Where are flanges applied?

The application of flanges plays an important role in many aspects, including various sectors of the national economy such as the petrochemical industry, energy industry, scientific research and military industry. However, in the reactor of the refinery, the production environment of the flange is very harsh, and the performance of the flange must be excellent because there are feed ports and discharge ports with pressure sensors and temperature sensors in the reactor.

Such as the flange interface, the container is prone to defects such as damage, scratches, and cracks on the flange sealing surface during use, which will affect the sealing of the flange. Here I would like to share with you the preventive measures that flange should take in response to this situation.

There are mainly three methods to deal with it.

First, increase the tightening torque value of flange bolts. This method is suitable for flange sealing surfaces with relatively slight corrosion and scratches. Second, the use of grinding rings for manual on-site grinding repairs is used for local surfacing of small areas of sealing surfaces. Third, the offline repair is usually used when the crack or defect is serious and the sealing surface must be processed, and it cannot be repaired online or cannot meet the requirements.

That is to disassemble the container, transport it to the manufacturing plant, first remove the cracks, repair welding, heat treatment, and then process it on a large-scale numerical control device. The dismantling and transportation of the container require large cranes and transportation equipment, which is expensive and has a long construction period, which causes great economic losses to petrochemical enterprises.

In addition, due to the inconvenience and disadvantages of the on-site processing and repair of the container flange, it is very necessary to design a process for directly repairing and re-processing the flange on-site. Guarantee the real-time repair and improvement of the flange.