As Class III pressure vessels, liquefied gas storage tanks must be designed and manufactured in compliance with the *Safety Technical Supervision Regulation for Stationary Pressure Vessels* (TSG 21-2016). Given the high safety risks associated with Class III pressure vessels, they require stricter management and inspection protocols. In recent years, China has made significant strides in the design and manufacturing of ultra-large storage tanks; for instance, in January 2026, two onshore LPG storage tanks-each with a capacity of 30,000 cubic meters-departed from Qidong, Jiangsu. Historically, safety incidents-such as the 2007 explosion of an LPG storage tank at an oil and gas refueling station on Pusan Road, Shanghai-have been caused by improper design, manufacturing, or maintenance.
Technological Breakthroughs
In the realm of ultra-large storage tanks, manufacturers have overcome numerous technical challenges. For example, the 30,000-cubic-meter onshore LPG tanks destined for export successfully addressed technical issues regarding material resilience, structural stability, and safety under extreme low-temperature conditions; at the time of their production, their individual capacity was among the largest for products of this type.
Manufacturing Processes and Intelligent Development
The design and manufacturing processes for this type of storage tank offer a comprehensive solution for the industry regarding the storage of cryogenic liquid cargo and the large-scale manufacturing of massive energy equipment. Meanwhile, intelligent manufacturing and safety management have emerged as key trends for small- and medium-sized tank gas supply systems. Domestic enterprises have developed intelligent LPG tank gas supply systems that integrate high-precision sensors and IoT technology to monitor pressure, liquid levels, and leakage status in real time. Furthermore, they have established an intelligent control system covering the entire "transport-distribution-storage-utilization" workflow, with the relevant technical equipment demonstrating strong performance across key metrics.
