applied Fin tube

ISO 9001

Spiro Gills Thermal Products Ltd have attained ISO 9001 to the TUV Nord Standard.

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McElroy Applied Finning Machines

We have two McElroy applied finning machines. We are able to manufacture for supply in addition to our demand for finned tube bundles.

Applied Finned Tube

Applied fin usually consists of a steel or stainless steel tube that is wrapped in a non-ferrous fin material. In most cases this is aluminium but can also be copper or other alloys.
Spiro-Gills Products Ltd is the UK’s premier manufacturer of Finned Tubes for air-cooled heat exchangers. Because good quality cooling water is either too costly or unavailable, such exchangers are relied upon heavily by most process and power generation plants throughout the world.

The heart of the air-cooled heat exchanger is the extended surface – the section where heat is transferred.
This surface is composed of helical high-finned tubes which need to be replaced from time to time due to corrosion, fouling or damage – either to the fins or to the base material.

We supply applied fin tube in using four methods. Their differences are detailed further down the page. We can supply replacement finned tubes to suit your planned shutdowns or for emergency use.

Our McElroy finning machines are recognised as the most efficient and reliable for the manufacture of applied finned tubes.

Using Spiro-Gills to manufacture your finned tubes will guarantee that you receive a high-quality product, delivered on time at a highly-competitive price.

TYPICAL APPLICATIONS

The wide range of uses for helical high-finned tubes includes:

  • Steam condensers
  • Oil coolers
  • Air pre-heaters
  • Product coolers – gas, chemicals, petrochemicals, oil etc
  • Overhead condensers
  • Water coolers

THE TYPES OF FINNED TUBE

We supply four types of applied finned tubes

Grooved Fin (Embedded Fin)

SGG-Fin - Grooved Fin (Embedded Fin)

Application: High-efficiency fin for high operating temperatures Upper limiting temperature: 400°C

Manufacture: A helical groove is formed in base tube displacing of material and fin is wound into the groove under tension, followed by backfilling of the displaced material to lock the fin root into the tube.

Fin materials: Aluminium Base tube materials:
Any readily machinable material

Wrapped Fin

SG-L Fin (Wrapped Fin)

Application: Standard fin for low-temperature application where some degree of tube wall protection is required 

Upper limiting temperature: 120°C

Manufacture: Fin foot is pre-formed into L shape and applied to base tube under tension. The adjacent fins abut one another, giving a degree
of base tube protection for less aggressive environments

Fin materials: Aluminium 

Base tube materials: Any metallic material

Overlapped L Fin

SG-LL Fin (Overlapped L Fin)

Application: Standard fin for low-temperature applications giving increased atmospheric corrosion protection of the base tube.

Upper limiting temperature: 180°C

Manufacture: Fin foot is pre-formed into an LL shape (overlapped LL) and applied to base tube under tension. However, foot is pre-shaped to give overlap of one foot onto another, thereby improving base tube protection and thermal contact area

Fin materials: Aluminium

Base tube materials: Any metallic material

Knurled L Fin

SG-K Fin (Knurled L Fin)

Application: Standard fin for medium-temperature applications, giving increased atmospheric corrosion protection to the outer surface of the base tube

Upper limiting temperature: 250°C

Manufacture: Fin foot is pre-formed into an L shape and applied to base tube under tension. Knurling tools both precede and follow the laying down of the fin foot so that the fin material is locked into the pre-knurled tube. This gives up to 50% greater thermal contact area than standard L fin and also ensures an airtight fin to tube bond, resulting in greater tube protection

Fin materials: Aluminium

Base tube materials: Any metallic material

STANDARD DIMENSIONS OF APPLIED FINNED TUBES

Base tube dia. (mm):

25.4, 31.8, 38.1, 50.5, 50.8

Fin height (mm):

12.7, 15.88

Fin pitch:

236 to 433 fins/metre

CONTACT FORM

If you would like more information on any of the services we offer or have any queries then please do not hesitate to contact us.

CONTACT INFO

Stafford

Spiro-Gills Thermal Products Ltd
St Albans Road
Stafford
ST16 3DR
England

Stoke On Trent

Spiro-Gills Thermal Products Ltd
Garner Street Business Park
Stoke-on-Trent
ST4 7BH
England
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