The self-explosion rate varies among domestic manufacturers, ranging from 3% to 0.3%. The original industry standard JGJ113-96 mentioned that the amount of glass materials prepared should be 3% more than the usage. The general self-explosion rate is calculated in units of the number of pieces, without taking into account the area size and thickness of each individual piece of glass, so it is not accurate enough and cannot be compared more scientifically. In order to calculate the self-detonation rate uniformly, a unified assumption must be determined. Set a uniform condition: Every 5 to 8 tons of glass contains one nickel sulfide sufficient to cause self-explosion. The average area of each piece of tempered glass is 1.8 square meters. Nickel sulfide is evenly distributed. Then, the self-explosion rate of 6mm thick tempered glass is calculated to be 0.34% to 0.54%, that is, the self-explosion rate of 6mm tempered glass is approximately 3‰ to 5‰. This is basically in line with the actual values of domestic high-level processing enterprises.
In fact, the self-explosion rate of tempered glass in domestic construction projects is usually between 8‰ and 3‰. Therefore, the average self-explosion rate of tempered glass is 5‰. The self-explosion rate values of other combined products such as tempered laminated glass and tempered insulating glass (calculated based on the total thickness of each layer of tempered glass in the product structure). It is also possible to use this as a basis to infer the average number of self-explosions of the combined products with a given area and structure. Or the self-explosion rate can be calculated based on the specific number of self-exploding pieces, the area of a single piece, and the total quantity.
The above indicates that the larger the area of a single piece of tempered glass, the greater the possibility of self-explosion. The thicker the glass structure is, the greater the possibility of self-explosion. This is also consistent with the actual situation. However, in some specific cases, there was one self-explosion for every 27 pieces, which was unacceptable to all parties. Therefore, countermeasures must be sought and reliable solutions found.
Is there any standard regulation on the self-explosion rate of tempered glass? Modern float glass production technology cannot completely eliminate the presence of nickel sulfide impurities, so self-explosion during tempering is inevitable. This is an inherent characteristic of tempered glass. At present, no country in the world has a standard that restricts the spontaneous explosion of tempered glass
