The types and the application of the pressure relief valves are introduced in detail according to the current situation that the calculation and selection of the pressure relief valves in the piping system of the floating production storage and offloading (FPSO) vessel depend on the valve manufacturer. The calculation and selection of the pressure relief valves in the piping system of the SBM FPSO vessel are carried out by using the API calculation method. The calculation method optimizes the overpressure mode and the selection of the valve flow area, ensuring the correct selection of the pressure relief valve and the safety of the piping system of FPSO vessel.

A new batch printing program that is easy for designers to use has been designed aiming at the urgent demands of the batch conversion of AutoCAD drawings to PDF files and the inconvenience of the current batch printing program during the ship design. This program can exactly achieve one-click printing to reduce the burden of designers and improve the design efficiency.

With the entry into force of the Ballast Water Management (BWM) Convention, the demand for the ballast management system of large semi-submersible vessels becomes increasingly urgent. It introduces the characteristics of the ballast water system for the large semi-submersible vessels, and the difficulties and solutions for the ballast water treatment for large semi-submersible vessels. By comparing the ballast treatment system for the typical large semi-submersible vessels, it is concluded that the circulation method and the gravity method are reasonable and feasible solutions for the ballast water treatment system of the large semi-submersible vessels. It can provide reference for the ballast water treatment system of the large semi-submersible vessels.