1. Description of nitrogen protection nitrogen replacement:

 

 

Nitrogen replacement is medium nitrogen replacement equipment, pipeline, the method of air in inert gas protection of equipment and technology. By the inertia of nitrogen protection, can greatly increase the safety of the equipment operation.

 

This scheme with liquid nitrogen as the medium for nitrogen charging protection pipeline equipment.

 

2. The operation steps:

1) installation of nitrogen sealed official cap and connection device.

2) the scope of the alert, safety protection, equipment inspection.

3) dry wind sweep to reduce dew point - 20 ℃.

4) connect the nitrogen source for nitrogen sealed.

5) export dew point detection, detection 1 min achieves the nitrogen filling stop, micro positive pressure seal.

6) inspection QC,