Yanan petroleum chemical plant by querying over the years in Northern Shaanxi climate statistics and Itou Akiharu weather, the spirit of "not setting a line, not frozen equipment" principle, establish anti coagulation work plan, post production will be anti coagulation in succession, and organize the inspection, to ensure that the anti coagulation measures in place. At present, the factory all winter antifreeze anti coagulation equipment all put on insulation "winter clothes", ensure the safety of the equipment.