Internally Finned Tubes

Internally Finned Tubes Manufacturers & Suppliers

Tube Tech is a premier manufacture and supplier of internally finned tubes, also known as internally enhanced tubes OR Internally Grooved Tubes with plain outer diameter and internal ridges as per the requirement of the Customer for Direct Expansion Shell and Tube Liquid Coolers. Smooth on the outside and grooved on the inside, these internally finned tubes are seamless drawn high-performance tube in copper tube material. The tube structures can be further optimized in terms of performance, pressure drop and/or weight as per the specific requirement of the Customer.

These inner grooved tubes are also known as Dx Tubes Or Evaporator Tubes. The internally enhanced fin tubes manufactured by Tube Tech are designed to provide maximum heat transfer with minimum refrigerant side pressure drop. The inside heat transfer coefficient of these tubes is generally 2 to 3 times greater than coefficient for smooth surface tubes. These internally finned tubes are available in tube materials Copper UNS C 12200 & 90/10 Cupro Nickel UNS C 70600.

Tube Dia Wall Thickness No Of Ridges Helix Angle (0) Ridge Height Inside Surface Area (m2/m
12.7 mm 0.8 mm 50 18 0.25 mm 0.035
12.7 mm 0.8 mm 60 18 0.25 mm 0.037
12.7 mm 0.8 mm 75 18 0.25 mm 0.038
15.9 mm 0.8 mm 50 25 0.25 mm 0.044
15.9 mm 0.8 mm 60 25 0.25 mm 0.046
15.9 mm 0.8 mm 75 25 0.25 mm 0.047
  • Internally Finned tubes with wall thickness and internal ridge density other than mentioned above can be produced on request.
  • Internally Finned tubes are produced in straight length up to 6 Meters. Bigger lengths can be accommodated on request.
  • Internally Finned Tubes are supplied with deburred / smooth ends.
  • All the tubes are hydro tested at desired pressure after finning operation to ensure defect free products.


Direct application (Dx type) Chiillers. Dry-expansion evaporators.