Description

HH type finned tube, also called rectangular finned tube, is a common components for the heat exchanger especially for the economizer. It is to weld two symmetrical steel circular on two pieces of tubes and the shape is much like two letters “H”. Due to this shape, it can offer larger surface area than normal spiral finned tubes. It is similiar with the H type finned tube but with a little difference.  

The advantage of the HH type finned tube:

1. Increase tube outside surface and improve heat transfer efficiency.
2. Reduce the number of tubes arranged for the heat exchanger equipments than bare tube.
3. Reduce the flue gas velocity and reduce the wear rate and prolong the life-span for the equipment
4. HH type fins have the best soot blowing effect due to the formation of straight passages on both sides
5. Can offer larger surface area than spiral finned tubes

HH Type finned tube size:

Base tube OD: 25mm-65mm Tube thickness:2.5mm-5.0mm Fin height: 0.5mm-20mm Fin thickness: 0.5-3.0mm HH fin size: 644, 645, 764, 765, 845, 965, 1025, 1026 and customized according to clients’ requirements Tube material: Carbon Steel, Stainless Steel, Alloy Steel, ND Steel and so on. Fin material: Carbon steel, alloy steel, stainless steel, aluminium, copper  

Application：

Rectangular finned tube is widely used in utility boilers, marine power and the tail of heat exchanger components.  

Surface Coating:

Outside red oxide zinc phosphate primer and inside volatile corrosion inhibitor (VCI) in water soluble tablet form  

Package:

Wooden Package with steel frame  

Delivery Condition:

Tube ends are cut with free burrs, internally dried and air-blown clean, externally coated with varnish   Jinbes has two production lines for the H type finned tube and HH type finned tube. We also have three sets of cutting machines to cut the finned tubes into different length according to customers’ requirements. If you have any futher design requirements, welcome send us your technical drawings, we can provide our solution for your reference and will try our best to support you.