Office Chair Explosion

Office chair explosions mainly refer to the sudden explosive phenomena caused by component defects in pneumatic lifting swivel chairs, which mostly occur in low-quality pneumatic rod products, but the overall explosion probability is not high.

Causes of Explosions

1. Pneumatic Rod Issues
   Pneumatic rods should be filled with high-purity inert gases (such as nitrogen). If the gas purity is insufficient, mixed with oxygen or other substances, or in high-temperature environments or under frequent friction, explosions may occur. Some unscrupulous merchants reduce costs by using compressed air instead of inert gases, further increasing the risk. Additionally, if the wall of the pneumatic rod is too thin, it reduces structural strength and increases the probability of explosion.

2. Component Defects
   Explosion-proof steel plates are crucial safety components that can block fragments in the event of a pneumatic rod burst. If the product is not equipped with an explosion-proof steel plate, or if the pneumatic rod's high- and low-temperature resistance does not meet standards (such as material embrittlement under extreme temperatures), accidents may occur.

Typical Cases

• In 2013, Ms. Liu was sitting on a swivel chair blow-drying her hair when the chair suddenly burst, and the pneumatic rod penetrated the seat, causing her severe injuries and unconsciousness, with metal fragments remaining in her intestines.
• In 2009, a 14-year-old boy in Jiaozhou, Shandong, died after a pneumatic rod pierced his body while adjusting his chair.
• In 2017, an office chair explosion in Anhui resulted in damage to a computer case.

Preventive Measures

1. Choose Genuine Products
   Prioritize products from reputable manufacturers priced above 200 yuan that have passed national safety certifications, and avoid purchasing low-priced, low-quality pneumatic rod swivel chairs.

2. Inspect Key Components

• Test the smoothness of the pneumatic rod's lifting and lowering; stuttering or unusual noises may indicate potential issues.
• Confirm that an explosion-proof steel plate with a thickness of at least 2 millimeters is installed between the seat cushion and the pneumatic rod (verify by touch or product specifications).

3. Standardize Usage Habits
   Avoid frequently adjusting the chair's height or maintaining improper sitting postures (such as excessive leaning or spinning) for extended periods, reducing friction and high-temperature exposure of the pneumatic rod (such as keeping it away from heaters and direct sunlight).

Risk Probability

According to a sampling inspection by the State Administration for Market Regulation, the failure rate of office chairs reached 23.3% in 2020, with 17 batches being swivel chairs. The main issues were substandard performance of pneumatic rods and the lack of explosion-proof steel plates. However, genuine products undergo tens of thousands of simulated usage tests from design to production, resulting in a low explosion probability, but the risks associated with low-quality products still warrant caution.