Ship pipelines are used to transport various ship service fluids such as sea and fresh water, lubricants, fuel and other fluids. The normal functioning of the devices on the ship is not possible without a complex network of pipelines, which are therefore very important for every ship. Since ancient times, more developed nations, such as the Greeks and Romans, used fluid transportation, and over time, more modern ship machines and devices were developed and installed, and ships became more and more equipped with ship pipelines. International conventions demanded greater safety at sea, which led to an increase in the complexity of ship's pipelines, and with the development of technology and automation of the pipe industry came improved machines for processing pipes. The main purpose of this final work is to show and clarify the characteristics of ship's pipelines, their division and way of functioning. In addition, the elements of ship's pipelines are also emphasized, which are listed and described in detail, as well as their principle of operation and their importance for pipelines. As the most important results and conclusions of the work, one can point out the fact that ship pipelines are a key part of every ship, and they are responsible for the transport of liquids and gases onboard the ship, including fuel, water, oil, air and other necessary fluids for various ship systems. Each pipeline has its own function, and it depends on what it will be made of, and they are often equipped with valves, pumps and gauges to enable control of flow, pressure and temperature in different segments of the system.