Recently, the large falling film evaporator manufactured by our company has been successfully shipped. The equipment schedule for this project is tight, and the customer has high requirements (after welding the pipe plate and pipe head, the flatness should be less than 2mm). The equipment has a large weight (about 186 tons per unit). The completion personnel have overcome difficulties, developed anti deformation techniques, actively overcome the impact of the epidemic, made every effort to compete for the construction period, and ensured the smooth delivery of equipment.