What are the classifications of single piece fire-resistant glass?

1) High strength single piece fire-resistant glass

One type is ordinary glass that is chemically and physically tempered to increase surface stress and achieve a certain level of fire resistance, commonly known as single piece cesium potassium fire-resistant glass in the market; One type is ordinary glass that is only physically tempered to increase surface stress and achieve a certain level of fire resistance, commonly known as float white glass high stress fire-resistant glass in the market in the past year.

The advantages of high-strength single piece fire-resistant glass are light weight, low price, and easier market acceptance. The disadvantage is that if the processing technology is not up to standard, surface stress relaxation may occur after long-term use, or partial fire resistance may be lost due to surface and edge scratches and damage; The fire resistance time generally does not exceed 1.5 hours and does not have insulation requirements; There is a phenomenon of self explosion: the pass rate during the fire resistance test is low.

High strength single piece fire-resistant glass is mainly used in situations where there are no insulation requirements and low fire resistance time requirements, such as outdoor fire-resistant windows in buildings.

2) High borosilicate fireproof glass

By utilizing the excellent fire resistance of borosilicate glass with low expansion coefficient and high softening point, it has become a high-performance fire-resistant glass. Developed and produced by Schott GmbH in Germany, it began trial production in China in 2018. Due to its high price, it is generally only used for testing samples of fire-resistant glass. In recent years, the market has gradually accepted it. Domestic production generally adopts two processes: fully electric melting cold top and fully oxygen electric assisted melting hot top. The advantage of high borosilicate fireproof glass is that it is lightweight and has a fire resistance time of generally 2-3 hours; No self explosion; Good product stability, not easily affected by frames and auxiliary materials; Low iron content, more aesthetically pleasing; Excellent corrosion resistance and UV resistance; The water spray system can replace Class A insulated fire-resistant glass systems. The disadvantage is that the product production technology is not mature and the qualified product rate is low; high price; Not possessing thermal insulation properties.

As a high-performance and safe fire-resistant glass, high borosilicate fire-resistant glass is mainly used in fire-resistant windows, building curtain walls, smoke barriers, skylights, fire-resistant floors, etc. Especially, water sprinkler systems can replace Class A insulated fire-resistant glass systems and can be widely used in fire-resistant glass in building courtyards, pedestrian streets, and building fire-resistant partitions.

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