The core component of offshore floating mooring and crude oil transportation equipment is the crude oil transportation system, in which the strength of the pipelines at the buoy and 100 m underwater is the main factor to ensure its service life. A dedicated stress analysis software is used to analyze the stress of the crude oil transportation system pipeline at the buoy. Combining the limitations of the buoy structure on pipeline layout, an optimized layout plan is proposed to ensure pipeline strength; for the pipeline at the underwater manifold, by analyzing the load on the underwater manifold and considering the particularity of pipeline layout, a combination of theoretical strength verification formula and stress calculation using software is adopted for the analysis. Based on the theoretical formula, the pipeline thickness is selected, and the pipeline stress analysis method is used to verify the pipeline strength. At the same time, guidance is given to the underwater pipeline layout and optimization of pipe support settings.

Floating production storage and offloading (FPSO) unit is an offshore oil and gas processing unit that integrates the ship hull system, topside oil and gas processing system, mooring system and export system. The system of FPSO is very complex and easy to cause serious accidents in case of oil and gas leakage. The firefighting system is the important subsystem of FPSO ship system and the important guarantee for personnel and production. The fire situation in the fire compartment has been analyzed to configure the reasonable extinguishing methods aiming at the rationality of the firefighting system design and the equipment selection for the internal turret moored FPSO. A calculation method for the firefighting system of the internal turret FPSO is then proposed based on the relevant rules and regulations. It can improve the safety and reliability of the firefighting system design and ensure the safety of the FPSO production and the crew safety. This firefighting system calculation method is critical to the design of the firefighting system and the equipment selection. It can provide reference for the design of the FPSO firefighting system.