How does LNG/ethylene precool new pipelines?
Thread Content
For shipping cryogenic goods such as LNG/ethylene, how is pre-cooling carried out when new pipelines are put into use, and how is the cooling rate controlled? I earnestly ask all teachers to provide answers
Pre-cooling with liquid nitrogen is cost-effective, with a cooling rate of no more than 30 degrees
Looking at the plans put forward by the shipping teams, LNG carriers or tank trucks are generally used; first, nitrogen is used for displacement to ensure compliance, followed by NG displacement to achieve the same goal. After that, air cooling of the vaporizer is applied, and finally liquid cooling. The temperature trends on the upper and lower surfaces of the pipelines as well as the displacement of the pipe supports are monitored