【Ten Years of Rapid Development in Chemical Processing Equipment】2618-2025: Closing domestic technology gaps; First domestic development of TDI railway tank containers successful

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Let’s give praise and support to the achievements made in China’s chemical engineering technology and equipment; your participation in discussions is the greatest encouragement. **********************【Ten Years of Progress in Chemical Engineering Equipment】Regular updates and summaries are available – feel free to join the discussions: https://bbs.hcbbs.com/thread-3576046-1-1.html ***************** Filling a domestic technical gap: The first domestic railway tank car for transporting TDI was successfully developed. August 15, 2025 – Recently, CIMC Environment Technology, a subsidiary of CIMC Group, in collaboration with a large domestic chemical company, developed the first domestic railway tank car designed for transporting toluene diisocyanate (TDI) as a hazardous material. This tank car passed both static strength tests and impact tests successfully. This technological innovation is like creating a specialized \"safe cabin\" for TDI, enabling hazardous chemicals to be transported by train safely; it has significantly promoted the shift of hazardous chemical transportation from road to rail in our country. Photo provided by CIMC Group. Toluene diisocyanate (TDI) is a key chemical ingredient used in sofas, mattresses, and car seats; it enables polyurethane foam to possess good support and rebound properties. However, TDI has a \"temperamental\" nature: it reacts violently when exposed to water, alcohols, or strong alkalis, which can lead to explosions or the release of toxic gases; therefore, it must be transported in special \"protection gear\". Currently, China has become the world’s largest TDI production base, but it has long faced transportation challenges. Traditional road and rail barrel freight transportation is costly and risky, severely limiting transportation efficiency. With the advancement of the **Action Plan for Effectively Reducing Logistics Costs across Society**, shifting freight from road to rail has become an important approach for transporting hazardous materials. Railway transportation boasts advantages such as high capacity, strong stability, and low carbon emissions; however, until now, there has been no specialized railway tank container technology for TDI in China. As early as 2023, CIMC Environmental Technology began collaborating with a large domestic chemical company to jointly develop TDI hazardous material tank containers suitable for use on Chinese railways. To ensure the reliability of the tank containers under extreme conditions, the R&D team conducted rigorous tests on July 7, in the presence of various witnesses, in accordance with the relevant standards for the transport of hazardous goods by China’s railways. Static strength test: A 20-foot TDI tank container sample is filled with saline of equal density to simulate the mechanical properties under static load when carrying a 30-ton load, in order to verify performance indicators such as the strength and load-bearing capacity of the container’s components. Impact test: An impact vehicle strikes one end of the tank container at a certain speed to test its impact resistance and assess its ability to withstand the complex loading conditions associated with railway transportation. Test results show that this 20-foot tank container successfully passed the static strength test with a load of 30 tons as well as the impact test at 8 kilometers per hour, with all parameters meeting the requirements of relevant railway standards. Furthermore, taking into account the high reactivity of TDI, the R&D team conducted rigorous pressure and airtightness tests on the tanks to ensure that there is no risk of leakage at all. Compared to traditional road and rail tank transport, this new technology not only significantly improves the safety of TDI transportation but also enables the reuse of tanks, thereby saving over 10 million yuan annually in costs related to steel tank packaging and protection. Furthermore, rail transport has significant environmental advantages over road transport. “For every 100 million tons-kilometer of freight transported by high-speed trains, approximately 7,500 tons of carbon dioxide, 80 tons of nitrogen oxides, and 4 tons of particulate matter are reduced. At present, the relevant parties are accelerating the approval process for railway operation qualifications. Once these tank containers enter commercial operation, they will provide strong impetus for ensuring the safety of China’s chemical industry chain as well as facilitating its transition toward a greener and lower-carbon model.