[Chemical Equipment Powerful Country and Important Equipment] 386-2005 Baosteel, Anshan Iron and Steel, and Wuhan Iron and Steel Co., Ltd. produce the highest steel grade X80 gas pipeline application project in China
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This post was last posted by Yuyu in the Desert on 2022-6-24 07:44 Editor Baosteel's X80 gas pipeline application project, which produces the highest steel grade in China, started construction. At noon on March 26, two spiral seam submerged arc welded steel pipes with a diameter of 1016 mm and a wall thickness of 15.3 mm made of Baosteel's high-strength and high-toughness X80 pipeline steel were successfully connected in Jingxian County, Hebei Province, marking the official start of construction of my country's first X80 gas pipeline application project. The X80 pipeline steel industrial application project is located in Jingxian County, Hebei Province, Section 12 of the West-East Gas Pipeline Jining Branch Line, with a total length of 7.925 kilometers. It is currently the gas transmission pipeline with the highest steel grade among domestic natural gas pipelines. The West-East Gas Pipeline-Jining Branch is the connection pipeline between the Shaanxi-Beijing Second Line and the West-East Gas Pipeline, and is responsible for supplying gas to the areas north of the Yangtze River in Jiangsu Province and Shandong Province. In the X80 gas pipeline application project, the X80 pipeline steel hot-rolled coils developed by Baosteel were successfully used. The physical quality reached the international advanced level. All contract production tasks were completed one month in advance, ensuring that the pipeline laying was carried out as scheduled. It was highly praised by the owners. Compared with the X series pipeline steel used in the past, X80 pipeline steel not only has higher strength and toughness, but also can save 12% of steel compared with X70 pipeline steel when the diameter, pressure and output remain unchanged. At present, X80 pipeline steel is only available in Europe and the United States. * * used in some projects. Baosteel began pre-research on X80 pipeline steel in 1999 and entered industrial trial production in 2001. Last year, it passed the inspections of domestic authoritative testing departments and passed the inspections of China National Petroleum Corporation and China Iron and Steel Industry Association. The X80 pipeline steel product identification jointly organized by the Association and equipped with mass production capabilities not only achieved another leap in China's pipeline steel manufacturing technology, but also laid the foundation for the construction of my country's first X80 pipeline test section. Leaders, experts and engineering technicians from the China Iron and Steel Industry Association, China National Petroleum Corporation, Baosteel, Wuhan Iron and Steel, Anshan Iron and Steel and other units participated in the opening ceremony of the X80 pipeline steel industrial application project of the West-East Gas Pipeline Jining Branch Line. At the opening ceremony, industry authorities pointed out that with the development of my country's natural gas industry, the construction of long-distance gas pipelines will enter a period of rapid development in the next few years, and high-grade pipeline steel has broad application prospects. Currently, Baosteel is stepping up the research and development of higher-grade pipeline steels such as X100 to make further contributions to promoting the development of high-pressure, large-diameter, and long-distance gas transmission pipelines in my country.
In 2005, PetroChina joined forces with Baosteel, Wuhan Iron and Steel and Anshan Iron and Steel to build an X80 grade pipeline steel test section. The X80 grade pipeline steel test section project jointly built by China National Petroleum Corporation, Baosteel, Wuhan Iron and Steel and Anshan Iron and Steel was successfully welded in Jing County, Dezhou, Shandong. The test section has a designed transmission pressure of 10 MPa, a length of 7.9 kilometers, and a pipe diameter of 1016 mm. Among them, the spiral seam submerged arc welded pipe is 5.6 kilometers long and has a wall thickness of 15.3 mm. ； The straight seam welded pipe is 2.3 kilometers long and has a wall thickness of 18.4 millimeters.
According to the person in charge of PetroChina’s Science and Technology Development Department: X80 grade steel pipe is another advancement in pipeline construction technology after CNPC successfully used X70 grade steel pipe in the "West-East Gas Pipeline" project. X80 grade oil and gas pipelines represent the world's leading development direction of oil and gas pipelines.
According to experts from the China Petroleum Pipeline Bureau: Due to the high strength of X80 grade steel pipes, the wall of the steel pipe can be made thinner and lighter under the same pressure. Compared with the X70 pipeline, which is at the domestic advanced level, the investment cost of pipeline construction using X80 grade steel pipes can be reduced by about 7%.
Due to the high grade of X80 grade pipeline steel and the difficulty of smelting, this steel type has been in the trial production stage since its birth in the 1980s. It was not until 2004 that the first practical X80-grade natural gas pipeline was officially put into operation in the United States. Currently, the total length of X80-grade pipelines in the world is less than 2,000 kilometers.
Relevant sources from the PetroChina Science and Technology Development Department revealed: After the test section is successfully welded, it is necessary to proceed with the acceptance of the test section project, the formulation of industry standards for X80 grade pipelines, and the specification of solder, welding and other processes. It is expected that X80 grade pipelines will be put into use soon and are expected to be used in some major oil and gas pipeline projects in the future.
The welded pipes required for X80 grade pipelines are produced by Baoji Petroleum Steel Pipe Factory, North China Petroleum Steel Pipe Factory and Julong Steel Pipe Company. The required steel plates are also completely provided by domestic steel mills. The three major domestic steel companies all attach great importance to the trial production of X80. For example: In the past, due to the backward equipment of domestic steel mills, they were unable to produce high-standard wide and thick pipeline steel plates. The wide and thick plates required for the large-diameter straight seam welded pipes in the West-East Gas Transmission Project basically relied on imports. After the successful transformation of Angang's wide and heavy plate rolling mill in 2003, the * * gaps in this area. The 1,100 tons of wide and thick plates required for the straight seam welded pipes in this test section are entirely provided by Angang, and the straight seam welded pipes are made by Julong Steel Pipe Company. The steel materials required for spiral welded pipes are also provided by Wuhan Iron and Steel (1,600 tons) and Baosteel (700 tons). Wuhan Iron and Steel's 2250 rolling mill is currently the widest and most advanced hot rolling mill unit in China. This unit will provide more and better pipeline steel for China's oil and gas industry. Baosteel's current 2050 unit has certain deficiencies in rolling high-standard pipeline steel due to technical limitations. However, after Baosteel's new 5-meter wide and heavy plate rolling mill is put into operation, it will not only be able to produce X80 grade wide and heavy plates, but also have the ability to sprint towards X100 or even higher grade pipeline steel.
X80 pipeline steel is known as the "best" among pipeline steels and has extremely high requirements for comprehensive properties such as strength and toughness. So far, there are only more than 1,000 kilometers of X80 pipelines in the world. Baosteel began pre-research on X80 pipeline steel as early as 1999, and in 2001 entered into industrial trial production research on high-strength, high-toughness X80 pipeline steel hot-rolled coils. Based on years of accumulated experience in the development of X series pipeline steel, especially acicular ferrite type X70 pipeline steel, Baosteel Co., Ltd. has successively carried out multiple rounds of industrial trial production of X80 pipeline steel in various specifications. In 2002, the X80 hot-rolled coils trial-produced by Baosteel Co., Ltd. were made into the first X80 spiral welded pipe in China. All performance indicators of the coils and welded pipes met the American Petroleum Institute API standards and user requirements. In October this year, Baosteel's trial-produced X80 hot-rolled coils successfully passed the inspection of the Xi'an Pipe Quality Supervision Center, an authoritative domestic testing department, and complied with the technical conditions for hot-rolled coils for X80 pipeline steel application projects promulgated by China National Petroleum Corporation. It also passed the X80 pipeline steel product identification jointly conducted by China National Petroleum Corporation and the China Iron and Steel Industry Association. The X80 pipeline steel hot-rolled coils produced by Baosteel Co., Ltd. are currently the highest standard and thickest difficult variety among the international pipeline steel series. They will be used in my country’s West-East Gas Pipeline Jining Connection Line Gas Transmission Project. This is also the first time that X80 pipeline steel has been used in my country’s pipeline construction. It is planned to be rolled and sent to the pipe factory at the end of this month.
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