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Stockists And Suppliers Of High Quality
Heat Exchanger/Boiler Tubes To The
Process Industries

Call us on: +44 (0)191 587 1777

Integrally Finned Tubes

intergrally finned tubes tsi image of intergrally finned tubes

Developed as a method of increasing heat transfer performance of fluids whilst minimising the physical size and cost of the heat exchanger

The fin is produced by being rolled from the wall of the tube and is therefore integral with the tube itself. Due to fin rolling the wall thickness beneath the finned section is reduced compared with the plain ends. The bore of the fin section is slightly reduced.  Most tubular materials can be finned, however hardness of the material usually determines the finning code or fin profile.

Harder materials such as stainless steel, nickel alloys and titanium are usually supplied with a greater fin density (28, 30 or 36 fins / inch).  This shallower fin profile reduces work hardening of the material and helps eliminate the possibilty of fin root cracking.

Softer materials such as carbon steel, copper and copper alloys are usually supplied with a deeper profile giving a lower fin density (16 or 19 fins / inch).

Plain end lengths and any intermediary unfinned sections must be specified.

Finished tubes can be U bent if required. The U bend area can be either finned or plain, to meet the required specification.

Manufacturing Limitations
1. Carbon and low alloy steel
2. Stainless steel: TP304 / TP304L / TP316 / TP316L / TP321 and duplex
3. Copper alloys: Alloy 443 / 687 / 706 / 715 etc
4. Titanium and high nickel alloys
Tube Sizes - outside diameter: 12.7 / 15.8 / 19.05 and 25.4mm
Plain end wall thickness: >= 1.25mm
Length: up to 24,000mm

Surface Area Improvement
Typical surface area improvements by using integral low finned tubes are:
1. 19.05mm OD with 19 fins / inch: 270%
2. 25.4mm OD with 26 fins / inch: 330%
Depending on the fluids within the heat exchanger the thermal performance improvement can range from between 20% to in excess of 100%

Our management system and procedures are accredited to ISO 9001:2008 by QMS International plc. The comprehensive quality assurance accreditations of our production mills ensure that the products supplied are fully in accordance with the highest industry standards.

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A Conversion Chart covering tube wall thickness detail for BWG/SWG Equivalents in inches and millimetres

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  • Heat Exchanger Fabrication/Repair Industry
  • Oil Refineries
  • Petrochemical/Chemical Plants
  • Fertiliser Production Plants
  • Power Generating Stations
  • Steel Production Plant Furnaces and cooling sections
  • Metals Smelting Facilities
  • Gas Separation,Compression and distribution plant
  • Marine Engine cooling repair and maintenance
  • Offshore Production Platforms

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Universal Supply Limited
Unit 32 Orgreave Close
Dore House Industrial Estate
Handsworth, Sheffield
United Kingdom
S13 9NP

Tel: +44 (0)191 587 1777

[email protected]

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