Specifies the thickness of the insulation.
Piping
If you selected Not Insulated in the Insulation Specification box, you cannot change the value in the Insulation Thickness box. However, if you manually entered the insulation specification, you must provide a corresponding insulation thickness value as per the specification. If you selected an insulation specification from the available list, the software automatically displays the corresponding thickness value as per the specification.
HVAC
If you selected Not Insulated in the Insulation Material box, this property is unavailable.