Tempered glass equals safety glass? These defects the merchants won't tell you! Zhuhai tempered glass customized factory
Release time:
Apr 06,2025
Semi-tempered glass is not equal to safety glass. Merchants may not proactively mention the key shortcomings of semi-tempered glass, such as insufficient safety, poor heat resistance, and inability to be processed. These shortcomings directly affect its applicable scenarios and usage risks.
Core Differences Between Semi-tempered Glass and Safety Glass
Safety Standards
According to the "Regulations on the Management of Building Safety Glass", semi-tempered glass (heat-strengthened glass) does not belong to safety glass. Safety glass needs to pass national mandatory certification (such as 3C certification), while semi-tempered glass does not require such certification.
Fracture Risk
Semi-tempered glass: After breaking, it forms large fragments and radial cracks. Most fragments do not have sharp corners, but they can still cause injury, especially not suitable for skylights and areas where the human body is easily impacted.
Safety glass (such as tempered glass, laminated glass): After breaking, it becomes small particles or fragments that adhere together, and will not splash and cause injury.
Inherent Defects of Semi-tempered Glass
Safety Defects
After breaking, the fragment size is large, the edges are sharp, and there is a risk of cuts.
It cannot meet the high safety requirements of skylights, curtain walls, etc.
Insufficient Heat Resistance
The heat shock resistance of semi-tempered glass is lower than that of tempered glass, its tolerance to temperature difference is limited, and it is easily broken due to thermal stress.
Processing Limitations
Semi-tempered glass cannot be processed a second time (such as cutting and drilling), otherwise it will destroy the internal stress structure, causing self-explosion.
Flatness Issues
Although the flatness of semi-tempered glass is better than that of tempered glass, there may still be slight deformation, affecting the visual effect.
Key Information That Merchants May Conceal
Misleading Applicable Scenarios
Merchants may emphasize the "high strength" or "impact resistance" of semi-tempered glass, but do not clearly state its insufficient safety, leading to consumer misuse.
Vague Performance Parameters
The surface stress (24-69 MPa) of semi-tempered glass is far lower than that of tempered glass (≥69 MPa), but merchants may downplay this difference.
Risk Avoidance
Merchants may avoid mentioning the risk of self-explosion of semi-tempered glass (although lower than tempered glass, it still exists), as well as defects such as inability to be processed and poor heat resistance.
How Consumers Can Avoid Pitfalls
Clarify Needs
If safety glass is required (such as skylights and curtain walls), tempered glass or laminated glass should be chosen instead of semi-tempered glass.
Verify Certification
Safety glass must have a 3C certification mark, while semi-tempered glass does not have this requirement.
Understand Performance Parameters
Require merchants to provide data such as the surface stress value and heat-resistant temperature difference of the glass to avoid being misled by ambiguous publicity.
Sign a Contract
Clearly specify the glass type, performance standards, and liability for breach of contract in the contract to protect your own rights.
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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.