Skip to main content

H-shaped finned tube or square finned tube advantages

H-shaped finned tube or square finned tube advantages:

H-shaped finned tube or square finned tube adopts a new welding process. A number of zigzag structures are used at the welding contact parts of the fins, so that the heating is uniform, the welding surface is uniform, and the surface is smooth. There is no slag inclusion, porosity and weld beading. The welding fusion rate is up to 97%. Due to the uniform heating, the compression plastic deformation generated in the welding process is reduced, the longitudinal residual tensile stress near the weld is reduced and the residual compressive stress borne by the fin far from the weld is greatly reduced, which can significantly reduce the wave deformation of the fin and make the welding quality of H-shaped fin tube meet the requirements of technical conditions.

H Shape Finned Tube Typical Material and Size

H Shape Finned Tube Base Tube Size

φ32*4 φ32*5 φ38*4 φ38*5 φ42*5 φ48*5 φ51*5 φ51*6

H Shape Finned Tube Fin Size

70mmX70mm、75mmX75mm å’Œ95mm X 89mm

H Shape Finned Tube Base Tube Material

Carbon steel, stainless steel, ND steel, alloy steel, etc.

H Shape Finned Tube Base Fin Material

Carbon steel, stainless steel, ND steel, alloy steel, etc.

It can be customized according to the specific requirements of users, and we can also help users design

H-shaped finned tube and square finned tubeTechnical requirements for production of H-shaped finned tube and square finned tube

1. Welding strength and stability of H-shaped finned tube and square finned tube

1.1 Pull off force test: greater than 200MPa or partial tear of steel pipe

1.2 Weld width: greater than fin thickness, i.e. welding rate>99%

1.3 Stability of welding strength: the first piece of each shift shall be welded to meet the requirements of 2.1 or 2.2

1.4 Weld bending resistance test: the fins are bent 20 degrees left and right, bent left and right twice, and the weld is free of cracks

1.5 Hammer test: strike the upper part of the fin parallel to the steel pipe until the fin falls off, and the fin itself shall not break

1.6 If the test fails, the annealing function must be enabled

2. H-shaped finned tube and square finned tube heat affected zone

Measurement with microscope and microhardness tester

The depth of heat affected zone of steel pipe is less than 0.5mm

3. Dimensional accuracy of H-shaped finned tubes and square finned tubes

3.1 Overall length of wing segment - 1mm~+1mm segmental motion accuracy - 0.5mm~+0.5mm

3.2 Spacing - 0.2mm~+0.2mm

3.3 Verticality of fins and steel pipes - 1 °~+1 °

3.4 The flatness of butt welded fins in the same group is - 0.2mm~+0.2mm, except for the height difference caused by the thickness tolerance of fins

3.5 Height difference of butt welded fins in the same group - 0.2mm~+0.2mm

3.6 Tolerance of double pipe center distance - 0.5mm~+0.5mm

3.7 Under the conditions of the same steel pipe material, the same sheet spacing and sheet number, the length change of different finned tubes after welding is consistent

4 Welding speed of H-shaped finned tube and square finned tube

Base tube outer diameter 25~51, fin thickness 2mm, each pair of welding time less than 3s (excluding feeding and unloading material time and annealing time).

Comments

Post a Comment

Popular posts from this blog

What is tube sheet layout?

What is tube sheet layout? A tube sheet is a component used in shell and tube heat exchangers and other types of heat transfer equipment. It is a flat plate with holes drilled in it, through which tubes are inserted and secured. The tube sheet serves as a barrier between the two fluids, allowing heat to be transferred from one to the other. The layout of the tube sheet depends on the design of the heat exchanger, which includes the number of tubes, the size of the tubes, and the spacing between the tubes. The layout is typically determined using computer-aided design (CAD) software, which can optimize the placement of the tubes to achieve the desired heat transfer performance. In general, the tubes are arranged in a triangular or square pattern on the tube sheet. The triangular pattern is often preferred because it provides better support for the tubes and reduces the risk of vibration and damage. The spacing between the tubes is also important, as it affects the flow rate and pressure
Post a Comment
Read more

What is aluminum finned tubes?

What is aluminum finned tubes? Aluminum finned tubes are a type of finned tube air heat exchanger that uses aluminum fins attached to a tube made of a different material, such as copper or steel. The aluminum fins are typically extruded or formed to increase the surface area of the tube, which in turn increases the efficiency of heat transfer. Aluminum finned tubes are commonly used in HVAC systems, as well as in industrial and power plant applications. They are preferred over other types of finned tubes in some applications because they are lightweight, corrosion-resistant, and have good thermal conductivity. Additionally, aluminum is relatively inexpensive compared to other metals commonly used in heat exchangers, such as copper and stainless steel. The specific properties of aluminum finned tubes can vary depending on the alloy used to make the fins. For example, aluminum fins made from alloys such as 6061 and 3003 have good corrosion resistance and thermal conductivity, while those
Post a Comment
Read more

What is the difference between pipe bends and elbows?

Bends and elbows are fittings used to change the direction of a pipe. These two kinds of pipe fittings have a wide range of applications in construction, but in actual use, the performance of pipe bends and elbows is different, and elbows are used much more than pipe bends. What is the difference between pipe bends and elbows? An elbow is a pipe part with a bend, which is a commonly used pipe part. Bends are usually manufactured to specific needs. Compared with the elbow, the elbow is much longer and is a curved pipe, while the elbow is only a part that changes the direction of the pipe. Although both are components that change the direction of the pipeline, there are many differences between these two components. 1. Different manufacturing processes for  pipe bends and elbows In the manufacturing process cold and hot bent pipes can be made of pipe bends, which directly bent by the pipe bending machine, and the  bent pipe  can be manufactured at one time without secondary anti-corrosio
Post a Comment
Read more