When lagging is used on steam pipes, its main function is to?

Lagging on steam pipes primarily serves the function of reducing radiation heat loss. When steam is carried through pipes, it maintains a high temperature, creating significant thermal radiation around the pipes. Lagging, which usually consists of insulating materials, is applied to the exterior of these pipes to minimize heat dissipation into the surrounding environment. This not only enhances energy efficiency by keeping more heat within the system but also helps maintain the steam at an optimal temperature for effective heating or other uses.

Additionally, reducing heat loss can lead to economic advantages, as it can lower heating costs and improve the performance of the heating system overall. Therefore, utilizing lagging effectively ensures that the steam water remains at an appropriate temperature, maximally serving its intended function in the hydronic system while also protecting surrounding materials from excessive heat.