【Ten Years of Rapid Development in Chemical Equipment】China’s First High-Pressure Nickel-Based Large-Diameter Top-Installed Ball Valve from 1995 to 2017

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Ten years of rapid development in chemical processing equipment – praise for China’s prosperity and strength. This is just a starting point; more participation will make things even more lively. HaiChuan becomes even better with your involvement; we welcome everyone to join in the forum discussions. Everyone should pay attention to safety and know how to handle emergencies. ********************************************* On March 21, 2017, Shanghai Kaigong Valve Co., Ltd. successfully delivered a batch of high-pressure nickel-based large-diameter top-mounted ball valves to Lukoil Corporation in Russia. Among them, the 36-inch, 600LB high-pressure nickel-based large-diameter top-mounted ball valve is the first of its kind in China. The successful completion of this project indicates that Shanghai Kaigong Valves has significantly improved its capabilities in designing and manufacturing top-mounted ball valves for large sizes, high pressures, and harsh operating conditions, and has also become more proficient in the production processes for valves used in oil and gas transmission under high sulfur content conditions. High-pressure nickel-based large-diameter top-mounted ball valves are used in gas fields with high sulfur content; the operating conditions to which these valves are exposed are severe, requiring that the valve body and sealing materials be capable of preventing sulfide stress cracking (SSC) and hydrogen-induced cracking (HIC). The valve body is made of carbon steel, with an INCONEL 625 layer welded onto its inner surface, and the thickness of this welding layer must be at least 3 mm to ensure that the valve meets the requirements of its operating conditions. Therefore, from the outset of the order placement, Kaigong Valves organized engineering and technical personnel to form a dedicated project team to tackle technical challenges, develop innovative designs, and improve manufacturing processes. By investing heavily in Austrian FRONIUS intelligent wire welding equipment, the company was able to successfully resolve the issues of dilution rate and porosity in the INCONEL 625 weld layers. The design and quality of these valves have received high praise from customers.