On December 13, China's largest thermal power unit—the Tianjin Beijiang 2×1000 MW ultra-supercritical thermal power plant—marked a major milestone as its high-pressure pipe fittings were successfully completed at Bohai Heavy Industry Pipeline Co., Ltd. This achievement opened the door for domestic production of million-kilowatt ultra-supercritical power plant components, setting a new precedent in the industry.
The Tianjin Beijiang project is currently the world’s largest thermal power unit, and the high-pressure pipe fittings it requires are among the most technically challenging in the industry. Bohai Heavy Industry used premium materials such as A335P92, P22, and 106C, capable of withstanding extreme conditions: up to 39 MPa of pressure and temperatures reaching 610°C. The pipe fittings feature a wall thickness of 167 mm, while the three-way shoulders reach an impressive 201 mm. During testing, the product exceeded expectations by withstanding an experimental pressure of 60 MPa, with all inspection data meeting or exceeding standards. This breakthrough effectively broke the long-standing monopoly held by foreign manufacturers in this critical sector.
According to Liu Shangci, Chairman of Bohai Heavy Industry, the company was originally known as Bozhou Bohai Pipe Fittings Co., Ltd. and rebranded as Bohai Heavy Industry on December 1, 2007. Prior to this development, high-pressure pipe fittings for million-kilowatt units were entirely imported. In order to support the localization of large-scale power equipment, Shanghai Boiler Factory conducted extensive evaluations of domestic manufacturers after taking on the Tianjin 2×1000 MW ultra-supercritical project. After thorough inspections and technical assessments, Bohai Heavy Industry was ultimately selected as the supplier.
Following months of meticulous planning, Bohai Company successfully produced the high-pressure pipe fittings through careful material selection, mold design, and process optimization. The successful completion of this project has drawn widespread attention within the industry, with many power plants and boiler manufacturers sending their technical teams to visit. Notably, Harbin Boiler Factory quickly dispatched specialists in craftsmanship and materials to seek reference data for their own million-kilowatt projects.
With the national electricity market shifting toward larger-scale power generation, the share of large power plants has been steadily increasing. As early as two years ago, Bohai Heavy Industries began preparations for the second phase of its expansion project, focusing on producing high-pressure pipes domestically rather than relying on imports. The project has now been designated as a key initiative in Hebei Province and is gradually entering full-scale production. According to recent reports, Bohai Heavy Industry plans to establish a complete industrial chain for high-pressure pipelines, further strengthening its position in the energy sector.
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