Regulations for liquefied natural gas (LNG) powered ships, dual-fuel ships, and other LNG vessels require the enclosed space liquid lines and gas lines to be a double wall piping system. LNG is stored as a cryogenic liquid, which requires using appropriate materials and safety precautions to contain and handle the fluid in piping systems and storage tanks. LNG piping systems are insulated to protect personnel and to maintain the temperature of the fluid (minimize heat gain and boil-off) and good design and testing of the piping systems will help to mitigate the risk of a leak from the pipe.