Spiral Fin Construction

Spiral fin construction is a specialized technique used in the manufacturing of finned tubes for efficient heat transfer in various industrial applications.

Spiral Fin coils are used for heating, cooling and dehumidifying. In addition to water, a variety of other heating and cooling media, such as glycol and brine solutions, thermal oils, and refrigerants for DX applications, can be used.

Water coil

Water coil

Nuclear coil

Nuclear coil

Fin tube

Standard Fin Designs

Fins are tension wound on individual tubes to minimise thermal contact resistance and air friction. The tapered fin design provides maximum fin-to-tube contact for optimum heat transfer. Individually finned tubes allow the tubes to move freely, eliminating stress on the tube and fin-to-tube bond caused by thermal cycling. Material thicknesses on the fins can range from 0.010" to 0.030" depending on the material used.

Edgewound Solder Coated

Edgewound Solder Coated

  • Aluminum
  • Tin-coated copper
  • Tin-coated stainless steel
Copper L-foot

Footed "L" Fins(also avalible as an overlapped option)

  • Aluminum
  • Copper
  • Steel
Welded fin

Welded fin

  • Aluminum
  • Carbon steel
  • Stainless Steel
Embedded fins

Embedded fins(for high temperature or extremely corrosive applications)

  • Aluminum
  • Copper
  • Steel
  • Stainless steel
  • 1" OD tubes only
Extruded fins

Extruded fins

  • Aluminum
  • Copper

Tubes

All coils feature 5/8″ OD or 1″ OD seamless copper tubes conforming to ASTM specifications. Standard 5/8″ OD tube wall thickness is 0.020” and standard 1″ OD tube wall thickness is 0.035”. Heavier wall tubing is available up to 0.065” for 5/8” tubing and 0.134” for 1” tubing depending on the material being used. Copper-nickel, aluminum, stainless steel, and carbon steel are available material options.

Tube Joints

All copper based tubes are brazed with certain applications such steam heating coils using silver braze. Other tube materials, such as stainless or carbon steel will require welded joints. Coils featuring removable or box style headers will feature roller-expanded tube joints. Aerofin brazers and welders are ASME qualified.

Casings

Coil casings are heavy gauge galvanized steel for high strength and durability, and as a standard are double flanged for coil stacking. Stainless steel, aluminum, and other casing materials are available material options. Special configurations such as welded casings for airtight applications are available.

Testing

Our factory standard coil test is performed with 300 psig air under water; however, some types of coils may require different testing parameters. Coils with removable headers will be tested hydrostatically to 150 psig. Higher design and test pressures are available for special applications.

【H】 Ceramic lined pipe

Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.

【H】 Cast basalt lined steel pipe

Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.

【H】 Ceramic Tile Lined Pipes

Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.

【H】 Rare earth alloy wear-resistant pipe

The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.

【H】 Tubes Erosion Shields

Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.

【H】 ASTM A213 T91 Alloy Tube

The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.