Before filling with pearlescent sand. Seal all the holes. The flanges inside the cold box are tied with glass fibre tapes and all temperature measuring lines and temperature-sensitive components in the cold box have good performance.
It is strictly forbidden to build permanent scaffolding in the cold box, and it is strictly forbidden to use flammable and explosive materials to make permanent supports in the cold box. And should be completely removed from the cold box all temporary facilities ...
Mar 10, 2022