zheheng stainless provide ship with stainless steel tube, has through the ABS American bureau of shipping the authentication, KR Korean register of shipping the authentication, RINA RINA authentication, BV bureau veritas certification and DNV det norsk --stainless steel pipe materials used in ship industry
The shipping industry USES 321Ti stainless steel pipe or 18cr-8ni composite plates as cabin materials for ships transporting food, chemicals, cold storage, etc.LNG carriers use cr-ni austenitic stainless steel with good cryogenic performance, with annual usage of over 50,000 tons. Ship kitchen equipment, periscope pipes, masts, power machinery, etc. are all applied to stainless steel pipes, mainly 304 and 316L materials, the annual demand is more than 10,000 tons. According to preliminary calculations, a ship would need 147,000 cubic meters of stainless steel tubes.
Because of its excellent mechanical properties, high machining precision and strong corrosion resistance, stainless steel is irreplaceable in ship materials.Moreover, with the development of stainless steel industry, especially the development of China's stainless steel industry, the trend of stainless steel pipe fittings used in shipbuilding industry becomes more and more obvious. The following is an overview of several environments in which stainless steel is used in shipbuilding.
Tanker transportation of crude oil as an important tool, its function is to transport crude oil by origin place a refining capacity, due to the high viscosity of crude oil and sea temperature is very low, sometimes need to heat the crude oil output in order to facilitate, so for heat exchange tubes according to necessary to calculate the heat transfer area of laying in the bottom of the tank and the walls.Since most of the heat exchange medium in the sea is seawater, the pipe is required to have excellent corrosion resistance and high mechanical and technological performance.
At present, there are about 20 kinds of copper and copper alloys used in ships, and the usage is increasing gradually. The amount of copper and copper alloys used in general military and commercial ships can account for 2-3% of the ship's self-weight. Among them, copper alloy condensers are the most used in China's shipbuilding industry at present, about 60,000 t per year. However, in recent years, with the rapid improvement of stainless steel pipe smelting, manufacturing and processing technology, the copper alloy pipe used in China's shipbuilding industry is being replaced by stainless steel pipe.
