H Finned Tube is divided into single H Finned Tube and Twin H Finned Tube (HH or Doule H finned tube), also known as Rectangular Finned Tubes. H Finned Tube is made by welding square or rectangular H fins to a steel base tube.
 
Twin H Finned Tube (HH or Doule H Finned Tube)
The fins are divided into two symmetrical halves, the tube wall is pressed from both sides, and the tube wall is welded by resistance welding, leaving a certain gap in the middle; two round tubes can share a set of fins, called Twin H Finned Tube
 
Single H Finned Tube
The fin is divided into two symmetrical halves, which press the tube wall from both sides, and are welded to the tube wall by resistance welding, leaving a certain gap in the middle; there is only one round tube in the middle, which is called Single H Finned Tube.
 
The heat exchanger composed of H-shaped finned tubes is closely arranged, and the tube bundles are arranged in a row.
 
H Finned Tube Quick Details:
Core tube material:
1. Carbon Steel: A106 / A179 /A192 / A210 etc…
2. Stainless Steel: TP304/304L,TP316/TP316L, TP347 etc…
3. Alloy Steel: P5,T5,P9,T9,T11,T22
Fin Material:
1. Aluminum (Alu.1100, Alu.1060)
2. Copper.
3. Steel
Tube OD: 73 mm max.
Tube Length: 18 meters max.
Fin Thickness: 1.5mm ~3.5mm
Fin Pitch: 10mm Min.
Surface Protection: Both bare ends shall be zinc or aluminum metallized by electrospray arc system coating.
Accessories: Tube support boxes, clamps or spacer boxes (materials: aluminium, zinc and stainless steel).
 
Additional Info
Payment Terms:T/T, LC
Delivery: 15-30 days after payment
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package: Iron frame packing boxes and the desiccants are put into each package for continental transportation as well. or as required
 
The case of H Finned Tube



   

Common Specifications of H Finned Tube

General Descriptions of H-fins	Popular Specifications we make
Tube OD(mm)	25mm to 73mm
Tube Wall thickness(mm)	2.5mm Min.
Tube length(mm)	18000mm Max.
Fin thickness(mm)	1.5mm to 3.5mm
Fin pitch(mm)	10mm Min.

We can customize H Finned Tube according to your drawings
Example:





Manufacturing Process:
H Finned Tube is made by welding square or rectangular H fins to a steel base tube.
 
Quality Control for H Finned Tube
The quality of Square or Rectangualr H finned tubes is assured by hydrostatic or aerodynamic testing, eddy current testing and tensile testing to verify the mechanical bond between the inner tube and outer fins
 
Surface coating
External red oxidized zinc phosphate primer and internal Volatile Corrosion Inhibitor (VCI) in water-soluble tablet form.
 
Delivery conditions
Tube ends are square cut, free of burrs, dry and blown clean inside, varnished on both ends of square or rectangular finned tubes.
 
Features of H Finned Tube
maximum. Operating temperature: 300°C
Atmospheric corrosion resistance: OK
Mechanical resistance: good
The influence of the structure of H Finned Tube on ash accumulation and wear: the gap between the two sheets can use the flow of flue gas and scour the ash accumulation, because the flue gas has a higher flow rate at the gap; the tubes are arranged in a row, and the resistance Small wear and tear; H-shaped fins can effectively utilize the flow space and maintain a large fin area and finning ratio; The thickness of the fins can be arbitrarily selected according to the needs of anti-wear; The fins are parallel and independent of each other, without helix angle effect, thus facilitating ash removal.

Application
H Finned Tube is usually used in Economizers, Heat exchangers, Marine boilers.