[Ten years of major development in chemical equipment] 974-2020 Anshan Iron and Steel Co., Ltd. is the world’s first high-strain L485M steel plate for deep-sea pipelines
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Chemical equipment has developed greatly in the past ten years. Praise for China's prosperity and strength in the prosperous age. It will be more lively and exciting with everyone's participation. Everyone is welcome to participate in more forum exchanges and discussions. Everyone pays attention to safety and knows how to respond to emergencies. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * As a major form of offshore oil and gas gathering and transportation, deep-sea oil and gas transmission pipelines are an indispensable lifeline for the development and production of offshore oil and gas fields. They are also the safest, most economical, and most environmentally friendly oil and gas transportation method. However, because deep-sea pipelines need to withstand a variety of complex and harsh conditions such as extremely high water pressure and ocean undercurrents, the performance requirements for products are extremely demanding. On December 3, 2020, reporters learned from the Ansteel Group Iron and Steel Research Institute that the high-strain L485M steel plate for deep-sea pipelines with a thickness of 31.8mm, developed by the institute and produced by the 5500 production line of the Bayuquan Medium and Heavy Plate Plant of Anshan Iron and Steel Co., Ltd.'s Medium and Heavy Plate Division, has made its world debut. After the product comes out, it is expected to serve in deep-sea environments with water depths exceeding 2,000 meters, breaking the historical record of my country's submarine pipeline laying with a water depth of 1,542 meters. “L485 high strain pipeline steel plate and JCOE steel pipe manufacturing technology” as * * “It is a key research and development plan topic during the 13th Five-Year Plan, and the research and development results perfectly meet the technical index requirements of deep-sea oil and gas transmission pipelines. The high-strain L485M steel plate was successfully used in the production of deep-sea oil and gas transportation straight seam welded pipes with a large thickness-to-diameter ratio (thickness/pipe diameter 0.0569), and successfully passed the inspection and evaluation by authoritative departments. In terms of size specifications, the thickness of this product reaches 31.8mm, and the thickness-to-diameter ratio of the steel pipe produced exceeds 0.056. Before this, the thickness-to-diameter ratio of high-level longitudinal submerged arc welded pipes at home and abroad rarely exceeded 0.050. In terms of performance indicators, the product has a yield-to-strength ratio of less than 0.80, a uniform elongation of more than 10%, and a strain hardening index of more than 0.11. It also has good strength and toughness, fully meeting the needs of manufacturing deep-sea oil and gas pipelines. At the same time, in terms of mechanism and key technology research, in view of the technical characteristics of deep-sea pipeline steel, Ansteel Group has carried out in-depth systematic research on the physical metallurgical principles of strengthening, toughening and plasticizing of deep-sea high-strain pipeline steel, and has formed a number of key technologies such as strength-plastic-toughening matching design and control, microstructure refinement and precise control of multiple components, deformation penetration and uniform controlled rolling and cooling, and control of the strength and toughness of welded joints under high heat input conditions.
[Ten years of development of chemical equipment] 975-2023 The first domestic JCOE steel pipe with a diameter of 1219 and a length of 18 meters https://bbs.hcbbs.com/thread-4064963-1-1.html (Source: Huahaichuanliu-Haichuan.com)
[Ten years of development of chemical equipment] 976-2023 China’s first long-distance, high-pressure, high-grade spiral hydrogen-doped pipeline steel pipe https://bbs.hcbbs.com/thread-4065215-1-1.html (Source: Huahaichuanliu-Haichuan.com)
In May 2020, relevant personnel from a steel pipe factory in Lianyungang and Sinopec visited Rizhao Steel. They urgently needed 1,000 tons of pipeline steel plates to complete the laying of the last kilometer of the Qingning gas pipeline project, and hoped to complete the delivery within two weeks. This order has high production requirements and tight delivery time, which poses a huge challenge to personnel levels and equipment capabilities. Faced with the urgent order, the Science and Technology Quality Center responded quickly and organized the steel mill, plate factory, production department and Rizhao Marketing Company to discuss the production of L485M pipeline steel orders. Steelmaking plant technicians track the entire smelting process to ensure that the steelmaking process is stable and smooth. The medium-thick plate factory and the technical staff of the Pipeline Vessel Steel Plate Research Institute discussed the L485M pipeline steel rolling process and determined the rolling process design. After two rounds of trial production based on actual conditions, mass production conditions were finally reached, and all parties were organized to start production. Mass rolling production was completed in only 10 days.
Development of high strain L485 steel plate for deep sea pipelines https://bbs.hcbbs.com/thread-4076622-1-1.html (Source: Huahaichuanliu-Haichuan.com)