The maritime industry is steadily transitioning toward cleaner, more efficient energy sources. Natural gas, particularly in the form of LNG (liquefied natural gas), has become a popular alternative to traditional marine fuels due to its lower emissions and cost-effectiveness. As LNG becomes increasingly important in marine propulsion, especially on gas carriers, the technology that enables its use — namely the fuel gas supply system (FGSS system) — plays a critical role.

A dual fuel supply system is an advanced fuel system that enables an engine—commonly a dual fuel engine—to run on two types of fuel. These systems are primarily used in diesel engines modified or built to burn both natural gas and diesel, either simultaneously or independently.

An FPSO solution refers to the deployment of an FPSO vessel—a large, ship-shaped floating unit equipped to produce, store, and offload oil and gas. These vessels are moored at sea over an oil field and are capable of receiving hydrocarbons through subsea pipelines, processing the oil and gas onboard, storing the processed oil, and offloading it to shuttle tankers or transport vessels.

A double wall pipe features two concentric pipes: an inner pipe that carries the material (gas, liquid, or smoke), and an outer pipe that acts as a protective shell. Between them, there may be an air gap, vacuum insulation, or inert gas such as nitrogen to serve as a thermal or pressure barrier. This dual-layer design provides better clearances to combustibles, improved resistance to high temperatures, and enhanced durability compared to single-wall alternatives.