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Helically Wound Finned Tubing

MATERIALS (we are not limited to these
materials, but they are the most common):

Tube
• Copper
• 443 Admiralty Brass
• 90/10 Cupro Nickel
• 70/30 Cupro Nickel
• Stainless Steel (All Types)
• Carbon Steel
• Aluminum

Fin
• Aluminum
• Copper
• Low Carbon Steel
• Stainless Steel (All Types)

SIZE RANGES:

• Tube and pipe diameters up to 6" IPS.
• Fin height up to 65% of the tube diameter and higher depending on the materials.
• Up to 20 fins/Inch

Fin-to-Tube Attachment Methods

Mechanical

EDGE WOUND
• Recommended in low temperature, moderate duty applications. The fin is wound tightly on edge on the outside of the tube.

SHOULDER TENSION
• Also called "L" Footed or Wrap-on fin. An efficient, cost effective method offering maximum heat transfer at low temperatures.

EMBEDDED
• Offers excellent thermal efficiency at high temperatures. Withstands vibration and shock caused by heat cycles.

Metallurgical

SOLDERED
• Edge wound prior to the soldering process to assure maximum fin-to-tube contact. Unity Tube soldered finned tubes are coated by applied solder coating methods and available with LeadFree solder. Suitable for bending and coiling and for more severe applications.

BRAZED
• For severe and high temperature applications, brazing creates a permanent fin-to-tube bond. Allows for improved heat transfer efficiency through the use of dissimilar metals.

Finned to Tube Attachment Temperature Chart