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DELLOK Stainless Steels U Longitudinal Finned Tube Welded

1 piece
$10 - 1000 /Piece/Pieces
DELLOK Stainless Steels U Longitudinal Finned Tube Welded
Features Gallery Product Description Request A Quote
Application: Heat Exchanger
Fin Connection Type: Welded
Fin End Treatment: Threaded
Fin Height: 1.5mm
Fin Pitch: 2.5mm
Fin Surface Treatment: Polished
Fin Thickness: 0.15mm
Fin Type: Longitudinal
Material: Stainless Steel
Tube Connection Type: Welded
Tube Diameter: 6mm
Tube End Treatment: Threaded
Tube Length: 1000mm
Tube Surface Treatment: Polished
Tube Wall Thickness: 0.5mm
High Light:

U Longitudinal Finned Tube


L 1000mm Longitudinal Finned Tube

Basic Infomation
Place of Origin: China
Brand Name: Dellok Yonghui
Certification: ISO90001
Model Number: Longitudinal Finned Tube
Payment & Shipping Terms
Packaging Details: wooden box
Delivery Time: 1-3 weeks
Payment Terms: L/C, T/T, D/A, D/P, Western Union, MoneyGram
Supply Ability: TBD
Product Description


DELLOK Stainless Steels U Longitudinal Finned Tube



About Us


DELLOK (YONGHUI RADIATING PIPE MANUFACTURING CO.,LTD.) was established in 2002, which is located in Jiangsu, China. After many years of development, the company now has 66 million yuan in fixed assets, more than 200 employees, and 33 technical staffs. We have 4 aluminum processing production lines, with the annual processing capacity of more than 20,000 tons; And we have 5 tube-drawing production lines; 47 fintube production lines, 1 imported production line from American with the brand of McElroy , with the annual production capacity of 12 million meters the above. Quality is the theme of eternal pursuit of winner -Production workshop- Meticulous works, standardized management system and systematic quality assurance are Dellok(YONGHUI)'s best commitment to quality. In Dellok(YONGHUI), the quality control is not only the detection of the final process, but throughout the entire production process. We implement a set of quality control and assurance systems. Each batch of pipes is sampled and tested, and records are kept as a quality guarantee for the final product.


                     DELLOK Stainless Steels U Longitudinal Finned Tube Welded 0

Longitudinal Finned Tube:

Welded Longitudinal Finned Tubes are produced by resistance welding fins in the longitudinal direction along the length of the tube. The fin strip is first formed into a U-shaped channel, such that each leg of the U will form a fin. The channels are cut to the appropriate length and then oriented along the length of the tube and resistance welded in place. The channels are welded in pairs, diametrically opposed — therefore the number of fins specified must always be a multiple of four.

Third Part Inspection is acceptable.


DELLOK Stainless Steels U Longitudinal Finned Tube Welded 1


Advantages of Longitudinal Finned Tube:

Longitudinal Finned Tube Competitive Advantage:

1. Longer working life than others ordinary welding helical fin tubes.

2. Much safer and energy saving.

3. Increase the heat transfer rates for viscous liquids.

4. Perforated fin type used whenever drainage of liquid from fin channels become a problem.

5. Longitudinal fin tubes are widely used in horizontal heat exchangers.


U Longitudinal Finned Tube-111




Product Specification
Tube O.D.: 12~273 (mm) 3/8”~10”(NPS)
Tube Wall Thk.: 2.11~25.4(mm) 0.08”~1”
Tube Length: ≤12000 (mm) ≤39 ft
Fin Thk.: 1.0~1.5 (mm) 0.04”~0.06”
Fin Height: 5~25 (mm) 0.2”~0.98”
Fin Qty: 1U~36U






Product Packaging:

We can package the products according to the customer's requirements to ensure the safe arrival of the products in all kinds of transportation scenarios. If you have special requirements on packaging, please contact us.

Finned tube packaging display




Frequently Asked Questions (FAQ) About Longitudinal Finned Tubes:


1. What Are Finned Tubes Uses?

Finned tubes are particularly useful in the case of air heat exchangers. In an air heat exchanger, the heat transfer is to take place between a liquid and gas. With the heat coefficient of the air side being lower, a finned tube can be exceptionally helpful. A finned tube increases the surface area and thus helps in faster heat transfer between the components.


2. How is fin height calculated?

Length of fin calculator uses Fin length = (Perimeter-(2*Height))/((4*Number of fins)) to calculate the Fin length, The Length of fin formula is defined as the length of the fins required for the effective heat transfer.


3. What is a longitudinal finned Tube?

Longitudinal Finned Tube also called Brown Fintube , which produces by high frequency resistance welding fins in the longitudinal direction with the length of the tubes.


4. What are properties of longitudinal finned tubes?

Improve heat transfer efficiency in efficient space.

Reduces installation space on required heat transfer surfaces.

Reduce the cost of the equipment, and have a high operational reliability.

The pressure drop on the side of the tube is reduced and the operation cost is reduced.

The stiffness of steel tube is improved, and the seismic performance of steel tube is improved.

Enhance heat transfer, reduce flow resistance and metal consumption.


5. What are applications of longitudinal finned tubes?

We supply longitudinal finned tubes for:

double pipe heat exchangers

multi-tube heat exchangers

fire rated heaters

gas coolers

tank heaters

And we are able to accommodate the requirements of various industries, including oil, power, chemical, and petrochemical.


6. How do you control your quality?

We always put quality as the most important thing for customers, and we control the quality from raw material inspection, production checking to water pressure test and strength test. Also the third party can be authorized to check.

Incoming inspection report for bare tube & strip.

Mill test certification for bare tube

Mill test certification for fin

Mill test certification for finned tube

Finned tubes dimension & visual inspection reports



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Get in touch with us
Contact Person : Pax Yang
Tel : +862569521609
Fax : 86-25-6952-5709
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