Asbestos grating: characteristics, uses, types, prices …

November 2, 2021

What is an Asbestos Grating and what is its use?

The Asbestos Grid or also called Asbestos cloth is a thin metal mesh, which is used in scientific laboratories.

The Asbestos Grid is used to distribute the temperature evenly when we heat the grid with a burner. To carry out this action, a laboratory tripod is used to support the grid while it heats up.

The Asbestos grid should be placed on the tripod and under the Bunsen burner .

If we need to carry out a work or study in the laboratory, in which we must heat a flask or a glass beaker, the Asbestos grid fulfills the function of ensuring that these devices do not break during heating. That is why this grid is so important. Simplify work that requires heat in the laboratory.

How does the Asbestos grating work?

At the moment in which we light the Bunsen burner , the lighter flame will be under the tripod. The grid will be placed on the tripod and its metallic fibers will spread the heat throughout the grid, ensuring that it distributes said heat evenly.

But in addition, the Asbestos grid is also used with a circular support and an iron ring, in combination with the lighter. These elements complement each other so that the laboratory technician at no time has direct contact with the hot grid.

Why is Asbestos used?

Asbestos contains minerals that have long and very resistant fibers. These fibers can be separated and are flexible enough to intertwine. They also resist high temperatures.

Characteristics of an Asbestos grating

It is a grid that resists heat, thanks to its wire mesh. Glass elements, such as glass glasses, can be supported on it. These can be supported on the rack even during heating.

Physically, the asbestos grating is a square and flat piece of mesh, which has a ceramic in the shape of a circle in its center. But it can have another type of design, although the square one is the most common type.


Even the grates are manufactured in different sizes. There are four inches, five inches and six inches. So we find 10 x 10 cm, 12.7 x 12.7 cm and 15 x 15 cm asbestos gratings.

Because they have these sizes, they can be used with the different Bunsen burners that exist and can also be used with other devices within the laboratory.

Most rack designs can only hold glass containers that have a flat base. When said containers, whether they are glass cups, rest on the grid, this prevents them from breaking when they hit the heat.

When we use a Bunsen burner , generally what we do is place the asbestos grid between the iron ring and the container that we are going to use. The iron ring is used to keep the container above the fire. The function is simple and quite clear. What it does is keep the containers insulated from the heat and thereby prevent them from breaking. In addition, as the glass or glass container is supported by the ring, it has no chance of falling.

These grids spread the temperature of such a way through the glass containers when they are heated, that they do not break.

Uses of Asbestos Grating

Before using an asbestos screen, the laboratory worker must have three elements, which are essential to be able to use the screen properly.

– The Bunsen burner
– The iron ring
– A tripod

By using these three items in conjunction with the rack, glassware can be safely heated. Without this grid, the vessels would have to be heated over the flame and there would be many unwanted accidents in the laboratory. On the contrary, when we use the grid, accidents do not happen.

What precautions to take when using the grid?

Although the use of the grid, it will prevent us from hurting ourselves or suffering burns. Anyway, you have to keep in mind that you work with fire and glass containers. Therefore, the proper and correct use of the grid is essential in these cases.

Make sure to fold the grid around the edges. In this way we ensure that the heat is properly spread.

The correct use is as follows: Step one light the Bunsen burner. Step two place the asbestos grate over the burner and step three, place the glass container on the grate. One of the best options to use on the rack is the Florence flask as it has a flat base.

Two types of asbestos grating

We can choose two types of grids. We have the more traditional grille, which is the one with a ceramic ring holder. These types of grids are used for advanced experiments.

Then we have the grids that are entirely made of metal. These are not so traditional, but they are used in some types of experiments where they are required. They are generally used to support metal containers.

Both types of grates are made of metal and have the same ability to transmit heat efficiently; but it should be noted that only the grate with the ceramic center is the one that allows the heat to be dispersed in a much more uniform and balanced way.

The ceramic in the center of the asbestos grid will not scratch, peel or deteriorate.

How are asbestos gratings made?

In general, all the grids that we find in a laboratory are made with nichrome wire . And they are covered with a thin layer of asbestos. And in other cases the covering is asbestos.

These are materials that are flexible and also withstand heat.

Important: Asbestos has been proven to be harmful to health. But the way it is treated for use on grates. There is no risk.

Dr. Loony Davis5
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Born and raised in Brussels in an English family, I have always lived in a multicultural environment. After several work experiences in marketing and communication, I came to Smart Water Magazine, which I describe as the most exciting challenge of my career.
I am a person with great restlessness and curiosity to learn, discover what I do not know, as well as reinvent myself daily, someone who is curious about life and wants to know. I enjoy sharing knowledge.
This is my personal project but I also collaborate in other blogs, it is the case, the most important web on water currently exists in the US, if you are interested you can read my articles here.

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