Borosilicate 3.3 Float Glass Sheet: High-Temperature Glass for Industrial and Technical Applications
Borosilicate 3.3 Float Glass Sheet: High-Temperature Glass for Industrial and Technical Applications
Borosilicate 3.3 float glass sheet is a high-performance flat glass material known for its excellent thermal resistance, low thermal expansion, high optical quality, and good chemical durability.
It is widely used for applications where ordinary soda-lime glass cannot provide sufficient thermal stability or chemical resistance.
Borosilicate 3.3 float glass is commonly searched for under different names, including borosilicate 3.3 glass sheet, borosilicate float glass, borosilicate flat glass, 3.3 borosilicate glass, high temperature borosilicate glass sheet, heat resistant borosilicate glass, and Borofloat glass.
One of the best-known commercial borosilicate float glasses is BOROFLOAT®, developed and manufactured by SCHOTT. The name BOROFLOAT® refers specifically to SCHOTT’s branded borosilicate 3.3 float glass. For customers who require the same general material category or an alternative source, suppliers may also offer borosilicate 3.3 float glass with comparable material characteristics, subject to the specific grade and technical specification.
Jinan JSV Industrial Co., Ltd. supplies borosilicate glass products for international customers, including borosilicate 3.3 float glass sheets, customized flat glass, and other borosilicate glass components for industrial and technical applications.
What Is Borosilicate 3.3 Float Glass?
Borosilicate 3.3 glass is a type of borosilicate glass characterized by a low coefficient of thermal expansion, commonly around 3.3 × 10⁻⁶ K⁻¹.
The term “3.3” is widely associated with the material’s approximate thermal expansion coefficient.
Unlike ordinary soda-lime glass, borosilicate 3.3 glass contains a higher proportion of boron oxide, which contributes to its excellent thermal and chemical properties.
When manufactured using the float glass process, the material forms a flat, smooth, and highly uniform glass sheet with excellent surface quality.
This combination makes borosilicate 3.3 float glass particularly useful for technical glass applications requiring:
● Low thermal expansion
● Excellent thermal shock resistance
● High temperature resistance
● Good chemical resistance
● Good dimensional stability
● High optical quality
● Smooth and flat surfaces
● Excellent surface uniformity
● Good mechanical stability
What Does “3.3” Mean in Borosilicate Glass?
One of the most common questions from buyers is: What does borosilicate 3.3 mean?
The “3.3” designation generally refers to the material’s approximate coefficient of linear thermal expansion of 3.3 × 10⁻⁶ K⁻¹.
A low coefficient of thermal expansion means that the glass changes size relatively little when its temperature changes.
This is one of the most important properties of borosilicate glass.
It helps the material withstand:
● Rapid temperature changes
● Repeated heating and cooling
● High-temperature environments
● Thermal cycling
● Temperature differences across the glass surface
For this reason, borosilicate 3.3 glass is widely used in laboratory equipment, industrial sight glasses, observation windows, lighting components, optical equipment, solar applications, and other technical products.
What Is BOROFLOAT® Glass?
BOROFLOAT® is a well-known branded borosilicate 3.3 float glass manufactured by SCHOTT.
The BOROFLOAT® brand is strongly associated with high-quality borosilicate float glass and is widely recognized in industrial and technical applications.
Customers searching for:
● Borofloat glass
● BOROFLOAT 33
● Borofloat 33 glass
● Borofloat glass sheet
● Borofloat borosilicate glass
● Borofloat 3.3
● SCHOTT Borofloat
are often looking for a high-quality borosilicate 3.3 float glass sheet.
However, BOROFLOAT® is a specific SCHOTT brand, while “borosilicate 3.3 float glass” is a broader material category.
If a project specifically requires genuine SCHOTT BOROFLOAT®, the customer should request and verify the original branded material and relevant documentation.
For projects that require the properties and application range of borosilicate 3.3 float glass, alternative manufacturers and suppliers may provide compatible or comparable materials according to the required specifications.
Borosilicate 3.3 Float Glass vs. Ordinary Glass
The biggest difference between borosilicate 3.3 glass and ordinary soda-lime glass is thermal and chemical performance.
Soda-Lime Glass
Soda-lime glass is the most common type of commercial flat glass.
It is widely used for:
● Windows
● Doors
● Furniture
● Architectural glass
● General-purpose flat glass
However, it has a significantly higher coefficient of thermal expansion than borosilicate glass.
Borosilicate 3.3 Glass
Borosilicate 3.3 glass provides:
● Lower thermal expansion
● Better thermal shock resistance
● Better high-temperature performance
● Better chemical durability
● Excellent dimensional stability
Therefore, when an application involves heat, thermal cycling, chemicals, or demanding industrial conditions, borosilicate 3.3 glass can be a better choice than ordinary soda-lime glass.
Main Applications of Borosilicate 3.3 Float Glass
Borosilicate 3.3 float glass is used in a wide range of technical and industrial applications.
1. Industrial Sight Glass
One of the most important applications is industrial sight glass.
Sight glasses allow operators to observe fluids, gases, flames, or processes inside industrial equipment.
Borosilicate 3.3 glass is suitable for many sight glass applications because of its thermal shock resistance and chemical durability.
Applications include:
● Industrial sight glasses
● Tank sight glasses
● Vessel sight glasses
● Process observation windows
● Pipeline sight glasses
● Flow observation windows
● Boiler sight glasses
● Chemical equipment viewing windows
● Pressure vessel viewing windows
Customers may search for:
borosilicate sight glass, borosilicate glass sight window, industrial sight glass, borosilicate sight glass sheet, high temperature sight glass, heat resistant sight glass, chemical resistant sight glass, and process observation glass.
2. Level Gauge Glass
Borosilicate glass is widely used for level gauge glass and liquid level observation equipment.
Applications can include:
● Boiler level gauges
● Tank level gauges
● Industrial level indicators
● Reflex level gauges
● Transparent level gauges
● Tubular level gauges
● Liquid level viewing systems
Relevant search terms include:
level gauge glass, borosilicate level gauge glass, boiler gauge glass, water level gauge glass, liquid level gauge glass, level indicator glass, high temperature gauge glass, and borosilicate gauge glass.
3. High-Temperature Observation Windows
Borosilicate 3.3 float glass can be used for high-temperature observation windows where clear visibility and thermal resistance are required.
Applications include:
● Industrial ovens
● Heating equipment
● Furnaces
● Kilns
● Combustion systems
● Thermal processing equipment
● Laboratory heating equipment
Common search terms include:
high temperature glass window, heat resistant glass window, furnace viewing glass, industrial observation glass, oven viewing glass, borosilicate viewing window, high temperature observation window, and heat resistant observation glass.
4. Laboratory Equipment
Borosilicate 3.3 glass is well known for laboratory applications.
Its thermal and chemical properties make it suitable for many laboratory products and components.
Applications may include:
● Laboratory windows
● Laboratory equipment
● Scientific instruments
● Glass vessels
● Laboratory reactors
● Heating equipment
● Analytical instruments
● Chemical laboratory equipment
Customers may search for:
borosilicate laboratory glass, borosilicate glass sheet, laboratory glass sheet, high temperature laboratory glass, chemical resistant glass, and borosilicate glass for laboratory equipment.
5. Industrial Equipment
Borosilicate 3.3 flat glass can be used in various industrial machines and equipment where conventional glass may not provide sufficient thermal performance.
Potential applications include:
● Industrial equipment windows
● Machine observation windows
● Process equipment
● Chemical processing equipment
● Thermal processing systems
● High-temperature machinery
● Industrial inspection windows
● Equipment display windows
6. Lighting Applications
Borosilicate glass is also used in selected lighting applications because of its thermal stability and optical properties.
Potential applications include:
● Lamp covers
● Lighting glass
● High-temperature lamp windows
● Halogen lamp components
● Industrial lighting
● Explosion-resistant lighting components
● Specialized lighting equipment
Relevant searches may include:
borosilicate lighting glass, borosilicate lamp glass, heat resistant lamp glass, high temperature lamp cover, borosilicate glass lamp cover, and industrial lighting glass.
7. Solar and Photovoltaic Applications
Borosilicate float glass can also be considered for selected solar and photovoltaic applications where low thermal expansion, optical properties, and temperature resistance are important.
Potential applications include:
● Solar thermal equipment
● Solar collectors
● Concentrated solar systems
● Photovoltaic equipment
● Solar research equipment
● Thermal solar components
The appropriate glass specification depends on the optical, thermal, mechanical, and environmental requirements of the system.
8. Cover Glass and Protective Windows
Borosilicate 3.3 float glass can be processed into protective covers and windows for technical equipment.
Potential applications include:
● Instrument windows
● Display protection
● Equipment covers
● Sensor windows
● Camera protection
● Optical instrument covers
● Industrial control equipment
● Laboratory instrument windows
The glass can be cut and processed according to the required dimensions and design.
Key Advantages of Borosilicate 3.3 Float Glass
Low Thermal Expansion
The low coefficient of thermal expansion is one of the most important advantages of borosilicate 3.3 glass.
It helps reduce thermal stress when the glass is exposed to temperature changes.
Excellent Thermal Shock Resistance
Borosilicate glass is known for its ability to withstand rapid temperature changes compared with ordinary soda-lime glass.
This makes it suitable for:
● Hot equipment
● Laboratory equipment
● Sight glasses
● Heating systems
● Industrial observation windows
High Temperature Resistance
Borosilicate glass can operate in elevated-temperature environments when the correct grade and design are selected.
The actual maximum service temperature depends on factors such as:
● Glass grade
● Thickness
● Mounting method
● Heating rate
● Cooling rate
● Temperature distribution
● Mechanical stress
Therefore, the application conditions should always be evaluated before selecting the glass.
Excellent Chemical Resistance
Borosilicate glass generally provides good resistance to water, many acids, and various chemicals.
This makes it useful for:
● Chemical equipment
● Laboratory equipment
● Industrial process equipment
● Sight glasses
● Observation windows
Excellent Flatness and Surface Quality
The float manufacturing process produces a flat glass sheet with a smooth and uniform surface.
This is important for applications involving:
● Optical visibility
● Instrument windows
● Equipment covers
● Observation windows
● Sensors
● Technical components
Borosilicate 3.3 Float Glass Thickness and Sizes
Borosilicate float glass is available in different thicknesses and dimensions depending on the manufacturer and product specification.
For customized projects, customers may require:
● Custom thickness
● Custom width
● Custom length
● Precision cutting
● Round glass
● Rectangular glass
● Square glass
● Special shapes
Additional processing may include:
● Edge grinding
● Edge polishing
● Drilling
● CNC machining
● Special shaping
● Surface processing
Jinan JSV Industrial Co., Ltd. can supply borosilicate glass products according to customer specifications and application requirements.
Customers can provide drawings or technical specifications for customized projects.
Borosilicate 3.3 Float Glass for OEM Applications
OEM manufacturers often need flat borosilicate glass components designed specifically for their equipment.
Typical OEM customers may include manufacturers of:
● Industrial equipment
● Laboratory equipment
● Sight glass assemblies
● Level gauges
● Heating equipment
● Ovens
● Furnaces
● Lighting equipment
● Chemical processing equipment
● Scientific instruments
● Solar equipment
For OEM projects, customers can provide:
● Product drawings
● Glass dimensions
● Thickness
● Tolerances
● Edge requirements
● Hole dimensions
● Operating temperature
● Chemical environment
● Quantity requirements
This information helps determine the appropriate borosilicate glass specification.
Borosilicate 3.3 Glass vs. BOROFLOAT®
When purchasing borosilicate float glass, customers may encounter the term BOROFLOAT®.
It is important to understand the terminology.
BOROFLOAT® is a specific branded borosilicate 3.3 float glass product associated with SCHOTT.
Borosilicate 3.3 float glass is the broader material category.
Therefore:
BOROFLOAT® = a specific branded product
while
borosilicate 3.3 float glass = a broader category of material
If your project specifies genuine BOROFLOAT®, the original manufacturer, grade, and documentation should be confirmed.
If the project specification only requires borosilicate 3.3 float glass with particular thermal, optical, dimensional, or chemical properties, alternative suppliers may be evaluated according to the technical requirements.
How to Choose a Borosilicate 3.3 Float Glass Supplier in China
When looking for a borosilicate 3.3 glass manufacturer in China, buyers should evaluate the supplier based on the complete product specification rather than price alone.
Important factors include:
Material Composition
The supplier should provide clear information about the glass grade and material properties.
Thermal Expansion
For many technical applications, the coefficient of thermal expansion is one of the most important specifications.
Thickness Tolerance
Consistent thickness is important for equipment assembly and optical applications.
Surface Quality
Float glass should have good surface quality for applications where clear visibility is required.
Dimensional Accuracy
Accurate cutting is important for OEM glass components.
Processing Capability
The supplier may need to provide:
● Cutting
● Edge grinding
● Edge polishing
● Drilling
● CNC processing
● Custom shapes
Quality Control
For industrial applications, consistent material quality and dimensional accuracy are important.
Export Capability
International buyers also need appropriate packaging and shipping arrangements.
Borosilicate 3.3 Float Glass Manufacturer and Supplier in China
Jinan JSV Industrial Co., Ltd. supplies borosilicate glass products to international customers for industrial, laboratory, thermal, chemical, optical, and equipment applications.
Our product range can include:
● Borosilicate 3.3 float glass
● Borosilicate 3.3 glass sheet
● Borosilicate flat glass
● High-temperature borosilicate glass
● Borosilicate sight glass
● Borosilicate gauge glass
● Customized borosilicate glass components
Customers can contact Jinan JSV Industrial Co., Ltd. for customized borosilicate 3.3 float glass sheets, including specific sizes, thicknesses, shapes, edge processing, and other requirements.
Common Search Keywords for Borosilicate 3.3 Float Glass
International customers may search for this product using many different keywords.
Material Keywords
● Borosilicate 3.3 glass
● Borosilicate 3.3 float glass
● Borosilicate 3.3 glass sheet
● Borosilicate 3.3 flat glass
● Borosilicate float glass
● Borosilicate flat glass
● Borosilicate glass sheet
● Borosilicate glass plate
● 3.3 borosilicate glass
● High temperature borosilicate glass
● Heat resistant borosilicate glass
● Technical borosilicate glass
BOROFLOAT® Related Searches
● Borofloat glass
● BOROFLOAT® glass
● Borofloat 33
● Borofloat 3.3
● Borofloat glass sheet
● Borofloat borosilicate glass
● SCHOTT Borofloat
● Borofloat alternative
● Borofloat equivalent
● Borosilicate 3.3 float glass alternative
Industrial Keywords
● Industrial borosilicate glass
● Borosilicate industrial glass
● Borosilicate observation glass
● Borosilicate viewing glass
● High temperature observation glass
● Industrial viewing window
● Heat resistant viewing glass
● Borosilicate inspection window
● High temperature glass window
Sight Glass Keywords
● Borosilicate sight glass
● Borosilicate sight glass sheet
● Industrial sight glass
● High temperature sight glass
● Heat resistant sight glass
● Chemical resistant sight glass
● Process sight glass
● Tank sight glass
● Vessel sight glass
● Borosilicate process glass
Gauge Glass Keywords
● Borosilicate gauge glass
● Level gauge glass
● Boiler gauge glass
● Boiler level gauge glass
● Liquid level gauge glass
● Level indicator glass
● Borosilicate level gauge
● High temperature gauge glass
● Transparent level gauge glass
China Supplier Keywords
● Borosilicate 3.3 glass manufacturer China
● Borosilicate 3.3 glass supplier China
● Borosilicate 3.3 float glass manufacturer China
● Borosilicate 3.3 float glass supplier China
● Borosilicate glass sheet manufacturer China
● Borosilicate flat glass manufacturer China
● Borosilicate float glass supplier China
● High temperature borosilicate glass manufacturer China
● Borosilicate sight glass manufacturer China
● Borosilicate gauge glass manufacturer China
● Custom borosilicate glass manufacturer China
Frequently Asked Questions
What is borosilicate 3.3 glass?
Borosilicate 3.3 glass is a specialized borosilicate glass with a low coefficient of thermal expansion, commonly associated with approximately 3.3 × 10⁻⁶ K⁻¹.
What is borosilicate 3.3 float glass?
Borosilicate 3.3 float glass is flat borosilicate glass manufactured using the float process. It combines the thermal and chemical properties of borosilicate glass with the flatness and surface quality of float glass.
What is BOROFLOAT®?
BOROFLOAT® is a branded borosilicate 3.3 float glass product manufactured by SCHOTT. It is a specific commercial brand and should not be treated as a generic name for every borosilicate 3.3 float glass.
Is BOROFLOAT® the same as borosilicate 3.3 glass?
BOROFLOAT® is a specific branded product within the broader category of borosilicate 3.3 float glass. Other manufacturers may produce borosilicate 3.3 float glass with comparable or different specifications.
What is borosilicate 3.3 glass used for?
Applications include industrial sight glasses, level gauge glass, laboratory equipment, furnace viewing windows, high-temperature observation windows, industrial equipment, heating equipment, lighting components, and other technical applications.
Is borosilicate 3.3 glass heat resistant?
Yes. Borosilicate 3.3 glass has excellent thermal resistance and thermal shock resistance compared with ordinary soda-lime glass. The actual service temperature depends on the specific glass grade and application conditions.
Can borosilicate 3.3 float glass be cut to size?
Yes. Borosilicate float glass can be supplied or processed into customized dimensions and shapes depending on the required thickness, size, tolerances, and processing requirements.
Can borosilicate 3.3 glass be used as sight glass?
Yes. Borosilicate glass is widely used for industrial sight glasses and observation windows where thermal shock resistance and chemical durability are required.
Where can I buy borosilicate 3.3 float glass from China?
International customers can source borosilicate 3.3 float glass from specialized Chinese glass manufacturers and suppliers. Jinan JSV Industrial Co., Ltd. supplies borosilicate glass products for industrial, laboratory, thermal, and equipment applications.
Conclusion
Borosilicate 3.3 float glass is a high-performance flat glass material designed for applications requiring low thermal expansion, thermal shock resistance, chemical durability, high-temperature performance, and excellent surface quality.
It is widely used in industrial sight glasses, level gauge glass, furnace viewing windows, high-temperature observation windows, laboratory equipment, heating equipment, industrial machinery, lighting components, and other technical applications.
Customers may search for this product using terms such as borosilicate 3.3 glass, borosilicate float glass, borosilicate glass sheet, high temperature borosilicate glass, Borofloat glass, heat resistant glass sheet, industrial sight glass, or borosilicate viewing glass.
For customers specifically looking for BOROFLOAT®, the brand and original manufacturer should be verified. For projects requiring the broader category of borosilicate 3.3 float glass, alternative manufacturers can be evaluated based on the required material and technical specifications.
Jinan JSV Industrial Co., Ltd. supplies borosilicate 3.3 glass sheets and customized borosilicate glass products for international customers. Contact us for borosilicate 3.3 float glass, borosilicate flat glass, customized glass sheets, sight glass, gauge glass, and OEM glass components.