Flange local repair there are three methods

Flange application in many aspects, including petrochemical industry, energy industry, scientific research and military industry and other sectors of the national economy have played a very important role. However in the reactor in the refinery, flange production environment is very bad, need to the performance of the flange must be good, for there are in the reactor with pressure sensors, temperature sensors of inlet and discharge outlet flange interface, such as containers in use process is easy to appear the flange sealing surface damage, scratches, cracks and other defects, affect the sealing flange. Here to share with you in view of this situation, flange should take preventive measures.

There are three main ways to deal with it:
First, increase the fastening torque value of flange bolts. This method is suitable for the flange sealing surface with slight corrosion and scratches.
Second, the grinding ring is used for manual field grinding repair for local surfacing of small area of sealing surface.
Third, offline repair for cracks or defects serious, must deal with the sealing surface, and online can not be repaired or meet the requirements, usually using this method. That is, disassemble the container, transport it to the manufacturer, first remove cracks, repair welding, heat treatment, and then on the large NUMERICAL control device processing. The disassembly and transportation of containers require large cranes and transportation equipment, which are expensive and cause great economic losses to petrochemical enterprises.