Abstract: Except for a small amount of new content added in the part about gas stations in GB 50156—2021 Technical Standard of Fuelling Station revised on the basis of the original standard, most parts of the relevant content in the standard remain the same as the original one, and there are some ambiguities in the practical application. Based on the longterm practice of gas station engineering design, safety and fire protection design review, completion acceptance, safety evaluation review and safety inspection verification, the main reasons for the ambiguities are distinguished. The analysis indicates that the ambiguities are partly due to a small number of defects in the standard, but more likely due to people's misinterpretation. Therefore, it is proposed that the revision of national standards should be widely solicited for opinions to maximize the screening of errors and eliminate ambiguities and further improve the preciseness and authority of national standards. Meanwhile, this can also facilitate the relevant application personnel to achieve comprehensive understanding and correct application of the standards and to avoid misinterpretation and reduce ambiguities.

Key words: gas station, technical standards, safe distance, fire separation distance, ambiguities, differentiate and analyze