Cleaning method for sterilization line and sterilization line

A cleaning method for a sterilization line, the sterilization line including a conduit through which a product liquid is transferred, the conduit being provided with one or more stages of heating parts that sterilize the product liquid, and one or more stages of cooling parts that cool the product liquid from the one or more stages of the heating parts in a stepwise manner, wherein the sterilization line includes a plurality of parallel intermediate piping systems in a section thereof from the one or more stages of the heating parts that lies in a temperature range in which the product liquid can be burned to the one or more stages of the cooling parts that lies in a temperature range in which the product liquid can be burned, wherein the section includes at least one of the one or more stages of the heating part that lies in the temperature range in which the product liquid can be burned, and wherein cleaning in place (CIP) of the plurality of parallel intermediate piping systems is performed by switching between the plurality of parallel intermediate piping systems,

• where switching between a flow path of the product liquid and a flow path of a cleaning solution used for the CIP upstream of the plurality of parallel intermediate piping systems and switching between the flow path of the product liquid and the flow path of the cleaning solution used for the CIP downstream of the plurality of parallel intermediate piping systems are achieved by a swing bend.