LPG (Liquefied Petroleum Gas) fuel pipeline control method

The invention discloses an LPG fuel pipeline control method, and relates to the technical field of LNG power ship pipeline control. Comprising the steps that a water glycol system is started and circulated to a stable state, a low-pressure pump is started, a high-pressure pump is started, a fuel supply system reaches a preparation state, fuel supply of a main engine reaches specified working pressure and temperature, the main engine is loaded to small-load operation, the main engine is loaded to normal operation load, and the main engine is stopped. The engine in the marine main engine can use LPG as fuel, the cost is reduced, meanwhile, the fuel can be automatically heated, pressurized, cooled, decompressed, inerted and subjected to gas-liquid separation operation, surplus overpressure fuel can be refluxed and utilized, through a water glycol system, the LPG fuel can be heated and cooled, and the fuel can be recycled. The temperature of the device can be adjusted by other heat sources and cold sources, the device is automatically controlled to operate through a fuel supply system, the device is matched with a host control system to start and stop, automatic operation is achieved, economic benefits are met, and the application prospect is wide.