What are the reasons for tempered glass self-explosion according to the Foshan glass factory? How to effectively prevent it?
Release time:
Mar 07,2025
The main reasons for self-exploding tempered glass include the following points:
- Reasons for self-explosion
Nickel sulfide impurities:
The nickel sulfide (NiS) impurities contained in the glass change in volume during the phase transition process, leading to an imbalance of internal stress in the glass, which can trigger self-explosion. This is one of the main reasons for the self-explosion of tempered glass.
The volume of nickel sulfide impurities expands and contracts with temperature changes. When its volume expansion exceeds the capacity of the surrounding glass, it can cause the glass to shatter.
Uneven stress distribution:
During production or use, if the stress distribution on the glass is uneven, it may also lead to excessive local stress and self-explosion.
For example, an uneven and asymmetric temperature gradient generated along the thickness of the glass during heating or cooling can make tempered products prone to self-explosion.
Defects such as scratches and chips on the glass surface caused by improper processing can also easily cause stress concentration, increasing the risk of self-explosion.
Changes in external temperature differences:
Although tempered glass can withstand significant temperature differences, sudden changes in temperature can still pose a risk of self-explosion.
Large temperature changes can create thermal stress in the glass, and when the thermal stress exceeds the glass's capacity, it can lead to self-explosion.
II. Preventive measures
To effectively prevent self-explosion of tempered glass, the following measures can be taken:
Choose high-quality products:
When purchasing tempered glass, choose products manufactured by companies with advanced technology and reliable quality.
You can consult the manufacturer or refer to relevant materials to understand the production process and quality control system of the products.
Ensure secure installation:
When installing tempered glass, use appropriate tools and methods to ensure secure installation, avoiding deformation or looseness of the frame.
Deformation or looseness of the frame can exert uneven pressure on the glass, leading to stress concentration and increasing the likelihood of self-explosion.
Leave expansion joints:
When installing tempered glass, reserve appropriate expansion joints according to changes in environmental temperature to accommodate thermal expansion and contraction caused by temperature changes.
This can prevent stress caused by thermal expansion and contraction, reducing the risk of self-explosion.
Heat soaking treatment:
Heat soaking treatment is an effective method to detect and reduce the risk of self-explosion of tempered glass.
Soaking tempered glass at a certain temperature for a period can promote the early volume expansion of residual nickel sulfide impurities inside.
If the glass has a risk of self-explosion, it will break during the heat soaking process, thus avoiding an explosion during actual use.
Apply safety film:
Applying a layer of safety film on the surface of tempered glass can ensure that even if the glass explodes, the fragments will adhere to the film and not scatter.
This can reduce harm to the human body and improve safety.
Regular inspection and maintenance:
Regularly check the surface of tempered glass for cracks, scratches, or other damages.
If any issues are found, promptly contact professionals for handling or replacement.
In summary, by choosing high-quality products, ensuring secure installation, leaving expansion joints, conducting heat soaking treatment, applying safety film, and performing regular inspections and maintenance, the risk of self-explosion of tempered glass can be effectively prevented.
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China Guangdong Haibo Special Glass Technology Co., Ltd. Unified Social Credit Code: 91440101MA5AT33G12 Contact Numbers: General Manager Cao, 13178822749; General Manager Wei, 13533794186.