|Tank Insulation for Sodium
Sodium Hydroxide solutions of 50% concentration will freeze at
58 degrees F. The viscosity increases rapidly as the
temperature of the solution falls below 65 degrees F. That
makes is difficult or impossible to pump and use. It is
necessary to store Sodium Hydroxide 50% solutions in a range
between 65 and 85 degrees F. Heat and insulation are
usually key factors in making that happen.
Sodium Hydroxide Storage tanks
insulated. We apply 2" thick closed cell polyurethane foam
insulation with an R value of just over 6. The insulation is
sealed with a white mastic coating. The
mastic coating is a rubbery white paint that stretches as the
tank expands or contracts from heating and cooling.
The entire outside of the double wall
tank has insulation applied to it with the exception of the tank
bottom. Fittings such as flanges, couplings and lifting lugs
are masked to keep them clear.
For Sodium Hydroxide tanks,
insulation is usually added in
heating panels. The heating panels are known as 'heat tracing'.
A digital control panel is part of the heat tracing system.
The Heat Tracing/Insulation
combination for each tank is calculated to keep the Sodium
Hydroxide at a 'maintenance temperature'. We will need to
know the zip code where the tank is to be installed so we can
calculate the heating requirements based on the record low
temperature for that area.