The operator of a major gravity based offshore LNG re-gasification plant needed to perform maintenance which involved replacement of a pipe section. The maintenance location was by the flare knockout drum, close to where natural gas is cooled to -162°C. Typically, this type of operation is performed using isolation points built into the facility. However, there were no suitable isolation valves near the maintenance point. Integrity requirements ruled out legacy isolation methods leaving a facility shutdown as the most likely pathway to enable the necessary maintenance.