Tempered glass come in the following thickness
1/8", 3/16" or 1/4" Inch
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The smallest size of tempered glass that we can make is 10" x 3" so sizing starts there. The largest we can ship UPS is 36" x 36". If you need sizes bigger than this, or your glass has a pattern, please call us for a special quote.
Standard glass is in Clear, If you need bronze or grey, specify in the order box.
If you need more than one piece and all of your items are exactly the same, you can save time by entering the total number of pieces now. If you need multiple pieces but each piece is a different size, shape, etc. you will need to enter the pieces one by one. You will have a chance later to come back to add additional items to your order. Enter how many pieces you need that are exactly the same.
All Tempered orders take 7-14 working days to process. Because of the nature of this glass, and the way it is made, all sales are final. Because all orders are custom cut, there can be no refunds once the glass is cut. It can take up to 14 days because the glass is cut and then "cooked" in a high temperature oven, and then rapidly cooled. For cost reasons this type of product is done in batches.
When you order fireplace glass from woodstove-fireplaceglass.com. Your trusted source for wood stove and fireplace door glass. We try to fill you order as quickly and accurately as possible.
The price will include U.P.S. Ground Shipping in the continental U.S. after you add your order to the shopping cart and enter your zip code. Then you will be shown the shipping charges.
All other shipping will have to be quoted.
Tempered should be used when standard glass could pose a potential danger. It is four to five times stronger than normal glass and does not shatter into large chunks when broken. Manufactured through a process of extreme heating (tempering) and rapid cooling, tempered glass is significantly harder than regular glass.
The tempered is much harder to break when hit straight on. But if broken this process causes it to shatter into small oval-shaped pebbles. This eliminates the danger of sharp edges. This is why along with its strength, this glass is often referred to as ‘safety glass.’ The Tempering also raises the heat resistance up to about 400-500 degrees F. This is why this glass should be used in any situation where there is a danger of the glass breaking due to impact or extreme heat.
How thick is the piece of glass that you need? (Note that the graphics are representations only, and not the actual thickness. We only have 1/8" , 3/16" and 1/4" inch glass available.
These are the most common sizes for fireplace glass.
Keep in mind this glass can only handle temperatures up to 300-400 degrees, if your appliance produces more heat than this, you should look into
If you have any problems with your order please notify us as soon as possible. If we need to replace an order, the original glass will be issued a pick-up ticket and be sent back for us to apply credit.
To go back to the home page, click here.. Tempered is one of two kinds of safety glass regularly used in applications in which standard glass could pose a potential danger. Tempered glass is four to five times stronger than standard glass and does not break into sharp shards when it fails. Tempered glass is manufactured through a process of extreme heating and rapid cooling, making it harder than normal glass.
The brittle nature of tempered causes it to shatter into small oval-shaped pebbles when broken. This eliminates the danger of sharp edges. Due to this property, along with its strength, tempered glass is often referred to as safety glass.
The thermal process that cures tempered glass also makes it heat resistant. Tempered is used to make the carafes in automatic coffee makers and the windows in ovens. Computer screens, skylights, door windows, tub enclosures and shower doors are more examples of places you will find tempered glass. Building codes also require the windows of many public structures to be made of tempered glass.
Toughened or tempered glass is a type of safety glass processed by controlled thermal or chemical treatments to increase its strength compared with normal glass. Tempering creates balanced internal stresses which cause the glass, when broken, to crumble into small granular chunks instead of splintering into jagged shards. The granular chunks are less likely to cause injury.
As a result of its safety and strength, tempered glass is used in a variety of demanding applications, including passenger vehicle windows, shower doors, architectural glass doors and tables, refrigerator trays, as a component of bulletproof glass, for diving masks, and various types of plates and cookware. In the United States, federal safety laws require that window glass be tempered if each of the following criteria are met: sill height within 18 in (0.457 m) of the floor, top edge greater than 36 in (0.914 m) from the floor, area greater than 9 ft² (0.836 m²), and horizontal distance to nearest walking surface of less than 36 in (0.914 m).[1
Toughened glass is physically and thermally stronger than regular glass. The greater contraction of the inner layer during manufacturing induces compressive stresses in the surface of the glass balanced by tensile stresses in the body of the glass. For glass to be considered toughened, this compressive stress on the surface of the glass should be a minimum of 69 MPa. For it to be considered safety glass, the surface compressive stress should exceed 100 MPa. The greater the surface stress, the smaller the glass particles will be when broken.
It is this compressive stress that gives the toughened glass increased strength. This is because any surface flaws tend to be pressed closed by the retained compressive forces, while the core layer remains relatively free of the defects which could cause a crack to begin.
Any cutting or grinding must be done prior to tempering. Cutting, grinding, sharp impacts and sometimes even scratches after tempering will cause the glass to fracture. The glass solidified by dropping into water, known as "Prince Rupert's Drops", which will shatter when their "tails" are broken, are extreme examples of the effects of internal tension.
The strain pattern resulting from tempering can be observed with polarized light or by using a pair of polarizing sun glasses.
Safety approval markings on an automobile vent window made for a Chrysler car by PPG. Toughened glass is used when strength, thermal resistance and safety are important considerations. The most commonly encountered tempered is that used for side and rear windows in automobiles. It is used for its characteristic of shattering into small cubes rather than large shards and is sometimes referred to as safety glass in this context. (The windscreen or windshield is instead made of laminated glass, which will not shatter when broken.)
Toughened glass is also used in buildings for unframed assemblies (such as frameless doors), structurally loaded applications, and any other application that would become dangerous in the event of human impact.
Rim-tempered indicates a limited area such as the rim of the glass or plate is tempered and is popular in food service.
The term toughened glass is generally used to describe fully tempered glass but is sometimes used to describe heat strengthened glass as both types undergo a thermal 'toughening' process.
There are two main types of heat-treated glass: heat strengthened and fully tempered. Heat strengthened glass is twice as strong as annealed glass while fully tempered glass is typically four to six times the strength of annealed glass and withstands heating in microwave ovens. The difference is the residual stress in the edge and glass surface. Fully tempered glass in the US is generally rated above 65 MPa (9427 psi) in pressure-resistance while heat strengthened glass is between 40 and 55 megapascals (5801 and 7977 psi respectively).
It is important to note that the tempering process does not change the stiffness of the glass. Annealed glass deflects the same amount as tempered glass under the same load, all else being equal. But tempered glass will take a larger load, and therefore deflect further at break.
Toughened glass must be cut to size or pressed to shape before toughening and cannot be re-worked once toughened. Polishing the edges or drilling holes in the glass is carried out before the toughening process starts. Because of the balanced stresses in the glass, damage to the glass will eventually result in the glass shattering into thumbnail-sized pieces. The glass is most susceptible to breakage due to damage to the edge of the glass where the tensile stress is the greatest, but shattering can also occur in the event of a hard impact in the middle of the glass pane or if the impact is concentrated (for example, striking the glass with a point). Using toughened glass can pose a security risk in some situations because of the tendency of the glass to shatter completely upon hard impact rather than leaving shards in the window frame.
The surface of tempered glass does exhibit surface waves caused by contact with the rollers. This waviness is a significant problem in manufacturing of thin film solar cells.[
The first patent on tempered glass was held by chemist Rudolph A. Seiden, born in 1900 in Austria.
Though the underlying mechanism was not known at the time, the effects of "tempering" glass have been known for centuries. In about 1660, Prince Rupert of the Rhine brought the discovery of what are now known as "Prince Rupert's Drops" to the attention of King Charles II. These are teardrop shaped bits of glass which are produced by allowing a molten drop of glass to fall into a bucket of water, thereby rapidly cooling it. They have the curious ability to withstand a blow from a hammer on the bulbous end without breaking, but the drops will disintegrate explosively if the tail end is even slightly damaged. The teardrops were often used by the King as a practical joke
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