Even if there is no actual conducted online leak sealing operation, but only with this kind of work, should also know that this aspect of the requirements is very strict, because can cause plugging after completion is still not taken for leaks. A lot of people at the same time also is very clear, do the homework, must be in strict accordance with the requirements of the process steps to do it, and to ensure that the work of each process meet the relevant requirements. If it is for specific operation method is very understanding, but also will know how to seal face should be leak, this kind of problems and specific details on the situation.

　　Specifically do online leak sealing on the sealing surface, is the block valves, leakage of flange sealing surface, generally need drilling method is used as auxiliary measures, this time need gland leakage, the valve when stuffing box wall thickness is more than 10 mm, can be used in the stuffing box outside wall drilling, tapping, or add special card into the sealant. When the stuffing box wall thickness less than 10 mm, need to add special card into the sealant. Then pay attention to the leakage of flange sealing surface, the bolt can't remove, and the system pressure is greater than 2 MPa, can use flange drilling method.

　　If it is to do online leak sealing to seal face, you should be in accordance with the above process steps to do so, and to ensure that meet the relevant requirements in the job.