According to CCTV Network Technology Report, in recent years, Guangdong's offshore engineering equipment manufacturing industry has developed rapidly with the help of resource advantages and location advantages. A specialized new enterprise in Zhuhai has achieved a good match of high strength, toughness, high plasticity and fatigue resistance of materials, thereby achieving strong and tough performance of deep-sea steel pipes. Recently, this enterprise has successfully trial-producedThe world's leading 3,500-meter ultra-deep submarine pipeline welded steel pipe sample.
According to reports, 3,500 meters under the sea has an ultra-low temperature of nearly 9°C and a pressure of 350 times the standard atmospheric pressure.Equivalent to a fingernail bearing more than 350 kilograms of pressure.
Unlike on land, the 3,500-meter underwater environment is very harsh. Steel pipes need to be exposed to low temperature, high pressure, and strong corrosion all year round, which places extremely high requirements on the strength and toughness of steel pipes.
In order to adapt to the extreme use environment, Zhujiang Steel Pipe has solved key technical problems such as deep-sea pipeline steel smelting, rolling and plate forming and welding through research on steel pipe forming technology, welding technology and inspection technology.
In addition to breakthroughs in material technology, the process precision requirements for pipe making must also be exact. “Pipes that stretch under the sea are made up of pipes spliced together.Once one section is deformed, it is likely to cause the entire pipeline to crack due to uneven stress.. "
The successful development of the 3,500-meter ultra-deep submarine pipeline has broken several foreign monopoly on special steel pipe clamping technology. This year, Zhujiang Steel Pipe also won a large order for the world's longest heated crude oil pipeline, with a total amount of approximately 2.5 billion yuan.