Low fin tubes are mainly used in condensers and evaporators in air conditioning and refrigeration equipment, absorption refrigerators, oil coolers and other various heat exchangers; used in condensers and heat exchangers in thermal power plants and nuclear power plants. Evaporators, condensers and evaporators in marine exchangers; air coolers, diesel coolers, secondary coolers and various heat exchangers in waste heat recovery systems used in gas turbine units and the petroleum industry, used in the chemical industry of dryers and heaters.
Low-fin tubes are formed by rolling continuous spiral fins onto plain tubes. Compared with light pipes, it has a larger surface area and higher heat transfer performance, so it is widely used in various heat exchange and conduction situations.

Low threaded finned tubes for condensers and evaporators

Implementation standards: GB/T19447 or equivalent to ASTM B359, ASME SB 359
Material: red copper T2/TP2, iron-nickel copper BFe10-1-1, complex brass HSn70-1, HA177-2, etc.
Status: Wing fragment Y2 or M
Specification range:
Optical end outer diameter Do: Φ7~Φ16mm
Optical end thickness To: 0.40-1.50mm
Bottom wall thickness Tw: 0.25-1.10mm
Tooth height Rh: ≤0.15-3mm
Helix angle β: 0°~ 28°
Total length L: ≤8m

Low threaded finned tubes for condensers and evaporators in air conditioning and refrigeration

Low-thread fin tube is a high-efficiency heat exchange tube type in which ordinary heat exchange tubes are rolled to form threaded fins on the outer surface. The strengthening effect of this tube type is on the outside of the tube.
On the one hand, the strengthening effect of low-thread fin tubes on the medium is reflected in the increased heat exchange area of the threaded fins; on the other hand, when the shell-side medium flows through the surface of the threaded tube, the surface threaded fins have a dividing effect on the laminar flow edge layer. , reducing the thickness of the boundary layer. Moreover, the turbulence formed on the surface is also stronger than that of the light pipe, further reducing the thickness of the boundary layer. As a result of the comprehensive effect, this tube type has high heat transfer capacity. When this type of tube is used for evaporation, it can increase the number of bubbles formed on the unit surface and improve the boiling heat transfer capacity; when used for condensation, the threaded fins are very conducive to the dripping of the condensate at the lower end of the tube, reducing the liquid film. Thin, the thermal resistance is reduced and the condensation heat transfer efficiency is improved.

Low threaded finned tubes for condensers

Features of low thread fin tube:
⑴The processing cost is low;
⑵Wide application.
It has a strengthening effect on the evaporation, condensation, gaseous heat transfer, and liquid heat transfer of the shell side medium.