Since the 1990s, B10 alloy pipe has been widely used as the main material of Marine seawater piping system in China. As China's navy moves towards deep blue, higher technical and tactical requirements are put forward for the flexibility, safety and reliability of ship equipment. Titanium alloy is the best choice for Marine seawater piping system due to its low density, high strength and excellent corrosion resistance.
China began to study the ship titanium alloy in the 1960s, and through many years of research and development, the ship titanium alloy material system has been preliminarily established. Around 2003, the fire-fighting system, main and auxiliary seawater cooling system, air conditioning cooling system and pipes, fittings, flanges and valves of the seawater piping system of a certain type of boat were all made of pure titanium, which was also the first time that titanium was used in the seawater piping system in China.
So far, these materials have achieved good service effect without leakage, corrosion failure and other problems. The tensile strength of the pipes in service has been reinspected, and no performance attenuation has been observed. Domestic production units and research units have also carried out product research on pure titanium, TA24, TA36 and other ship titanium alloy pipes according to the requirements of Marine sea water pipelines, and carried out evaluation and test on the developed products.
In order to fully master the application technology of titanium alloy in Marine sea water pipeline system, domestic ship Overall design Institute, 725 institute and other units have built a number of titanium alloy test platforms to conduct systematic assessment on the application technology of titanium alloy such as material compatibility, sealing pressure, corrosion protection and Marine biological fouling prevention.
Although titanium alloy's corrosion resistance and other advantages make it show good service performance in seawater pipelines, due to the relatively weak industrial foundation in China and the late development of relevant research, the accumulation of relevant data still cannot meet the requirements of system safety and reliability for Marine application. Therefore, the application of titanium alloy in domestic Marine pipeline is still limited to a small range. In recent years, with the development of China's navy construction, the application of titanium alloy in seawater pipeline has been put on the agenda, and its research work has been strengthened constantly.
