Ship pipeline is the pipeline used to connect various mechanical equipment on the ship, which is used to transmit water, oil, gas and other related working fluids. There are two kinds of ship pipeline: power pipeline and ship system pipeline. Power pipeline is used for various pipelines serving the main engine and auxiliary engine, including fuel oil, lubricating oil, cooling water, compressed air, exhaust, waste heat and other pipelines. The ship system pipeline is to improve the anti sinking and stability of the ship, and to meet the normal life needs of the crew and passengers. There are many ship systems, including water supply system for sea water and fresh water supply for the whole ship; ballast water system for regulating ship ballast; bilge water discharge system for removing bilge water; compressed air system for providing compressed air for the whole ship; fire fighting system for fire fighting, etc. Most of the equipment used in these systems, such as pumps and compressors, are electric and can be controlled automatically.