It is widely used in shipbuilding, oil exploration, loaders, etc. Ship production reached 15,000 tons in 2008, and the deadweight tonnage accounted for 21% of the world market. By 2015, it will become the world's largest shipbuilding country. In order to ensure the normal navigation or mooring of ships and meet the needs of crew and passengers, each ship must be equipped with a certain number of marine pumps that can play a corresponding role. Marine pumps are one of the important auxiliary machines. According to incomplete statistics, among various marine auxiliary machinery and equipment, the total number of marine pumps of various types and purposes accounts for about 20%-30% of the total marine machinery and equipment. The price of marine pumps is included in the cost of marine equipment. The proportion is also relatively large. In the total construction cost, marine pumps account for about 4%-8% of the cost of ship equipment. Generally, the purchase of marine pumps for a medium-sized ship can reach more than 10 million yuan. When it comes to the key pump market, it is indispensable to say that my country has completed the "West-East Gas Pipeline" project. Pump products are also needed in the "West-East Gas Pipeline" project. At the same time, the country has to build other natural gas pipelines, and a large number of pump products are also needed in these projects.