【Ten Years of Rapid Development in Chemical Engineering Equipment】From 1924 to 2022, China completed the installation of the highest-pressure submarine pipeline designed and constructed independently by the country

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Safety first. Prevention first – let’s praise and encourage the achievements in China’s chemical engineering technology and equipment. **********************【Ten Years of Rapid Development in Chemical Engineering Equipment】A continuously updated summary post is available; feel free to join the discussions at https://bbs.hcbbs.com/thread-3576046-1-1.html (Source: Haichuan Chemical Engineering Forum) ***************** On November 23, 2022, it was reported by CNOOC Tianjin Branch and CNOOC Engineering Corporation that, at the construction site of the Phase I development project for the Bozhong 19-6 condensate gas field, an area with reserves of hundreds of billion cubic meters, the installation of the highest-pressure submarine pipeline designed and installed in China was completed with the placement of the 8-inch submarine pipeline end cap in the sea. This marks an important breakthrough in China’s capabilities for developing high-pressure gas fields at sea, and it is of great significance for ensuring **energy security**. According to Jiang Huayun, chief engineer at the Engineering Construction Center of CNOOC Tianjin Branch, the Bozhong 19-6 project is a high-pressure gas field. To increase the transportation capacity, improve the gas field’s recovery rate, and extend its development lifespan, the project adopts an ultra-high pressure cyclic gas injection development approach. Currently, the operating pressure of submarine pipelines in China generally does not exceed 30 MPa. The Bozhong 19-6 project requires an operating pressure of up to 50 MPa. Moreover, high-pressure gas must be transported from the compression platform to the production platform via submarine pipelines that can be as long as 8.6 kilometers – this is the first time such a scenario has occurred in China, posing severe challenges to engineering design and construction. As the \"major arteries\" for offshore oil and gas transportation as well as gas injection operations, subsea pipelines are regarded as the \"lifelines\" of marine oil and gas production systems. The technologies related to the design, manufacturing, and installation of subsea pipelines are one of the key indicators that reflect the overall level of the offshore oil and gas engineering industry. “The project established a task force led by technical experts to tackle a range of challenges, including the selection and design of materials for ultra-high pressure submarine pipelines, the design of critical structures under complex operating conditions, and the development of efficient welding techniques for high-pressure pipelines with thick walls. This effort enabled full domestic autonomy in all aspects—from materials and design to manufacturing processes—laying a solid foundation for the subsequent development of ultra-high pressure gas fields in China. ”Ju Wenjie, the project manager in charge of the overall construction of the Phase I development project for the Bozhong 19-6 condensate gas field by CNOOC Engineering, said.