Hailu Chemical has obtained a patent for a modular feed pipe structure for concentrated sulfuric acid storage tanks, which is simple to construct, install, and maintain
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Hailu Chemical has been granted a patent for a modular feed pipe structure for concentrated sulfuric acid storage tanks, which simplifies construction, installation, and maintenance. According to news from August 2, 2025, **information from the Intellectual Property Office shows that Nanjing Hailu Chemical Technology Co., Ltd. has obtained a patent titled “A Modular Feed Pipe Structure for Concentrated Sulfuric Acid Storage Tanks.” The approval number of this patent is CN223174783U, with the application date being September 2024. The patent abstract indicates that this utility model relates to the technical field of feeding structures for concentrated sulfuric acid storage tanks, and it discloses a modular feeding pipe structure for such tanks. The feeding component consists of a PTFE-lined double-wall pipe, a carbon steel straight pipe, and a carbon steel conical pipe. An outer sleeve is installed on the top side of the concentrated sulfuric acid storage tank body, with a flange at the top of this outer sleeve. The PTFE-lined double-wall pipe passes through the flange, the outer sleeve, and the interior of the storage tank body in sequence. Fixing components are located inside the storage tank body; the carbon steel straight pipe is mounted on these fixing components, while the carbon steel conical pipe is installed on top of the carbon steel straight pipe ； Through a modular design, this utility model makes full use of the strong resistance of PTFE-lined pipes to concentrated sulfuric acid corrosion, as well as the ease with which the metal inner wall of the concentrated sulfuric acid storage tank can be used to support and reinforce carbon steel straight pipes. It also facilitates the maintenance of carbon steel conical pipes and straight pipes inside the storage tank, offering simple construction, installation, and maintenance procedures. According to Tianyancha, Nanjing Hailu Chemical Technology Co., Ltd. was established in 2011 and is located in Nanjing; it is a company that operates in the field of professional technical services. The registered capital of the enterprise is 99 million RMB. According to the big data analysis provided by Tianyancha, Nanjing Hailu Chemical Technology Co., Ltd. has made investments in 3 companies, participated in 137 bidding projects, and holds 61 patent records. In addition, the company possesses 10 administrative licenses.
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