The hydrostatic tests in all operation modes were completed for homemade B780CF high strength steel manifold in the Hydraulic Machinery Plant of SINOHYDRO BUREAU 14 CO., LTD. Finally, the tests succeeded with the water pressure of 17.4MPa on May 12, 2012. The leaders and experts concerned from the Electro-Mechanical Installation Branch under SINOHYDRO BUREAU 14 CO., LTD, Zhengzhou Mechanical Design Institute and Zhejiang University, etc. personally went to the site and attended the meeting. Mr. Zheng Quanchun, vice president of Pumped Storage Engineering Design Institute under HYDROCHINA HUADONG, Ms. Chen Lifen, the research responsible person and the related personnel watched partial tests and attended the meeting.

Based on the manifold prototype of Xianju Pumped Storage Project, the test model for steel manifold was designed and fabricated by 1:2.5 normal model. The large-scale tests were completed through concerted efforts of the parties concerned. The steel plates and welding materials were provided by the Baosteel Group Corporation; model fabrication and installation were conducted by the Mechanical and Electrical Installation Branch under SINOHYDRO BUREAU 14 CO., LTD; model welding seam detection and the hydrostaic tests were carried out by Zhengzhou Mechanical Design Institute; model design, stress and deformation calculation and analysis were performed by HYDROCHINA HUADONG and Zhejiang University. 

The tests offered not only agreat deal of valuable data but also theoretical and practical experience for design and application of homemade 800MPa high strength steel manifold, and upgraded HYDROCHINA HUADONG’s technical level in the design field of high-pressure pipeline as well. At the same time, there is important practical significance in both improving the technical economy of the hydropower stations and promoting the progress of China‘s hydropower construction technology. During the test and the meeting, HYDROCHINA HUADONG communicated with the parties concerned and preliminarily reached a consensus at the following aspects: the application of the test results and how to turn them into proprietary technology or patents through HYDROCHINA HUADONG’s platform of Pumped Storage Engineering Center.