A shaft seal used to prevent the entry of the seawater or loss of oil from a stern tube bearing. A circular rubber ring is held against the rotating shaft by springs and the existing pressure.

In materials science, liquefaction is a process that generates a liquid from a solid or a gas or that generates a non-liquid phase which behaves in accordance with fluid dynamics.

Liquefaction of gases is physical conversion of a gas into a liquid state (condensation).

Built in 1999 by Frisian Shipyard Welgelegen, the Netherlands, the CORAL CARBONIC is the world first vessel designed for the carriage of liquefied CO2.

Natural gas comes from natural sources and is composed of methane, ethane, propane and small amount of butane. It is condensed to about 1/600 of the volume by cooling it to below the -160°C, its boiling point, to produce LNG.

LNG is natural gas that has been converted to liquid form for easier transport and storage.

Liquefied petroleum gases, also referred to as simply propane or butane, are flammable mixtures of hydrocarbon gases.

Liquid petroleum gas, produced during the refining of crude oil or rich/wet natural gas and made up of propane and butane with some propylene and butylene.

A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure.

Liquid biofuels are derived from biological material and can be produced from a variety of carbon sources.

Cargo with a vapour pressure below 2.75 bar absolute at 37.8°C.

see tankers.

Substances, solutions or mixtures, offered for shipment, carried for dumping, incineration or other methods of disposal other than at sea.

The liquid fluoride thorium reactor is a type of molten salt reactor. LFTRs use the thorium fuel cycle with a fluoride-based, molten, liquid salt for fuel.

Liquid fuels are combustible or energy-generating molecules that can be harnessed to create mechanical energy, usually producing kinetic energy.

A liquid metal cooled nuclear reactor, liquid metal fast reactor or LMFR is an advanced type of nuclear reactor where the primary coolant is a liquid metal.

Liquid penetrate inspection (LPI) is a widely applied and low-cost inspection method used to check surface-breaking defects in all non-porous materials.

At present, vessels that transport liquid pitch number only eight on the international market and the vessels have only 9,000-10,000 tonne capacity to transport this key material for aluminium production.

Power plants that utilise a liquid fuel.

Liquid cargo loading and unloading, ballasting and deballasting, ballast water exchange and tank cleaning operations.