Roxul Industrial Insulation Process - Manual (Page 67)

Protrusions within tank walls
Protrusions within the tank wall insulation may
lead to leakage of rainwater or pollution with
chemical substances. Keep the number of
protrusions to a minimum. Insulate any remaining
protrusions as indicated below.
Finishing of tank tops
Similar to tank wall insulation, many
constructions are possible for tank top insulation.
The appropriate system greatly depends on the
tank diameter and the nature of the seam with
the tank wall. In addition, the plant owner may
have specific requirements. The insulation is
generally cladded with aluminum sheeting,
“rivetted” or in radial segments. As tank tops may
be vulnerable to delamination, screws may be
damaged (pulled loose).
If welding the top is not possible, the steel radial
segments in the centre of the top can be hooked
together in a ring around the perimeter of the
roof. Turnbuckles are used to keep the radials
correctly tensioned.
In many cases, the most critical aspect of tank
insulation is preventing the leakage of rainwater
inside the insulation. Water accumulation can
cause corrosion resulting in severe corrosion of
the tank. Correct precautions are necessary to
ensure the quality and life-time of the insulation.
1.5 Insulation of storage tanks
3
1. Finishing with aluminum cladding - 2. Finishing with
steel radial segments - 3. ProRox
® insulation
64