Nitrogen Purging of Insulation and Inter-Barrier Spaces Exercise
In this exercise, the user is tasked with filling and topping up the insulation and inter-barrier spaces with nitrogen using nitrogen generators on both LNG ships.
Exercise Overview:
- System Preparation:
The exercise begins by outlining the procedures for starting the nitrogen generators, including the air compressor and feed air compressor. Instructions for starting the portable multi-gas detector are also covered. The procedure for operating the valves for insulation spaces and inter-barrier spaces in manual mode is explained in detail.
- Objective:
- The main goal of the exercise is to reduce the oxygen content inside the insulation and inter-barrier spaces, replacing the entire atmosphere with nitrogen.
- Assessment Process:
- Once all system preparations are completed, as outlined in the LNG LCHS exercise instruction manual, the assessment begins with the introduction of nitrogen into the spaces.
- The user must continuously monitor the oxygen levels within the spaces using sampling points.
- Completion:
- The exercise is considered complete when the oxygen content in the spaces is reduced to less than 2%. After all parameters are checked and verified, the user receives a “completion” notification, indicating the successful completion of the exercise.
