Nitrogen Office Chair Explosion

Nitrogen office chairs generally do not explode when filled with pure nitrogen under normal use conditions. However, explosions may occur if the gas is impure or compressed air is used instead of nitrogen. The specific reasons are as follows:

1. High safety when filled with pure nitrogen Nitrogen is an inert gas with stable chemical properties and is not prone to reacting with other substances. When properly filled with nitrogen in the gas spring of an office chair, it can withstand weights of up to one thousand kilograms. Under normal use scenarios, such as daily sitting pressure and lifting operations, it will not trigger an explosion due to pressure changes or chemical reactions. This stability makes nitrogen an ideal choice for filling gas springs, effectively ensuring the safety of office chair use.

2. Explosion risk when the gas is impure or mixed with other substances If the purity of nitrogen in the gas spring is insufficient and it is mixed with oxygen or other substances, the situation changes. Under high-temperature conditions or frequent friction, these impurities may react chemically with nitrogen or other components, causing an abnormal increase in internal pressure within the gas spring. When the pressure exceeds the bearing limit of the gas spring, an explosion will occur. For example, in hot weather, prolonged use of an office chair can cause the gas spring to heat up due to friction. If the internal gas is impure, it may pose a danger.

3. Hazards of using compressed air instead of nitrogen Some unscrupulous merchants, in order to reduce costs, fill the gas springs with compressed air instead of nitrogen. Compressed air contains oxygen, which can react chemically with the metal materials inside the gas spring, gradually eroding the inner wall of the gas spring and making the metal parts brittle. During daily use, the repeated lifting of the office chair generates friction and high temperatures, which further accelerates the damage to the metal parts, leading to a continuous increase in internal pressure within the gas spring. Once the pressure exceeds the bearing limit, an instant explosion will occur, causing serious harm to the user. For instance, the chair explosion incident experienced by Ms. Liu in Xiamen in 2013 was likely caused by the presence of other substances in the gas spring or the use of compressed air.