In the urea workshop, each anti freezing device are hung on a yellow card, this is specifically for the urea plant antifreeze device tailored for the identity card".

　　Urea plant of these anti freeze equipment identity, so that all the antifreeze point at a glance. The staff of antifreezing equipment can clear identification, freezing treatment. In the freezing work, urea workshop requirements per shift for each operation and maintenance personnel, equipment of antifreeze identified by careful inspection, carefully recorded, according to open or close the heating valve, discharge accumulated liquid, freezing equipment to prevent clogging. It is strictly prohibited to open and pour the vacuum system connected to the exhaust, to prevent leakage of air.

　　At present, all the equipment of urea plant antifreeze "identity card", "file ID" and workshop equipment maintenance association, clear division of responsibility to the people, the health status of the equipment can be found clearly.