This standard specifies the principles and methods for the safety assessment of ship gantry cranes. The assessment principles consider the entire ship gantry crane as the safety assessment object. The safety state level of the whole machine is determined by two components: the safety state level of important structural components, which determine the service life of the entire machine, and the safety state level of key components, which are related to local safety. The safety state level of important structural components is related to the overall safety of the gantry crane, while the safety state level of key components is related to local safety. Based on clarifying the relationship between the safety state level of the whole machine and the safety state level of important structural components and key components, the safety assessment principles are divided into whole machine assessment principles, important structural component assessment principles, and key component assessment principles, and are explained accordingly.

The assessment methods are borrowed from GB/T 41510-2022 "Crane Machinery Safety Assessment Specification General Requirements" and are divided into current state assessment, predictive assessment, and comprehensive assessment. The assessment methods involve checking the historical performance of the crane, inspecting and testing the current state of the crane, conducting further analysis based on condition monitoring, and assessing the overall safety of the crane while predicting the impact of future use on safe operations. This standard adopts a comprehensive assessment approach, which combines the assessment conclusions of the crane to determine the safety state level of the entire machine.

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