Office Chair Explosion

The term 'office chair explosion' mainly refers to the sudden explosion phenomenon of pneumatic lift office chairs caused by component defects, with the core hazard lying in the pneumatic rod.

Causes of Explosion

• Improper Gas Filling: High-purity inert nitrogen gas is filled in standard pneumatic rods, which can withstand a pressure of up to 2000 pounds, ensuring high safety. However, inferior products often use compressed air instead of nitrogen. The oxygen in the air can corrode the metal inner wall, causing the tube wall to thin and the internal pressure to continuously rise, ultimately potentially leading to an explosion.
• Thin Tube Wall: If the wall thickness of the pneumatic rod is insufficient, it cannot withstand normal pressure and is prone to rupture during frequent use or pressure changes.
• Lack of Explosion-Proof Steel Plate: An explosion-proof steel plate can prevent components such as steel rods from directly impacting the human body in the event of a pneumatic rod explosion. If not installed, the steel rod may directly penetrate the human body during an explosion, causing severe injuries.
• Frequent Lifting Leading to Sudden Temperature Increase: Frequent adjustment of the pneumatic rod can cause the internal gas temperature to rise and the pressure to increase, thereby increasing the risk of explosion.

Hazards of Accidents

Such explosion accidents are extremely destructive. For example, in 2013, when Ms. Liu was sitting on an online-purchased lift swivel chair to blow-dry her hair, the pneumatic rod suddenly exploded, and a steel rod with a diameter of 3 centimeters penetrated her body, with more than ten metal fragments extracted from her abdomen and intestines. In 2009, a 14-year-old boy in Jiaozhou, Shandong, died after a top rod pierced his body while adjusting a pneumatic chair. According to statistics, more than forty similar tragedies have occurred in China over the past decade.

Preventive Measures

• Purchase Genuine Products: Choose products manufactured by reputable manufacturers, preferably priced above 200 yuan, and ensure that the pneumatic rod has formal certifications such as SGS and TUV international certifications.
• Inspect Pneumatic Rod Quality: Test the smoothness of the pneumatic rod's lifting and lowering to ensure there is no stuttering or abnormal noise. At the same time, check whether an explosion-proof steel plate with a thickness of ≥2 millimeters is installed between the seat cushion and the pneumatic rod.
• Use Correctly: Avoid violent operations such as sitting or standing abruptly or frequently adjusting the pneumatic rod; do not disassemble the pneumatic rod without authorization to avoid damaging its internal structure or causing hazards.