Where does this insulation problem lie? How to carry out the rectification?

Looking at this diagram, it seems that the insulation at the connection between the pipeline and the upper flange isn’t properly sealed, right? Here are a few suggestions for you: First, grind away the rusted areas, apply an anti-rust primer, and then seal those areas properly. Fill any gaps between the protective cover and the upper cylinder to prevent rainwater or other substances from seeping into the insulation layer ； The rust that is currently flowing down also needs to be cleaned away to prevent further spread of corrosion ； After all, since they are pipelines in petrochemical facilities, it is best to follow the construction standards for insulation work in the chemical industry when carrying out insulation repairs. Safety comes first; it is advisable to hire a professional team with the appropriate qualifications to handle such tasks for greater reliability.