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DELLOK SCH 40 Studded Finned Tube For Oil Refineries

1 Piece
$50 - 1000 /Piece/Pieces
DELLOK SCH 40 Studded Finned Tube For Oil Refineries
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Basic Infomation
Place of Origin: China
Brand Name: Dellok Yonghui
Certification: ISO9001
Model Number: Studded Tube
Payment & Shipping Terms
Packaging Details: wooden box
Delivery Time: 1-3 weeks
Payment Terms: T/T, D/A, L/C, D/P, Western Union, MoneyGram
Supply Ability: 1000 piece
Product Description

DELLOK SCH 40 Studded Finned Tube For Oil Refineries



About Us


Dellok(YONGHUI Radiating Pipe Manufacturing Co.,Ltd) was established in 2002, which is located in Nanjing, China.We joined HARBIN AIR CONDITIONING CO., LTD. in 2022 and became the most professional industry manufacturer in 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



Studded Tube Product Description:


The stud pipe or stud tube is used by refining and petrochemical industries for many different applications - including fired heaters and furnaces. It’s also used as an alternative to high frequency welded finned tubes (HF finned tubes).

Studs are attached to the pipe around the circumference in completely opposing pairs by means of electrical resistance welding. They are attached to ensure a high integrity bond for strength and heat flow.

A bonus of studded pipe is that it’s relatively easy to clean. It’s ideal for applications where heavy fouling of the external surface may occur, or for processes undertaken in harsh environments, where dirty fuels are used. The surface can be efficiently shot blasted (without damaging it).


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.


Black Welded Pipe



Studded Tube(Welded Stainless Tube) Advantages:


To increase the surface area of the tube and to protect tube surface from direct exposure to heat /corrosive environment.

Studding reduces 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.

Use of studded tubes is ideal for processes/applications, where dirty fuels are used in harsh environments.


Welded Stainless Tube



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:


High density crude oil is passed through studded tubes which are heated from outside. Liquefied product comes out from the other end, which now can be used for further processing.

At times, navy boilers also require studded tubes, with oval shaped studs welded on them. These are used for heating water in water tube boilers.


Fin 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


Stainless Steel Welded Tube

Product Categories : Studded Tube









Q1: Are you trading company or manufacturer?

A: We are manufacture factory and we can accept OEM order. Welcome to visit our factory and check our products.


Q2: Can I have a sample ?

A: Yes, welcome to place sample order to test and check quality. Mixed samples are also OK.


Q3: What is your the lead time for production?

A: Generally Sample needs 1-3 days, mass production needs 15-30 days, also depends on your request.


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