The physical purification technology of COSCO Sea Shield Ballast Water is the subject of the National 863 Science and Technology Support Plan undertaken by COSCO Group during the “Eleventh Five-Year Plan†period. The industrialization of the project was praised and commended by the Ministry of Science and Technology and the Ministry of Communications. The five major national scientific and technological achievements are the first independent research and development and independent intellectual property rights in China, and have obtained the first ballast water physical purification treatment system for ocean-going ships approved by the International Maritime Organization and the competent authorities of China. In 2011, the Ministry of Science and Technology The Ministry of Environmental Protection, the Ministry of Commerce, and the State Administration of Quality Supervision, Inspection and Quarantine have been selected as national key new products.
The 300,000-ton super large oil tanker (VLCC) requires a large amount of processing and fast processing speed for the ballast water management system. In particular, the safety requirements of the equipment are extremely strict, and the anti-sediment effect is very high. The fifth-generation Haidun ballast water management system provided by Weihai COSCO Technology holds the national-level product explosion-proof certificate, which has guaranteed safety performance. It has four types of electric system with automatic frequency conversion function, which can reduce power consumption. Special filter and backwash technology can be applied to all kinds of dirty sewage areas; ballast pump has a large flow rate of up to 6000 cubic meters per hour, and the equipment technology has reached the international leading level, which can meet the installation requirements of large oil tankers and other ships.
Dalian Ocean Shipping is known overseas in the field of tanker safety. COSCO Kawasaki is unique in China's shipbuilding industry. This time, Dalian COSCO and COSCO Kawasaki chose to install and use COSCO Weihai Technology's Haidun ballast water management system on the 300,000-ton VLCC ship, indicating the high trust of the shipowners and shipyards for COSCO Sea Shield. The leaders of COSCO (Group) Corporation, Dalian COSCO and COSCO Shipbuilding attended the signing ceremony.
The cold working methods of steel pipes mainly include cold drawing and cold rolling. The raw materials of cold-rolled steel pipes can be hot-rolled seamless steel pipes or welded pipes. The common characteristics of the cold working method of steel pipes are high dimensional accuracy and good surface roughness. It can produce very thin (up to 0.05~0.01mm) thin-walled tubes and very thin (up to 0.3~0.1 mm in diameter) capillaries.
Seamless Steel Pipe is a kind of pipe with hollow section, which is widely used to transport fluids, such as oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round steel, steel pipe is light in weight when its bending and torsional strength is the same. It is a kind of economic section steel, which is widely used in pipeline engineering.
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