Finned steel tube
Product Name:Longitudinal Finned Tubes,High Frequency Welded(HFW) Fin Tube,L Foot Fin Tube,KL Type Fin Tube,LL Fin Tube,Crimped Type Fin Tube,Integral Low Fin Tube,Bimetal Extruded Fin tube,Stud Fin Tube,G Fin Tube,Laser Welded Fin Tube
Base PipeOD: 15.88-273mm
Fin Height: 4.0-50mm
Fin Thickness: 0.3 -1.5mm
Number of Fins: Depending on the tube OD
Fin Pitch:as customer's request.
End: Plain Ends, Beveled Ends
Addess : Huaiyin District, Jinan City, Shandong, China.
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PRODUCT DETAILS


Stud fin tube is made by electrical Resistance welding specially formed Studs(Round pins ) in rows around the tube. The Studs can be supplied in a variety of Sizes and shapes. Also named pin fin tube.Stud tube have a very high heat transfer efficiency.The heat exchange efficiency is equivalent to 2-3 times that of the bare pipe.


Base Tube O.DBase Tube Thickness (mm)Fin HeightTube Length (Mtr)
(mm)(mm)
38 mm ~219 mm4.0 mm ~20 mm6.0 mm ~ 38 mm≤ 15Mtrs
Base Tube MaterialFin Material
Carbon Steel ,Alloy Steel ,Stainless SteelCarbon Steel ,Alloy Steel ,


High Frequency Welded fin tube also called solid type fin tube,use steel or stainless steel strip directly welded to tube surface by HFW.Can improving heat transfer efficiency much more than bare tube.Due to the tight welding of the fins to the base tube, these finned tubes are often used in vibrating conditions.Fin type have Serrated fin and flat fin.


Tube O.D.: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 Dia.: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 Shape:Cylindrical, Elliptical, Lens type
Stud to tube surface angle:Vertical or angular
Stud Material:C.S. (most common grade is Q235B)S.S. (most common grade are AISI 304, 316, 409, 410, 321,347 )A.S.
Tube Material:C.S. (most common grade is 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 )
* This table is used as a general guide to our capabilities, please call us for any other customized cases.


Technical parameter of Studded Tube


High accuracy Laser welded fin tube same with HFW fin tube,use steel or stainless steel strip directly welded to tube surface but by high accuracy laser welded.Welding penetration is nealy100% between fin and tube.


Technical Range
Tube OD(mm)Tube Thickness(mm)Tube Height(mm)
60-2194-2010-38
Material & Length Range
TubeStudTube Length(m)
A106GrB, A335 P5/P9 A204 TP304CS ANSI 410, SS304 5%Cr-1/2Mo1-15 


Specification


L type fin tube, The fin is helically wound around the base tube forming a strong mechanical contact between the tube and fin, thus improving the heat transfer efficiency.Also named Wrap On fin tube. This also give considerable corrosion protection to the base tube.

KL type fin tube same as L fin tube,except that the base tube is knurled before application of the fin foot.Also named Wrap On Knurled type fin tube.After application,the fin foot is knurled into the corresponding knurling on the base tube thereby enhancing the bond between fin and tube,Resulting in improved heat transfer efficiency.


TypeDescriptionBase tubeO.D. (mm)Fin specification (mm)
Fin pitchFin heightFin thick
EmbeddedG-type fin tube16-632.1-5<17~0.4
ExtrudedSingle metal combined metal8-511.6-10<170.2-0.4
Low fin tube t-type fin tube10-380.6-2<1.6~0.3
Bamboo tube corrugated tube16-518-30<2.5/
Woundl/kl/ll type fin tube16-632.1-5<17~0.4
StringString fin tube25-382.1-3.5<200.2-0.5
U-typeU-type tube16-38///
WeldingHF-welding fin tube16-2193-255-300.8-3
H/HH type fin tube25-638-30<2001.5-3.5
Studed fin tube25-2198-305-35φ5-20

 

LL fin tube Same as L fin except the fin foot is overlapped giving more corrosion protection. Also named Over Lapped fin tube. The fin is helically wound around the base tube forming a strong mechanical contact between the tube and fin, thus improving the heat transfer efficiency.This type of finned tube is often used as an alternative to the more expensive extruded type fin in corrosive environments.


Fin materialN° fins per meterStrip thicknessProduction capacity
All type of materialFrom 50 to 500From 0,4mm. to 0,5mm.More than 500 meters per day
Tube materialTube thicknessO.D. tubeLenght available
All type of material1,00mm. minimumFrom 10,00mm. to 200,00mm.All lenghts up to 8 Meters

 

Spiral fin tube,use carbon steel or stainless steel strip direct spiral in tube surface for improving heat transfer efficiency.Fin bottom touch tube surface but not bonded together,keep by Tension of the steel belt itself, both end fins can be permanently bonded to the tube by using solder.Cost is low than HFW fin tube.Also named Crimped fin tube.




Base Tube O.D(mm)Base Tube Thickness (mm)Fin Height (mm)Fin Thickness(mm)Fin NO.(Pc)
25.4 mm ~152.4 mm1.0 mm ~4.0 mm5.0 mm ~16.0 mm0.89 mm ~1.5 mm2 ~ 36
Base Tube MaterialFin MaterialTube Length (Mtr)

Carbon Steel ,Alloy Steel ,Stainless SteelCarbon Steel ,Alloy Steel ,Stainless Steel≤ 15Mtrs



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Finned tube is widely used in chemical industry, air conditioning, etc. Its processing technology includes preparing raw materials, surface treatment, finned processing, welding and surface treatment, etc., which requires strict control of quality and process parameters. High quality finned tubes have the characteristics of efficient heat transfer, corrosion resistance and long life, providing reliable heat transfer elements for various industries.


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The raw materials of finned tubes include seamless steel pipes, welded steel pipes, copper pipes, aluminum pipes, etc. The selection of these materials needs to be determined according to actual needs. Finning process. This process includes cutting, straightening, grooving, drilling and other processes, which need to process these raw materials into the required fin shape and size. The shape of the fin has a variety of choices such as needle, sheet, nail, etc., and the processing method will also vary according to the different materials and needs. The processed fin is welded with the pipe to form a complete finned tube. The surface treatment of the welded finned tube is carried out to remove impurities such as welding slag and burr, and polishing, spraying and electroplating are carried out to improve the heat transfer efficiency and anti-corrosion performance of the finned tube.


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Excellent packaging: waterproof paper and plastic film + iron cover + at least three strapping straps + strapping straps fixed on iron or wood pallets can effectively protect products from corrosion and various climate changes during transportation. Generally speaking, we ship from Shanghai, Tianjin, Qingdao and Ningbo ports. We have worked with many experienced shipping companies for a long time to find the most suitable mode of transportation for you.


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