HTS is responsible for the fixed torque fastening of the flange of a petrochemical enterprise in Panjin. During the implementation of the project, there are many defective flanges on the site. HTS has invested many sets of full-scale equipment and personnel to repair the flange end face. The repair flange specifications range from DN150 to DN1400, etc. The flanges include equipment body flanges and pipe flanges, and the flange sealing surfaces are RF and RJ, etc.