Cold water and comfort cooling pipes are insulated in order to restrict heat flow from the surrounding environment to the pipes. The primary concern when insulating cold pipes is to prevent warming of the contents of the pipes (to maintain their temperature within the required margins) and also to prevent condensation and freezing.
Heat considerations
If drinking water in cold pipes gets warm, it can give rise to bacterial growth within the water. In order to ensure that the water in cold water pipes stays cold, the pipes must have sufficient thermal insulation to prevent heat from the surrounding environment being transferred to the pipes.
Preventing condensation
Warm air contains moisture that condenses when it meets a cold surface. The surface must be insulated so that the outer surface temperature of the insulation becomes higher than the condensation point temperature of the surrounding air. Over time, condensation can cause damage to the pipes that reduces their service life. Once it has condensed, the water can also start dripping and cause damage and discoloration to ceilings and floors. |
