Product Details

Specifications

electric resistance welding studded tube
A106GrB, A335 P5/P9,A204 TP304
tube od:60-219mm
tube thickness:4-20mm
length:3-24M

Electric resistance welding STUDDED TUBE

Specification of plc welding 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	1-15m
Base Tube Material: A106GrB, A335 P5/P9 A204 TP304
Stud Material: CS ANSI 410, SS304 5%Cr-1/2Mo

Application of studded tubes

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 applictions where the surface is exposed to a very corrosive environment and where very dirty gas streams require frequent or

aggressive cleaning. Studded tubes are two or three times the square of light Tubes. Due to the usage of studded Tubes, the hot strength can be

obtained as the same as radiation in the reasonable design. Studded Tubes manufactured by our company adopt resistance welding method.

Welding process is controlled by PLC program. Feeding motor and graduation use servo motor. Studded number can be set via the human-computer interface. The graduation parameter and compensating coefficient can be set according to technical requirements to ensure the

quality and precision of products.

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

About us

Our company: Manufacturer,Exporter

Established in:2003

Location:Wuxi,Jiangsu

Address:Shiliu Road, Hongxiang, Hudai, Binhu, Wuxi, 214161, Jiangsu, China

Employees:50~100persons

Product range: flanges,tube sheet/baffle/support plate, finned tube,studded tube,seal head,gasket, pipe fitting,fire arrestor,etc

Skype: yinsu.shine

Email:syx9813 (at )163 dot com / yinsu.shine (at )facebook dot com

Tel: 86-510-85871033

Fax:86-510-85871386

Office:Rm.2216,Wanda Plaza,Liangxi Rd,Binhu District ,Wuxi

Factory: Shiliu Road, Hongxiang, Hudai, Binhu, Wuxi, 214161, Jiangsu, China