On June 22, Aerospace Materials Company was featured again on CCTV News (CCTV13). According to the report, in the waters off Lingshui, Hainan, with the lowering of the pipeline end termination head, the installation of a key controlling project for the Phase II development of the "Deep Sea No. 1" gas field—a subsea oil and gas transmission pipeline with a diameter of 20 inches and a total length of approximately 115 kilometers—was completed. This marks a significant breakthrough in China's capability for deepwater long-distance subsea pipeline construction and deepwater equipment technology.
Subsea pipelines are the "lifeline" ensuring the stable transportation of offshore oil and gas. The Phase II project of "Deep Sea No. 1" is located in a deepwater high-pressure gas field. The oil and gas extracted from the formation have complex compositions, with high temperatures and pressures, making conventional pipeline materials unsuitable for the production requirements. CNOOC applied a combined solution in the deepwater environment: "114 km of deepwater large-diameter seamless steel pipe + 1.5 km of deepwater bimetallic composite pipe." This is currently the longest subsea export pipeline in Asia, achieving full-process localization in design, R&D, and trial production. Welding deepwater bimetallic composite pipe is extremely challenging, as it is prone to issues like liner detachment from the base pipe due to low bond strength, which could render the entire subsea pipeline unusable. This places extremely stringent demands on the pipe's mechanical properties, dimensional tolerances at pipe ends, and the bond strength between the liner and base pipe.
For this project, Aerospace Materials Company specially customized pipes for "the transportation of mixed high-temperature, high-pressure, highly corrosive oil and gas flows." The pipeline design pressure can reach 38.8 MPa, capable of transporting oil and gas flows at 120°C, with a maximum wall thickness of 38 mm, setting a new record for subsea pipeline wall thickness in China.
Chief Engineer Wu Ze stated in the CCTV interview: "We collaborated with the CNOOC project team to tackle the challenges, applying high-temperature resistant polymer bonding materials used in the aerospace sector to the development of the bimetallic composite pipe. The developed polymer coating significantly enhances the composite pipe's resistance to instability and collapse, with some performance indicators exceeding international standard requirements."
With reliable quality assurance and advanced technological support, Aerospace Materials Company continues to innovate and achieve technological breakthroughs in the application field of bimetallic composite pipes, effectively safeguarding national energy security. It serves industrial civilization with innovative materials science and technology, helping the nation's energy sector scale new heights!
(Partial text and images sourced from CCTV News)
