en.Wedoany.com Reported - Recently, the International Organization for Standardization (ISO) officially released the world's first international standard specifically for measuring the boil-off rate (BOR) of cargo containment systems on liquefied natural gas (LNG) ships, ISO 21154:2026 "Ships and marine technology — Measurement method for boil-off rate (BOR) of cargo containment system on liquefied natural gas carriers." Led by China, this international standard incorporates expertise from specialists in the United States, South Korea, Japan, Norway, and Singapore, marking another significant contribution by China to the high-tech ship LNG sector following the international standard for ultra-low temperature valves.
The boil-off rate is a core indicator for evaluating the thermal insulation performance and operational efficiency of LNG ship cargo containment systems, directly impacting vessel operating costs, cargo transport losses, and greenhouse gas emission levels. For a long time, the lack of a unified global testing standard led to incomparable results, triggering trade disputes and warranty controversies, severely hindering the high-quality development of the LNG industry chain and the efficient integration of global energy transportation.
With the accelerated transformation of the global energy structure and the continuous growth in demand for clean energy worldwide, the number of LNG ship constructions has increased significantly. Establishing a unified, scientific, and authoritative international standard for BOR testing has become an urgent need for the global maritime community. This international standard systematically specifies six core elements of the BOR testing process for LNG ship cargo containment systems: test principles, test conditions, test equipment, test procedures, data collection and processing, and test reports. Among these, the test procedures specify data measured during three phases: loading, voyage, and unloading conditions. Notably, considering the importance of wind speed and voyage distance for the stable state of LNG cargo, the standard stipulates boundary conditions for wind speed and voyage distance regarding test data under voyage conditions, specifies the minimum data volume for short voyages, ensures data validity, enhances the standard's applicability, and is widely applicable to cargo containment systems of LNG carriers, LNG floating storage and regasification units, and LNG bunkering vessels. It can also serve as a reference for boil-off rate testing of fuel containment systems on LNG-fueled ships. The technical content of this standard comprehensively covers current mainstream cargo containment systems, offering broad applicability and foresight.
It is understood that this international standard was led by Hudong-Zhonghua Shipbuilding (Group) Co., Ltd., under China State Shipbuilding Corporation Limited (CSSC), and co-led by the CSSC Institute of Comprehensive Technology and Economics. It was approved for project initiation by the International Organization for Standardization's Technical Committee for Ships and Marine Technology (ISO/TC 8) in 2023. The release of this international standard fully reflects the positive interaction between standards, scientific research, and technological achievement transformation within China's shipbuilding industry in the LNG industry chain, and also demonstrates China's capability and commitment to deeply participating in global maritime governance and improving the international standards system.
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