A1 Flues

Blown flue pipe insulation 

Blown flue pipe insulation is made up of loose, granular material that is either installed by hand or, more commonly, blown into voids using specialist equipment. This is therefore why most people within the commercial flue systems industry refer to it as blown flue pipe insulation.

It is rated as non-combustible in accordance with BS476 Part 4.

This type of flue pipe insulation is specifically designed for use as an insulation that is in-filled around equipment, within voids and in restricted areas. Its ability to be handled makes it very easy to work with at a range of extreme temperatures, from cryogenic applications all the way through to high-temperature applications.

Effective high-temperature use is dependent upon the installed density. It is recommended that handfill be installed to a density of 150kg/m3 or greater for use at temperatures of up to 800°C. The typical installed density is in the range 45 to 200kg/m3. Our Technical Department can advise on installations where temperatures range from 800°C up to 1500°C.

The advantages of blown flue pipe insulation include:

  • It has excellent thermal and acoustic properties
  • It is chemically inert and non-combustible
  • It is non-hygroscopic
  • It has a uniform, granular texture
  • It is very simple to install
  • It eliminates any gaps
  • It is stable and highly versatile
  • It is a reliable and cost-effective solution

For technical help on blown flue pipe insulation, either email our Technical Department at technical@a1flues.co.uk or call 01623 867303.