Maximum working temperature: 180°c
- Atmospheric corrosion resistance: high
- Mechanical resistance: low
- Fin materials: aluminium, copper
- Tube materials: any theoretical limit
‘KL’ FINNED TUBE
Manufactured exactly as the ‘L’ finned tube except that the base tube is knurled before application of the fin foot. After application, the fin foot is knurled into the corresponding knurling on the base tube thereby enhancing the bond between the fin and tube, resulting in improved heat transfer characteristics.
- Maximum working temperature: 260°c
- Atmospheric corrosion resistance: medium
- Mechanical resistance: medium
- Fin materials: aluminium, copper
- Tube materials: any theoretical limit
‘G’ EMBEDDED FINNED TUBE
The fin strip is wound into a machined groove and securely locked into place by back filling with base tube material. This ensures that maximum heat transfer is maintained at high tube metal temperatures.
- Maximum working temperature: 400°c
- Atmospheric corrosion resistance: low
- Mechanical resistance: medium
- Fin materials: aluminium, copper, carbon steel
- Tube materials: any theoretical limit
EXTRUDED FINNED TUBE
This fin type is formed from a bi-metallic tube consisting of an aluminium outer tube and an inner tube of almost any material. The fin is formed by rolling material from the outside of the exterior tube to give an integral fin with excellent heat transfer properties and longevity. Extruded fin offers excellent corrosion protection of the base tube.
- Maximum working temperature: 285°c
- Atmospheric corrosion resistance: high
- Mechanical resistance: high
- Fin materials: aluminium
- Tube materials: any theoretical limit
Technical Specifications
| Product Name | L Type, LL Type, KL Type, Embedded (G), Extruded Finned Tubes |
| Base Tube | TP304/304L/TP316/316L, UNS N08904 (904L), EN 1.4301/1.4307/1.4401/1.4404, UNS S32205/S31803/S32750/S32760, Titanium Gr.2/Gr.5, Nickel 200/201, Monel 400, Inconel 600/601/625, Incoloy 800H/800HT, Hastelloy C22/C276, UNS C11000/C44300/C70600/C71500 |
| Outer Diameter | 16 – 219 mm |
| Wall Thickness | 1 – 8 mm |
| Length | 1000 – 22000m |
| Fin Materials | AA1050, AA1060, AA1080, AA1100, UNS C10100/C11000 |
| Fin Height Range | 6 – 30mm |
| Fin Thickness Range | 0.2-0.6mm |
| No. of Fins per Inch/Fin Pitch | 8 – 16 FPI |
| No. of Fins per Meter/Fin Pitch | 250 – 500 FPM |
| Shape of Tubes | Straight Tube, U-Tube. |
| Packing Details | Tube ends are covered with plastic caps and packed in wooden boxes or steel frame boxes. |
| Place of Origin | Made in China |
| MOQ | 3 Tons/Size |
| inspection Certificate | EN 10204:2005 Type 3.1, EN 10204:2005 Type 3.2 by SGS, BV, TUV |
| Transportation | Railway, By Sea |
Applications
Finned tubes made from stainless steel, nickel and its alloys, copper alloys, and titanium alloys are widely used in various industries due to their excellent thermal conductivity, corrosion resistance, and mechanical properties. Here’s an overview of the applications for each type:
1. Finned Stainless Steel Tubes
Heat Exchangers: Commonly used in industrial heat exchangers, including air-cooled and shell-and-tube types, due to their excellent resistance to corrosion and oxidation at high temperatures.
Power Plants: Utilized in power generation, especially in waste heat recovery systems and boiler economizers, where durability and resistance to high temperatures and pressure are critical.
Petrochemical Industry: Employed in petrochemical processing where corrosive fluids are handled, offering longevity and reliability.
HVAC Systems: Used in heating, ventilation, and air conditioning systems for efficient thermal exchange.
2. Finned Nickel and Nickel Alloy Tubes
Chemical Processing: Ideal for heat exchangers in chemical processing industries where highly corrosive environments exist, such as in the production of caustic soda, chlorine, and acids.
Aerospace and Defense: Applied in heat exchangers and cooling systems for aircraft and military applications, where resistance to extreme temperatures and corrosive conditions is required.
Marine Applications: Utilized in marine environments for seawater heat exchangers due to their excellent resistance to saltwater corrosion.
3. Finned Copper Alloy Tubes
Air Conditioning and Refrigeration: Widely used in air conditioners, refrigerators, and other cooling systems because of copper’s superior thermal conductivity, which enhances heat transfer efficiency.
Electronics Cooling: Employed in cooling systems for electronic devices and components, providing efficient heat dissipation in compact designs.
Automotive Industry: Applied in radiators and oil coolers in vehicles due to their efficient heat exchange properties and resistance to corrosion from coolants and oils.
4. Finned Titanium and Titanium Alloy Tubes
Desalination Plants: Used in evaporators and heat exchangers in desalination plants, where titanium’s resistance to seawater corrosion ensures long service life.
Nuclear Power Plants: Employed in nuclear power plant heat exchangers, particularly in systems exposed to high temperatures and radiation, where material strength and corrosion resistance are crucial.
Pharmaceutical and Food Processing: Applied in industries where cleanliness, non-reactivity, and resistance to contamination are essential, such as in heat exchangers for pharmaceutical production and food processing equipment.
