ISO 21154:2026

This document specifies the principles, conditions, equipment, processes, data acquisition and processing, and test reports of the boil-off-rate (BOR) test for cargo containment systems (CCS) in liquefied natural gas (LNG) ships.
It is applicable to the CCS of LNG carriers, LNG floating storage and regassification units (FSRU) and LNG bunkering vessels. It can be used as reference for the fuel containment system (FCS) of LNG fuel ships.