VESDA
®
Refrigerated Storage Design Guide
Figure 2 – Ceiling mounted VESDA pipes.
Figure 3 – Example of capillary air sampling.
Note: It is recommended that all drilling of penetration points, and the sealing of such points, be
performed by appropriately experienced personnel.
3.3 Sample Pipe Insulation
Where pipe insulation is needed, use a material such as Armaflex or similar. Armaflex insulation
has a temperature range of -40°C (-40°F) to 105°C (221°F), a density of 88 to 105 kg/m
3
and is
very flexible. For a 25 mm (0.98”) internal bore pipe, a single layer of insulation 9 mm (0.35”) thick
is adequate.
3.4 Sealing Sample Pipe Penetrations
Pipe penetrations, through ceiling or wall insulation panels MUST be properly sealed with a solid
(Urethane foam) and/or flexible (mastic) material. To enhance air-tightness, a seal and/or insulation
boot could also be installed at the penetration point as shown below (Figure 4). Consult local Wall
Panel Suppliers for more detailed instructions.
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