The decision criteria to go for technical insulation in industrial areas is mainly driven by the economic insulation thickness.
The initial investment costs to mount insulation material combined with the annually reduced heat lost costs which can be reached throughout the lifetime of the plant form the main components. The economic insulation thickness is reflected in the minimum of the sum of investment and heat lost costs.
The graph shows very clearly that the effect of insulation contributes directly to the reduction of energy costs. So it's an effective measurement to increase the energy efficiency in industrial applications.