What is stainless steel fin tube?
The Fin Tubes are used in applications wherein heat transfer occurs from a hot fluid to a cold one through a tube wall. They come with their fins which help to increase the surface area against which the outer fluid would come in contact. The Stainless Steel Fin Tubes are used with shell and tube heat exchangers to enhance the heat transfer process between the inside and outside of the tube. The Extruded Fin Tube manufacturer In India produces fin tubes for a wide range of applications like coils for hybrid cooling towers, the chemical industry, surface coating productions, and so on.
Difference between low fin tube & high finned tubes
The Low Fin Tubes has rotational processing of the steel tube’s outer surface to create a fin shape. It is essentially a single integral tube made of a single piece of material. They have a smaller fin, about 1/16th of an inch of the fin height. The Low Fin Tubes For Heat Exchangers are generally used in liquid to gas or liquid to liquid applications like chillers, condensers, etc.
The use of High Finned Tubes helps to attain a large surface area to optimize the heat transfer between the fluid and the tubes wall. They have exceptional temperature control efficiency in different types of environments. Available in customizable sizes, the tubes are used in industries like power generation, chemical processing and HVAC systems.
Stainless steel fin tube
SS 316 Low finned tubes
Extruded fin tube
What is stainless steel stud finned tube?
They are Welded Square Fin Tubes are manufactured by resistance welding of the studs on the bare tubes. The fins are manufactured when the fin material is welded at the base to the tubes through the ERW process.
Table of Contents
Specifications of stainless steel extruded finned tube
|Diameter||Material||No. of Fins per Inch|
|12.70mm, 19.05mm, 15.88mm, 25.40mm, 22.20mm, & 38.10mm||Seamless - SA-213 TP304L, TP304, TP316, TP316L
: Welded - SA-249 TP304, TP316, TP304L, TP316L
|19, 26, 28, 32 FPI|
|1.42mm up to 3.25mm||
|Fin Heights||Fin Thicknesses||Applications|
|¼” to 1″||20 ga. (.035″) to 12 ga. (.102″)||Condensers, exchanger and evaporators|
Stainless steel fin tube types
Integral low fin tubes
Stainless steel extruded finned tubes
SS 304 lowfin tubes
316 stainless steel high finned tubes
High frequency welded fin tubes
SA 213 TP304 low fin tubes
Stainless steel low finned tubes
SA 249 TP316L Welded square fin tubes
SS fin tube
SS 316 low finned tubes fetaures
Low fin tube dimensions
|Standard Dimensions - Low Finned Tubes|
|12.00 ÷ 60.00||0.47 ÷ 2.4|
|0.635 ÷ 4.572||23 ÷ 7|
|0.3 ÷ 25||1 ÷ 82|
|8 ÷ 40||315 ÷ 1575|
SS 304 lowfin tube sizes
|Description||Fin specification (mm)|
|Fin pitch||Fin height||Fin thick|
|Extruded||8-51||Single metal combined metal||1.6-10||<17||0.2-0.4|
|10-38||Low fin tubes t-type fin tubes||0.6-2||<1.6||~0.3|
|16-51||Bamboo tube corrugated tubes||8-30||<2.5||/|
|Embedded||16-63||G-type fin tubes||2.1-5||<17||~0.4|
|Wound||16-63||l/kl/ll type fin tubes||2.1-5||<17||~0.4|
|String||25-38||String fin tubes||2.1-3.5||<20||0.2-0.5|
|Welding||16-219||HF-welding fin tubes||3-25||5-30||0.8-3|
|25-63||H/HH type fin tubes||8-30||<200||1.5-3.5|
|25-219||Studed fin tubes||8-30||5-35||φ5-20|
Production techniques of 316 stainless steel high finned tubes
Extruded fin tube techanical details
|TUBES SIZES||3/4" O.D. TO 8" NPS (8.625" O.D.)|
|FIN HEIGHTS||3/8" TO 1 1⁄2"|
|FIN THICKNESS||20 GA. (.035") TO 12 GA. (.102") SEGMENTED WIDTH: 4.5MM OR 8MM|
|SEGMENT WIDTH||4.5MM OR 8MM|
|FIN PITCH||1 TO 7 FINS PER INCH|
|MATERIAL||ANY MATERIAL OR COMBINATION THAT CAN BE RESISTANCE OR ARC WELDED.|
Integral low fin tubes applications
Mechanical properties of high frequency welded fin tubes
|Material||Temperure||Heat||Yield Stress||Tensile Stress||Elongation %, Min|
|Min.||Treatment||Ksi (MPa), Min.||Ksi (MPa), Min.|
|º F(º C)|
SA 213 TP304 low fin tubes chemical composition
|T304/L (UNS S30400/UNS S30403)|
|Cr||Chromium||18.0 – 20.0|
|Ni||Nickel||8.0 – 12.0|
|T316/L (UNS S31600/UNS S31603)|
|Cr||Chromium||16.0 – 18.0|
|Ni||Nickel||10.0 – 14.0|
|Mo||Molybdenum||2.0 – 3.0|
Stainless steel low finned tubes equivalent
|ASTM A213/269/249||UNS||Material No. (WNr)||EN 10216-2 Seamless / EN 10217-5 Welded|
What is L type finned tube?
For the L Type Finned tubes, the finning process is done by spirally wrapping the fin stock around the tube’s base. This is why they are also known as Spiral Finned Tubes. Here, the base of the fin stock is shaped like an ‘L,’ which helps the base to stand firmly.
What is stainless steel longitudinal finned tube?
The Stainless Steel Longitudinal Finned Tubes are produced by resistance welding the fins in diametrically opposite pairs. Herein, the channels are welded on the tube's external surface, increasing their efficiency. The longitudinal Extruded Finned Tubes must have fins that are multiples of four and are used in gas coolers, fire-rated heaters, tank heaters, etc.