Jiangsu Liangyi Co., Limited

Studded Tubes, Studded Pipes, Welding Studded Tubes manufacturer / supplier in China, offering High Frequency Welding Studding Studded Pipes Tubings Tubes For HRSG refinery furnaces Air Cooler, China Forged Steel Ring Gears, A182-F91 (A182-F92, A182 F91, P91, P92, A182 F92) Forging Forged Steel Hollow Bars Sleeves Bushing Pipe Tubes Bushes Tubings Hubs Casing Cylinders and so on.

Supplier Homepage Product List Studded Tubes/Pipes High Frequency Welding Studding Studded Pipes Tubings Tubes For HRSG refinery furnaces Air Cooler

High Frequency Welding Studding Studded Pipes Tubings Tubes For HRSG refinery furnaces Air Cooler

FOB Price:US $1 / Piece
Min. Order (Pieces) FOB Price
1+ US $1 / Piece
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Min. Order: 1 Piece
Port: Shanghai, China
Production Capacity: 5000 Tons/Year
Payment Terms: T/T

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Basic Info.

Model NO.:Studded Tubes
Type:Welded
Technique:ERW
Material:Carbon Steel
Surface Treatment:Polish
Usage:Pipeline Transport
Section Shape:Round
Type of Tubes:Studded Tubes
material of studded tubes:carbon steel
Trademark:LY
Transport Package:Bundle and Wooden Box Packing
Specification:CE
Origin:Jiangyin
HS Code:722840000

Product Description

We are professional High Frequency Welding Studded Tubes Tubings Studding Studded Pipes for HRSG refinery,furnaces,Air Cooler,boiler,gas turbines,fired heaters,Fluidized Bed Coils from china
Production of studded tubes
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. Alloy steel pipes are stress-relieved after studding, 
according to the relevant specifications for the class and grade of steel used.
Because of their relative easy of cleaning, studded tubes or nail head pipes are used in furnaces and fired heaters as an alternative to high frequency
welded finned tubes wherever the process application is such that heavy fouling of the external surface may occur.
The studs are attached to the pipe in diametrically opposing pairs around the circumference by electrical resistance welding to ensure a high
integrity bond for strength and heat flow. Stud diameter, height and pitch can be specified on an individual basis.
 
Test of studded tubes
Welding tests are carried out as a matter of course to ensure the effectiveness of the stud to pipe bond. Heat treatment of the completed studded 
tube is carried out where necessary. Should fouling eventually reduce the process performance of the equipment, the studded surface can be 
cleaned efficiently by shot blasting without damage to the materials.
An electric current is applied by connect on the stud and tube and theresistance in this circuit produces the heat necessary for welding. Maximum
resistance and therefore maximum heating occurs at the interface Between the Stud and the tube. Pressure to forge the Stud and the tube together 
at the point of maximum heating is applied by various forms of tooling. These resistance welding processes produce a strong metallurgical bond 
between the stud and the tube while minimizing the heat affected zone (HAZ) in the tube. The use of pressure to forge the fin and the tube 
together helps to minimize the heat input necessary to make the weld. This Product is used in Fired Heaters under Very High Pressure & 
Temperature mainly in Petroleum refineries. 
Studding of pipes up to 8 inch dia and stud diameter up to 18mm can be supplied in Carbon steel, alloy steel and stainless steel pipes.
 
Advantages of Steel studs :
1)Satisfying connection surface, little heat loss .
2)Welding connection rate higher than 90 percent.
3)No need of welding power, hardly any welding tumor .
4)Narrow heated zone on the surface, no melted pool, without destroying the tissue of basic tube.
5) Welding parameters are strictly  set to ensure the quality of bulk studded tube and avoid the instability of manual operation
 
For a rapid quotation requested following information,
Base tube : Diameter, thickness, length and material specification and whether ends are plain or weld prepped.
Studs : Diameter, length or height, number per circumferential row/or circumferential pitch, plus vertical pitch and material specification. 
Number of rows of studs and plain end length
 

Specification of studded Tube

Base Tube O.D
(mm)

Base Tube Thickness (mm)

Tube Height
(mm)

Tube Length (meter)

60 mm ~219 mm

4.0 mm ~20 mm

10 mm ~ 38 mm

1-25m

Base Tube MaterialA106GrB, A335 P5/P9 A204 TP304

Stud MaterialCS ANSI 410, SS304 5%Cr-1/2Mo


High Frequency Welding Studding Studded Pipes Tubings Tubes For HRSG refinery furnaces Air Cooler
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