What aspect of boiler piping does insulation primarily improve?

Insulation in boiler piping is primarily used to reduce heat loss. When pipes are insulated, it helps maintain the temperature of the water or steam within them, thereby minimizing the amount of energy required to reheat the fluid and reducing overall operating costs. By preventing heat from escaping into the surrounding environment, insulation contributes to improved energy efficiency of the boiler system. Additionally, maintaining the appropriate temperatures within the piping can help ensure optimal performance and prevent potential damage caused by temperature fluctuations.

In contrast, aspects like maintaining structural integrity or visibility are not the primary focus of insulation. Structural integrity pertains more to the mechanical strength and durability of the piping rather than insulation's thermal properties. While visibility might be improved if pipes are not wrapped in insulation, this is not the purpose of insulation. Lastly, insulation does not increase the working pressure of the system; pressure is a function of system design and operational parameters, not insulation.