Wrapped fin tubes (L/LL/KL fin tubes)

Wrapped fin tubes (L/LL/KL fin tubes), 4 winding and inlaying fin tube machines, daily productivity 3000 meters

L-type fin tubes are wrapped with aluminum fins on the outside of the light tube, and double L-type fin tubes are wrapped with aluminum fins on the outside of the light tube, forming an LL shape at the root of the light tube. The heat transfer performance and atmospheric corrosion resistance are higher than L-type fin tubes, and can be used in wet air coolers. The fin roots of this type of fin tube overlap each other and have good contact with the tube wall, completely covering the tube wall, which can prevent the atmosphere from contacting and corroding the tube surface, and the use temperature is increased to a certain extent; KL-type fin tubes, during manufacturing, the surface of the light tube is first knurled, and then rolled once on the L root when wrapping, which enhances the corrosion resistance and improves the heat transfer efficiency.

2. Processing size and parameters of bimetallic wrapping tubes (L/LL/KL)

Material name	Specifications	Wall thickness (mm)	Fin spacing (mm)	Fin thickness (mm)	Fin height (mm)
Copper tubes Stainless steel tubes Carbon steel tubes	Ф14	＞1	1.8-3.2	0.3-0.5	7
	Ф16	＞1	1.8-3.2	0.3-0.7	8
	Ф19	＞1	2.3-3.8	0.3-0.7	9
	Ф25	＞1.2	2.3-5	0.3-0.7	10-18
	Ф32	＞1.5	2.5-6	0.3-0.8	14-16