High Borosilicate Glass 3.3 Sheet offers excellent thermal shock resistance, high temperature stability, and chemical durability. With customized sizes and processing options, it is ideal for sight glass windows, industrial equipment, laboratory instruments, and optical applications.
High Borosilicate Glass 3.3 Sheet is manufactured from premium borosilicate glass material with a low coefficient of thermal expansion, excellent thermal shock resistance, and outstanding chemical stability. Compared with ordinary glass, it provides higher temperature resistance, better mechanical strength, and improved durability in demanding environments.
With excellent transparency and corrosion resistance, high borosilicate glass is widely used for industrial sight glass windows, level gauge glass, laboratory equipment, chemical processing systems, solar energy applications, and optical components. Customized sizes, thicknesses, and processing options are available to meet different industrial requirements.
| Item | Specification |
| Material | High Borosilicate Glass 3.3 |
| Main Components | SiO₂, B₂O₃, Al₂O₃, Na₂O |
| Thermal Expansion Coefficient | Approx. 3.3 × 10⁻⁶/K |
| Working Temperature | Up to 550℃ (Application Dependent) |
| Light Transmittance | ≥90% |
| Chemical Resistance | Excellent acid and alkali resistance |
| Thermal Shock Resistance | Excellent |
| Surface Finish | Smooth and transparent |
| Thickness | Customized |
| Size | Customized |
| Processing Options | Cutting, Grinding, Polishing, Drilling, Tempering |
Excellent Thermal Shock Resistance
High Borosilicate Glass 3.3 has a very low coefficient of thermal expansion, approximately one-third that of ordinary glass. This minimizes stress caused by rapid temperature changes and provides excellent resistance to thermal shock, making it suitable for high-temperature and repeated heating applications.
High Temperature Stability
With excellent thermal stability, high borosilicate glass can maintain reliable performance under elevated temperatures. It is widely used in applications requiring continuous exposure to heat, including industrial equipment, laboratory instruments, and high-temperature observation windows.
Superior Chemical Resistance
The addition of boron oxide improves chemical durability, allowing the glass to resist corrosion from many acids, alkalis, and chemical substances. This makes it suitable for chemical processing and laboratory applications.
High Optical Transparency
High Borosilicate Glass 3.3 provides excellent light transmission and optical clarity, making it suitable for applications requiring clear observation and optical performance, such as sight glass windows and optical components.
Excellent Mechanical Strength
Compared with ordinary glass, high borosilicate glass provides improved hardness and mechanical strength, helping components maintain durability during long-term operation.
Custom Processing Capability
High Borosilicate Glass 3.3 sheets can be processed according to different project requirements, including customized dimensions, thicknesses, edge finishing, drilling, polishing, and tempering.
High Borosilicate Glass 3.3 is widely used in:
· Level gauge sight glass windows
· Industrial observation windows
· Chemical processing equipment
· Laboratory instruments
· Pharmaceutical equipment
· Solar energy systems
· Electric light source components
· Optical instruments
· Telescope and mirror components
High Borosilicate Glass 3.3 sheets are manufactured through advanced glass melting and forming processes to ensure stable material performance, excellent transparency, and consistent dimensional accuracy. Strict control of raw materials and production parameters helps achieve reliable quality for industrial applications.
To meet different project requirements, we provide customized processing services including cutting, edge grinding, polishing, drilling, surface treatment, and tempering. Custom sizes, thicknesses, and shapes are available for applications such as sight glass windows, industrial observation panels, and special equipment components.
High Borosilicate Glass 3.3 is a specialized glass material mainly composed of silica (SiO₂), boron oxide (B₂O₃), aluminum oxide (Al₂O₃), and alkali metal oxides. The addition of boron oxide significantly reduces the thermal expansion coefficient and improves resistance to temperature changes.
The "3.3" grade represents the approximate thermal expansion coefficient of the material, which is around 3.3 × 10⁻⁶/K. This unique composition provides excellent thermal stability, chemical durability, and long service life compared with conventional glass materials.
Quality consistency is critical for industrial glass applications. During production, High Borosilicate Glass 3.3 sheets undergo strict inspection procedures to ensure stable performance and reliable use.
Our quality control process includes:
· Raw material inspection
· Glass thickness measurement
· Surface quality inspection
· Dimension accuracy testing
· Transparency inspection
· Thermal performance testing
· Edge and processing quality inspection
Each glass sheet is carefully checked before shipment to ensure it meets customer requirements for industrial applications. Learn more about our glass manufacturing capabilities.
High Borosilicate Glass 3.3 products can be manufactured according to applicable industry requirements and customer specifications. Quality inspection documents and material reports can be provided according to project needs.
Available quality documents may include:
· Material inspection report
· Product specification sheet
· Dimensional inspection report
· Quality certificate
Safe Packaging for Glass Transportation
To ensure safe delivery, High Borosilicate Glass sheets are packed with professional protective solutions. Each glass piece is separated with protective materials to prevent scratches, impact damage, and surface contamination during transportation.
Packaging options include:
· Protective film
· Foam or cushioning materials
· Customized wooden cases
· Export-standard packing solutions
Suitable shipping methods can be arranged according to order quantity, destination, and project schedule.
We support flexible order quantities for different industrial projects. Standard specifications can be supplied efficiently, while customized glass products require confirmation based on processing requirements, dimensions, and production complexity.
Lead time depends on product specifications, customization requirements, and order quantity. Our team provides professional support to ensure efficient production and on-time delivery.
1. Why is High Borosilicate Glass 3.3 preferred for industrial sight glass applications?
High Borosilicate Glass 3.3 is preferred for industrial sight glass applications because it combines excellent transparency, low thermal expansion, high temperature resistance, and strong chemical durability. These properties allow clear observation while maintaining stable performance under demanding operating conditions.
2. How does High Borosilicate Glass 3.3 perform under rapid temperature changes?
Due to its low thermal expansion coefficient, High Borosilicate Glass 3.3 can withstand rapid temperature variations better than ordinary glass. It reduces the risk of cracking caused by thermal stress during heating and cooling cycles.
3. Can High Borosilicate Glass 3.3 be used in chemical processing equipment?
Yes. High Borosilicate Glass 3.3 provides excellent resistance to many acids, alkalis, and chemical substances, making it suitable for chemical processing equipment, laboratory devices, and corrosion-resistant viewing windows.
4. What processing options are available for High Borosilicate Glass sheets?
High Borosilicate Glass sheets can be customized with different processing options, including cutting, edge grinding, polishing, drilling, and tempering according to application requirements.
5. What thickness and sizes are available for High Borosilicate Glass 3.3 sheets?
The thickness and dimensions of High Borosilicate Glass 3.3 sheets can be customized according to customer requirements, application conditions, and equipment specifications.
6. What makes High Borosilicate Glass 3.3 different from tempered glass?
Compared with tempered glass, High Borosilicate Glass 3.3 offers naturally lower thermal expansion and better chemical stability, making it more suitable for high-temperature and chemical environments.
7. Can High Borosilicate Glass be used for optical applications?
Yes. With high transparency, excellent optical clarity, and low deformation characteristics, High Borosilicate Glass is suitable for optical components, mirrors, and precision instruments.
8. How do you ensure the quality of High Borosilicate Glass products?
Quality is controlled through material inspection, dimensional measurement, surface inspection, and performance testing to ensure stable quality and reliable application performance.