Physical basis for the self-explosion rate of tempered glass

[China Glass Net] The domestic self-explosion rate is inconsistent among manufacturers, ranging from 3% to 0.3%. The original industry standard JGJ113-96 edition mentioned that the glass preparation should be 3% more than the usage. Generally, the self-explosion rate is calculated in units of the number of pieces, and the area size and glass thickness of the single piece of glass are not considered, so it is not accurate enough, and no more scientific comparison is possible. In order to uniformly measure the self-explosion rate, a unified assumption must be determined. Uniform conditions are determined: every 5 to 8 tons of glass contains a nickel sulfide sufficient to cause self-explosion; the area of ​​each piece of tempered glass is an average of 1.8 square meters; nickel sulfide is evenly distributed. Then calculate the self-explosion rate of 6mm thick tempered glass from 0.34% to 0.54%, that is, the self-explosion rate of 6mm tempered glass is about 3‰~5‰. This is basically consistent with the actual value 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 ,, so the self-explosion rate of tempered glass is 5 平均 on average. Other combinations of products such as tempered interlayers, tempered insulating glass (according to the sum of the thickness of each layer of tempered glass in the product structure). It can also be used as a basis to reverse the average self-explosion quantity of a given product of a given area and structure. Or the self-explosion rate is calculated from the number of specific self-explosive pieces, the single piece area, and the total number.

The above indicates that the larger the single-chip area of ​​tempered glass, the greater the possibility of self-explosion; the thicker the glass structure, the greater the possibility of self-explosion. This also coincides with the actual situation. However, in some specific cases, there is a case of self-destruction every 27 pieces, which is unacceptable to all parties, so we must seek countermeasures and find a reliable solution.
Is there any standard for the self-explosion rate of tempered glass? Modern float glass production technology can not completely eliminate the existence of nickel sulfide impurities, so tempering self-explosion is inevitable, which is an inherent characteristic of tempered glass. At present, there is no national standard in the world that limits the blasting of tempered glass.

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