Behind the Scenes of Office Chair Explosions
The primary cause of office chair explosions is quality issues with the gas pressure rods, including inferior materials, substandard gas composition, and structural defects.
The gas pressure rod is the core component that controls the height adjustment of an office chair. Legitimate products are filled with high-purity nitrogen and use sturdy metal materials for the cylinder walls, capable of withstanding over a ton of weight. However, some manufacturers, aiming to reduce costs, use inferior metal materials to produce gas pressure rods, resulting in overly thin walls that cannot withstand normal pressure. Additionally, these manufacturers may replace high-purity nitrogen with ordinary compressed air. The oxygen in the air gradually corrodes internal components, accelerating the aging of the gas pressure rod and posing safety risks. In extreme cases, such as frequent height adjustments leading to a sudden temperature increase or prolonged high-pressure conditions, the gas pressure rod may suddenly fail or even explode.
According to data from the State Administration for Market Regulation, in 2020, the failure rate of office chairs reached 23.3%, with 17 batches being swivel chairs. The main issues were related to the substandard high- and low-temperature resistance of the gas springs and the lack of explosion-proof steel plates. The role of explosion-proof steel plates is to block debris from flying out in the event of a gas pressure rod explosion. However, some products do not have this component installed due to design flaws or cost-cutting measures, resulting in direct injury from debris during explosions. Furthermore, overly thin walls of the gas springs, insufficient purity of inert gases or their replacement with compressed air, and sudden temperature increases due to frequent height adjustments are also significant causes of explosions.
Several office chair explosion incidents have occurred in history, with severe consequences. For example, in 2013, a Ms. Liu in Xiamen was sitting on a็ฝ่ดญ (online-purchased) swivel chair when it suddenly exploded, sending a 3-centimeter-thick steel rod through her body from below, with fragments piercing her uterus. In 2009, a 14-year-old boy in Jiaozhou, Shandong, died after adjusting a gas pressure chair, causing a rod to pierce his body. In 2017, an office chair explosion in Anhui resulted in damage to a computer case. These cases demonstrate that office chair explosions can not only cause personal injuries but also result in property damage.
