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DELLOK Carbon Steel Studded Tube For Air Cooler

1 piece
$2000 - 50 /Piece/Pieces
DELLOK Carbon Steel Studded Tube For Air Cooler
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Application: Industrial
Material: Stainless Steel
Shape: Round
Size: Customized
Studded Angle: Customized
Studded Color: Silver
Studded Diameter: Customized
Studded Height: Customized
Studded Number: Customized
Studded Pitch: Customized
Studded Shape: Round
Studded Surface Treatment: Polishing
Studded Type: Round
Surface Treatment: Polishing
Basic Infomation
Place of Origin: China
Brand Name: Dellok Yonghui
Certification: ISO90001
Model Number: Studded Tube
Payment & Shipping Terms
Packaging Details: wooden box
Delivery Time: 1-3 weeks
Payment Terms: D/A, D/P, T/T, Western Union, MoneyGram, L/C
Supply Ability: TBD
Product Description

DELLOK Carbon Steel Studded Tube For Air Cooler



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 Carbon Steel Studded Tube For Air Cooler 0


Studded Tube Product Description:

Resistance Welding of Studs on Bare Tubes is used to create the studded Fin Tube.

The fins are made via electrical resistance welding of the Fin Material, which is essentially a stud or rod welded to the tube at the base.

The current is directed through the Tube and the studs’ bases. The studs are created in certain shapes to help with the welding process. The Stud is manually forced on the tube at the site of welding during the finning “welding” process, resulting in a very good mechanical bond. Fin Tubes of this sort are well-suited to high-pressure and high-temperature applications. The mechanical bond is quite strong, thus it is used in places where there will be a lot of mechanical pressure and stress during the process or cleaning, for example.

Fin Tubes are used in Finned Pipes, Air Coolers, Heat Exchangers, and other applications, and are favoured in industries such as Petrochemical Refineries, Power Plants, Chemical Industries, Steel Plants, and so on.

Studded Tube


Studded Tube(Stainless Steel Welded Tube) Manufacturing Process:


The steel studs are automatically resistance welded to the tube, producing high quality forge welds. The welding process enables the combination of any grades for studs and tube: carbon, low alloy, stainless steels and high nickel alloys.


Welded Stainless Tube


Studded Tube(Welded Stainless Tube) Advantages:

Due to their high rigidity, studded tubes can be used even under extreme temperature and pressure conditions.


Black Welded Pipe


Studded Tube(Black Welded Pipe) Properties:

Manufacturing Process:- Electric Resistance Welding

Fin To Tube Bond:- Excellent

Heat Transfer Efficiency:- Excellent

Mechanical Resistance:- Excellent (Hence can be frequently cleaned with high pressure jets unlike other fin tubes. Thereby reducing down time and increasing overall life)

Corrosion Protection:- Gives excellent corrosion protection to the base tube since it entirely covers the base tube (except bare ends).

Temperature Range:- Depending on Properties of material of Fin (Stud) and Pipe


Weld Galvanized Pipe


Studded Tube(Weld Galvanized Pipe) Applications:

Steel studded tubes are used instead of finned tubes for heat transfer in the processing industries, generally in furnaces, gas turbines, fired heaters and furnace applications where the surface is exposed to a very corrosive environment and where very dirty gas streams require frequent or aggressive cleaning


Stainless Steel Welded Tube


Studded Tube(Fin Tube) Specifications:

Product Specification
Tube OD 25~273 (mm) 1”~10” (NPS)
Tube Wall Thk 3.5~28.6 (mm) 0.14”~1.1”
Tube Length ≤25,000 (mm) ≤82 ft
Stud Thk 6~25.4 (mm) 0.23”~1”
Stud Height 10~35 (mm) 0.4”~1.38”
Stud Pitch 8~30 (mm) 0.3”~1.2”
Stud Type Cylindrical, Elliptical, Lens type
Stud to tube surface angle Vertical or Angular
Material Combinations
Stud Material C.S. (most common grade: Q235B)
S.S. (most common grade are AISI 304, 316, 409, 410, 321,347)
Tube Material C.S. (most common grade: A106 Gr.B)
S.S. (most common grade are TP304,316, 321, 347)
A.S. (most common grade are T/P5,9,11,22,91)
Type of Service High temperature




Fin Tube

Product Categories : Studded Tube




Product Description



Studded tubes are used as substitution of finned tubes for heat transfer in the petrochemical industry, generally in fired heaters and boilers where the surface is exposed to a very corrosive environment and where very dirty soot formation require frequent or aggressive cleaning.


Studded Tube




The studs are automatically welded to the tube by electric resistance welding machine. The welding process is controlled by PLC program, stepping motor, indexing adopt brake motor. All the welding parameters such as number of studs, pitch, compensation coefficient etc. are input via human machine interface(HMI), Product quality could be guaranteed by the settings according to the process requirements.

The automatic stud feeder was developed by our engineers combining both our large experience manufacturing extended surface and the most modern control technology available in the market. The technology has benefited us with more efficient production and consistent welding quality.


Welded Stainless Tube





Murphy's studded tubes are generally installed in the convection sections and boilers where the surface is exposed to a severe operating case of dirty flue gas.


Stainless Steel Welded Tube



Frequently Asked Questions (FAQ) About Studded Tubes:


1. What is a Studded Tube?

Studded tubes are a type of metal tubes. These tubes have studs welded onto the metal tube.

These studs are arranged in a specific formation throughout the length of the tube.

They are often used in boilers and refineries. As they increase the surface area for higher heat transfer they are used for reheating.


2. Why use studded tubes?

The heat exchange efficiency is equivalent to 2-3 times that of the bare pipe.

Easier cleaning especially for operating cases with very dirty flue gas produced by burning heavy oil, diesel or residual oil.

To increase the film heat transfer coefficient of flue gas to the furnace tube.

Increase efficiency in the process of heat recovery and direct flame hostile atmospheres.

Reduce the amount of bare pipes used in these processes. (Heat transfer surface of one studded pipe is equivalent to surface of 4 to 10 bare pipes). Stud Pipe's ideal for processes applications where dirty fuels are used and harsh environments in terms of temperature and/or corrosion.

Studded fin tube is a standard frequency electric-resistance-welded studded type surface. It is normally manufactured with round carbon steed studs on carbon, alloy or stainless steel tubes with diameters from 1.5" to 12.75".


3. What are the important factors for high frequency welding?

The four most important factors / process parameters influence High frequency welding are

Electrical power

Pressure applied

Welding time

Cooling time

Finding the optimal process parameters will depend on your specific equipment, the materials involved and the specific geometries including thickness and area to be welded. Achieving optimal results is often an experimental process guided by experience. As a guiding rule, the thicker material and focus on short weld times you need, the stronger electrical power / HF generator you need.


4. What is High Frequency welding?

High frequency welding (often abbreviated HF welding or RF welding) is a manufacturing process where two plastic parts are welded together using an electromagnetic field. The resulting join can be very strong – often close to the original strength of the materials joined. In some scenarios the weld can be even stronger than the original materials.

Using a high frequency electromagnetic field, the material is heated and pressure added to melt and fuse the two materials together. No outside heart is applied. Instead the heat is generated within the materials. During cooling (under continued pressure), the materials are fused together and a weld has been created. This results in a very strong bond between the two parts.


5. Where are Studded Tubes used?

Studded tubes are used instead of finned tubes for heat transfer in the processing industries, generally in furnaces, gas turbines, fired heaters and furnace applications where the surface is exposed to a very corrosive environment and where very dirty gas streams require frequent or aggressive cleaning.


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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