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Shanghai Expo 2010 - Hamon Day


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HAMON D’HONDT produces a wide range of FINNED TUBES (with aluminium fins) for the following industrial sectors:
  • Refineries, chemical and petrochemical plants
  • Compression gas stations
  • Steel plants
  • Compressor coolers

Hamon D’Hondt is fully equipped to test the contact between tubes and fins ensuring the expected thermal performances (pull & push tests,...)

There are three types of aluminium finned tubes :

 

Aluminium Extruded type

 

MANUFACTURING PROCESS

  • An aluminium muff is shrunk onto a bare tube which is first carefully degreased
  • The assembly is passed through the machine by means of a set of rotating disks
  • The compression of the disks around the aluminium tube results in the extrusion of the aluminium around the base tube, thus causing the formation of the fins
  • The pre-stressing of the aluminium tube means that the fins are held perfectly around the base tube

 ADVANTAGES OF THE EXTRUDED FINNING PROCESS

  • Tube protected against corrosion
  • Fins have extra rigidity
  • Constant heat transfer
  • May be used at temperatures up to 300°C (572°F)

 

Aluminium Embedded “G” type

 

MANUFACTURING PROCESS

  • A groove is cut in the bare tube by metal lifting
  • The strip is embedded under tension into the groove and pressure is applied to the lifted metal to fix the fin
  • This manufacturing process ensures that the fin is fixed tightly to the tube, providing optimum heat transfer

ADVANTAGES OF "G" FINS

  • Provides a perfect fit between the fin and the tube
  • May be used at temperatures up to 400°C (752°F)

 

Aluminium KLM type

 

KLM finned tubes are HAMON D’HONDT proprietary development.

MANUFACTURING PROCESS

  • The fins are composed of an aluminium or copper strip tightly wound around the tube
  • The bases of the fins form a perfect seal, thus offering total protection to the underlying tube
  • The tube and base of the fins are knurled together simultaneously, thus guaranteeing a perfect fit between the fin and the tube to provide optimum heat exchange

ADVANTAGES OF THE KLM FIN SYSTEM 

  • Tube protected against corrosion
  • Resistant to vibrations
  • May be used at temperature up to 320°C (608°F)
  • Unique combination of high thermal performance and stresses resistance with atmospheric corrosion protection
  • KLM can favourably replace any type of finned tubes