Pressure vessels in petrochemical, energy, scientific research and military and other fields are widely used in the import and export of pressure vessels often use large carbon steel flange interface. ○ Ring structure is simple, reliable sealing, is widely used in flange sealing structure. Pressure vessel in the long-term use process, there will inevitably be flange sealing ring aging and failure.
At present, the off-line replacement method is often adopted to solve this problem, that is, stop the production operation, remove the container, and replace the ○ ring. Container disassembly to use large lifting equipment, expensive, long time limit, to the enterprise production caused great economic losses.
Pressure plugging [1] is an advanced equipment maintenance technology, which refers to the sealing operation without stopping and reducing operating pressure and temperature after media leaks in the production system. Sealant is one of the key technologies of pressure plugging technology. It is composed of polymer materials with heat-curing properties and other auxiliary materials in solid form [2]. Analyze and test the flow performance, curing behavior, bonding performance, mechanical properties of several sealants commonly used in vacuum sealing, vacuum sealing grease, low temperature glue, silicone, etc., to get the most suitable sealant with pressure plugging.
Post time: Apr-18-2023