Inner Grooved Low Finned Tubes​
Inner Grooved Low Finned Tubes​also known as steam finned tubes, inner finned tubes, low Inner Grooved Low Finned Tubes​are ordinary heat exchange tubes that are rolled to form threads on their inner surface, and the fins are removed from the bare tube by rolling rolls The outer wall rolls out. A high-efficiency heat exchange tube type with tubes and fins in the same tube.
 
Inner Grooved Low Finned Tubes​ are usually made of copper and are always made with vertical rods for easier installation.
 
The strengthening effect of this Inner Grooved Low Finned Tubes is outside the tube. The strengthening effect on the medium is reflected in the fact that the threaded fins increase the heat exchange area on the one hand; on the other hand, when the shell-side medium flows through the surface of the threaded pipe, the surface threaded fins have a dividing effect on the laminar flow edge layer and thin the boundary. layer thickness. Moreover, the turbulence formed on the surface is also stronger than that of the light pipe, which further reduces the thickness of the boundary layer. As a result of the combined effect, the tube type has a high heat transfer capacity. When this tube type is used for evaporation, it can increase the number of bubbles formed on the unit surface and improve the boiling heat transfer capacity; when it is 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, thermal resistance is reduced, and condensation heat transfer efficiency is improved.
 
 
Inner Grooved Low Finned Tubes​ Quick Details:
Standard: ys/t440, gb/t 19447 or equivalent ASTM B359 ASME SB359;
Material: red Cooper T2/TP2, Cooper magnesium iron alloy BFe 10-1-1, miscellaneous brass Hsn 701, HA177-2, etc.
Outer diameter (OD): 7-16mm
Tube length: up to 16000mm
Fin height: 1.2mm ~2.77mm
Fin thickness: about 0.3mm
Rotation angle: 0-28°
Fin pitch: 30 FPI/28 FPI/26 FPI/36 FPI/43 FPI
 
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

 

 
Manufacturing Process:
Inner Grooved Low Finned Tubes​ are ordinary heat exchange tubes that are rolled to form threads on the inner surface, and the fins are rolled out from the outer wall of the plain tube through rollers. A high-efficiency heat exchange tube type with tubes and fins in the same tube.
 
Delivery conditions:
The tube ends are square cut, free of burrs, dry and blown clean on the inside and varnished on the outside.
Put desiccant in each package for continental shipping.
 
Quality Test:
The integral low fin tube quality is assured by hydrostatic or pneumatic tests, eddy current tests & MARCO tests in order to verify design specifications.

Acceptance ceritia:
WOLVERINE / HPT / GEWA-K & GEWA-KS
 
 
Features of Inner Grooved Low Finned Tubes​
⑴ low processing cost;
⑵ wide application. It has a strengthening effect on the evaporation, condensation, gaseous heat transfer and liquid heat transfer of the shell-side medium;
3. The inner surface area is 1.5-2 times that of ordinary pipes, and the thermal conductivity is 1.5-2.4 times that of ordinary pipes of the same size. The flow resistance is only increased by 3%-5%, saving 20%-35% of energy, reducing
Air conditioner weight 10%-25%.
 
 
Packaging: Iron frame packing box