Round transparent high borosilicate glass is a type of glass with silica and boron trioxide as the main glass-forming constituents. Borosilicate glasses are known for having very low coefficients of thermal expansion , making them more resistant to thermal shock than any other common glass. Such glass is subjected to less thermal stress and can withstand temperature differentials without fracturing of about 165 °C (300 °F).It is commonly used for the construction of reagent bottles and flasks, as well as lighting, electronics, and cookware.
Benefits of Round Transparent High Borosilicate Glass
Optical clarity: It's clear to see why glass is a good solution when it comes to visibility (how could I resist this pun). Compared to the array of plastics, metals and other materials of construction, round transparent high borosilicate glass provides a smooth surface that offers an unobstructed view of what is going on inside the equipment, enhancing the level of observation in any process.
Cleanability: Some materials of construction can pose housekeeping issues when it comes to ease of cleaning. Not glass! The anti-stick, nonporous surface makes borosilicate glass a popular choice for GMP compliant applications. And its transparency allows you to see when equipment needs to be cleaned without the need for interrupting the process and performing an internal inspection.
Compact design: Compared to systems built using alternative materials of construction, glass components are much more compact making a glass system significantly smaller. This is especially beneficial in facilities that are facing space constraints as well as work areas where headroom can become an issue. The compact arrangement can also make shipping, delivery, and installation easier.
Corrosion resistance: Similar to the properties of glass-lined steel, glass equipment provides unsurpassed corrosion resistance to water, neutral and acidic solutions, concentrated acids and acid mixtures, and to chlorine, bromine, iodine and organic substances. Its resistance to chemical attack is superior to that of most metals and other materials, even during prolonged periods of exposure and at temperatures above 100 °C. There are only a few chemicals which can cause noticeable corrosion of the glass surface - hydrofluoric acid, concentrated phosphoric acid and strong caustic solutions at elevated temperatures. However, at ambient temperatures caustic solutions up to 30% concentration can be handled by borosilicate glass without difficulty.
Temperature range: Round transparent high borosilicate glass' strong resistance to temperature makes it desirable in chemical and pharmaceutical processes. The maximum permissible operating temperature for QVF borosilicate glass is 200°C (due to limiting factors such as PTFE gaskets). Above a temperature of 525°C the glass begins to soften and above a temperature of 860°C it changes to the liquid state. Conversely, it can be cooled down to the maximum possible negative temperature, but is generally recommended for use down to – 80°C. An additional benefit within temperature allowance is the ability for borosilicate glass to be exposed to two different temperatures at the same time (though for safety reasons it is recommended that temperature difference does not exceed 100 K).
Structural integrity due to low thermal expansion: Directly related to the large temperature differential comes the benefit of low thermal expansion. Round transparent high borosilicate glass doesn't expand like ordinary glass, there is a smoother transition between temperatures as well as the ability to withstand different temperatures at the same time. Borosilicate glass has an extremely low coefficient of linear expansion (3.3 x 10–6 K–1) as a result of its low thermal expansion. Additionally, the low thermal expansion coefficient eliminates the need for expensive measures to compensate for thermal expansion resulting from changes in temperature. This becomes especially significant in the layout of long runs of glass pipeline, ensuring a high level of structural integrity. For this reason, borosilicate glass is an approved and proven material in the construction of pressure equipment.
Affordability: Compared to other materials of construction that offer similar properties such as corrosion resistance, glass is relatively economical to produce. When compared to the other options such as quartz, glass is an extremely affordable solution. Its sustainability is an additional factor that adds to its affordability; with proper maintenance and care, your glass equipment can have a long life.
Inert behavior: Because there is no interaction or ion exchange between the process media and glass, there is no catalytic effect. The inertness of round transparent high borosilicate glass also means it is nonflammable and poses no environmental risk. Due to the inert behavior of QVF glass there is no smell or taste alterations and can therefore be used in an almost unrestricted way in pharmaceutical applications and in the food and beverage industry.
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Round Transparent High Borosilicate Glass Vs Soda Lime Glass Vs Pyrex – What Is The Difference?
| Compound | Round transparent high borosilicate glass – % content | Soda Lime Glass – % content |
| Silicon Dioxide SiO2 | 80.6 | 69 |
| Boron Trioxide B2O3 | 13 | 1 |
| Sodium Oxide Na2O | 4 | 13 |
| Aluminium Oxide Al2O3 | 2.4 | 4 |
Is Round Transparent High Borosilicate Glass More Durable?
Sudden temperature changes – Avoid shocking borosilicate glass with sudden and drastic temperature changes. Moving borosilicate glass directly from a freezer into an oven can shock the material and cause it to crack.
High drops – Just because it can survive a few bumps and knocks without cracking or chipping doesn't mean you can drop a borosilicate dish from the top of your counter onto a hard stone floor.
Physical trauma –Round transparent high borosilicate glass is still glass. Don't think that just because it's more durable it can stand up to a hefty smack. It will break if you throw it or hit it with something hard or heavy.
What Are The Uses Of Round Transparent High Borosilicate Glass?
High-intensity lighting products
Stage lights and lighting products used in the film industry make use of borosilicate glass lenses, as these lights can reach high temperatures when operated continuously for hours on end. Other lamp products that use high-intensity discharge (HID), such as mercury vapor lamps or metal halide lamps, will make use of borosilicate lenses or outer envelopes.
Laboratory glassware
The high dimensional stability and ability to tolerate exposure to different temperatures at the same time make round transparent high borosilicate glass a natural material choice from which to create laboratory glassware, also called labware. Petri dishes, microscope slides, bottles, beakers, flasks, test tubes, funnels, and measuring instruments such as graduated cylinders are all common examples. Besides the favorable thermal properties, borosilicate glass is very resistant and non-reactive to most chemicals.
Thermal insulation
The thermal properties of round transparent high borosilicate glass were used to fabricate the thermal tiles that protected the space shuttle from the heat of reentry into earth's atmosphere.
Bakeware and cookware
Among its first and most common uses is in the creation of household cookware and bakeware. The thermal properties of borosilicate cookware allow it to be transported from a hot oven to a cool countertop without fear of cracking or shattering. It is also used in products such as measuring cups and is safe for use in microwave ovens and dishwashers.
Sight glass
In industrial processes, tanks make use of sight glasses that are often fabricated from round transparent high borosilicate glass. These sight glasses allow for the visual monitoring of substances and processes without the need to open the tank or storage vessel, and without interrupting the process.
Aircraft exterior lenses
The exterior lamps on an aircraft use borosilicate glass lenses due to the clear optical properties (transmissibility) and the ability to withstand the temperature differential experienced during high altitude flight. Figure 1 below shows an example of the optical transmission characteristics of one type of borosilicate glass. Note the very flat performance across the full spectrum of wavelength from 300 – 1200 nm.
Scientific lenses and hot mirrors
Round transparent high borosilicate glass can be molded into high precision optical components such as lenses for use in telescopes and other precision optical devices. The low coefficient of thermal expansion for borosilicate glass means that the optical properties of the lenses will be stable over changes in temperature as the glass lens will not significantly change its dimensions. The glass is also ideal for use in hot mirrors that reflect infrared light.
General Precautions For Round Transparent High Borosilicate Glass
● We recommend that all glassware is washed before it is first used.
● Before using any piece of glassware, always take time to examine it carefully and ensure that it is in good condition. Do not use any glassware that is scratched, chipped, cracked or etched. Defects like these can seriously weaken the mechanical strength of the glass and cause it to break in use.
● Round transparent high borosilicate glass should under no circumstances be dispose of broken or defective glassware safely. Use a purpose-designed disposal bin that is puncture resistant and clearly labelled. Pyrex® glassware (or any other borosilicate glass) should under no circumstances be disposed of in a domestic glass recycling stream (e.g. bottle banks), as its high melting point makes it incompatible with other glass (soda-lime glass) for recycling. The correct method of disposal is to include it in the general waste in accordance with the relevant guidelines, provided that the glass is free from any harmful chemical contamination.
● Never use excessive force to fit rubber bungs into the neck of a piece of glassware. Always ensure that you select the correct size of bung.
● Many glass products are supplied with durable, easy to use plastic screw thread tubing connectors to allow the safe fitting of any flexible tubing. When attaching tubing, ensure that the screw thread connector is removed from the glassware, the tubing is lubricated and protective gloves are worn. Never use excessive force to connect the rubber hose or tubing.
● Carrying or lifting large glass flasks, beakers or bottles, etc. by the neck or rim can be very dangerous. Always provide support from the base and sides.
● When stirring solutions in glass vessels, avoid using stirring rods with sharp ends which can scratch the glassware causing it to become weakened.
Tips For Purchasing Round Transparent High Borosilicate Glass
If your application involves exposure to chemicals, it is important to choose round transparent high borosilicate glass that is resistant to those chemicals. You should consider the pH range and specific chemicals that the glass will be exposed to in order to choose a glass that is suitable for your application.
If your application involves exposure to extreme temperatures, it is important to choose round transparent high borosilicate glass that is rated to withstand those temperatures. The glass should be able to withstand the maximum and minimum temperatures it will be exposed to without breaking or shattering.
If your application requires good visibility through the glass, it is important to choose a round transparent high borosilicate glass with good optical clarity. This will ensure that you can see through the glass clearly without any distortions or distortions.
You should also consider the size and shape of the round transparent high borosilicate glass that is appropriate for your application. The glass should be able to fit into the required space and have the appropriate shape for your needs.
The mechanical strength of the round transparent high borosilicate glass should be considered if your application involves the glass being subjected to stress or impact. You should choose a glass with a high level of mechanical strength in order to ensure it can withstand the forces it will be subjected to.
Types of Round Transparent High Borosilicate Glass
Lead glass
Lead glass has a high percentage of lead oxide (at least 20% of the batch). It is relatively soft, and its refractive index gives a brilliance that may be exploited by cutting. It is somewhat more expensive than soda-lime glass and is favored for electrical applications because of its excellent electrical insulating properties. Thermometer tubing and art glass are also made from lead-alkali glass, commonly called lead glass. This glass will not withstand high temperatures or sudden changes in temperature.
Soda-lime glass
Soda-lime glass is the most common (90% of glass made), and least expensive form of glass. It usually contains 60-75% silica, 12-18% soda, 5-12% lime. Resistance to high temperatures and sudden changes of temperature are not good and resistance to corrosive chemicals is only fair.
Round transparent high borosilicate glass
Round transparent high borosilicate glass is any silicate glass having at least 5% of boric oxide in its composition. It has high resistance to temperature change and chemical corrosion. Not quite as convenient to fabricate as either lime or lead glass, and not as low in cost as lime, borosilicate's cost is moderate when measured against its usefulness. Pipelines, light bulbs, photochromic glasses, sealed-beam headlights, laboratory ware, and bake ware are examples of borosilicate products.
Aluminosilicate glass
Aluminosilicate glass has aluminum oxide in its composition. It is similar to borosilicate glass but it has greater chemical durability and can withstand higher operating temperatures. Compared to borosilicate, aluminosilicates are more difficult to fabricate. When coated with an electrically conductive film, aluminosilicate glass is used as resistors for electronic circuitry.
Fused silica glass
Fused silica glass is pure silicon dioxide in the non-crystalline state. It is very difficult to fabricate, so it is the most expensive of all glasses. It can sustain operating temperatures up to 1200°C for short periods. (see: Glass and the Space Orbiter )
Company Advantages
Heyuan Hongwei Glass Co., Ltd. located in Heyuan City, the National High-tech Development Zone.The product is positioned in the high-end TV, monitor, home-used air conditioning, refrigerator and other household appliances related to glass products.The company has a 10000 square meters modern deep processing room ,with cutting and grinding integrated molding edge grinding machine, automatic inspection equipment, CNC machining center, continuous tempering furnace and other glass deep processing equipment,Ensure that the glass is cut, grinded, special-shaped, and tempered (2-5mm) for finishing,Specializing in the production of high-precision TV, LCD/LED screen protection glass, AR anti-reflection glass, digital picture frames, advertising machines, photocopier glass, etc.
Our Certificate
Our company passes ISO90001. 3C Certification.Our products comply with ROHS, REACH, EN12150-1 and other standards
Asked Questions
Q: Why did Pyrex stop using borosilicate glass?
Q: Is high borosilicate glass lead free?
Q: What is high borosilicate glass?
Q: Which is better Pyrex or borosilicate?
Q: Is borosilicate glass safe or toxic?
Q: Does borosilicate glass leach?
Q: What is the safest glass to drink from?
Q: Can you put borosilicate glass in the microwave?
Q: Can borosilicate glass crack?
Q: Can you put boiling water in borosilicate glass?
Q: How can I tell if glass is borosilicate?
Q: Is borosilicate glass expensive?
Q: Will borosilicate glass break if dropped?
Q: Is there BPA in borosilicate glass?
Q: Can you refrigerate borosilicate glass?
Q: Does borosilicate glass contain heavy metals?
Q: Does borosilicate contain lead?
Q: Does borosilicate glass transmit UV?
Q: How can you tell if glass is toxic?
Q: Is borosilicate glass stovetop safe?
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