Transparent Round Tubular Glass Vials Test Tube Vials 2ml-50ml

Transparent Test Tube Glass Tube Vials Round

Procuct

Glass tube is a type of non-metal tube, which is a kind of glass with sodium oxide (Na2O), boron oxide (B2O3), and silicon dioxide (SiO2) as the basic components. Its good performance has been widely recognized by all walks of life in the world. Compared with ordinary glass, it has no harmful side effects. Its mechanical properties, thermal stability, water resistance, alkali resistance, acid resistance and other properties are greatly improved. It can be widely used in chemical industry and aerospace. , Military, family, hospital and other fields, have good promotion value and social benefits, the appearance of this kind of glass in our country is another new revolution in the basic material industry.

1. Ordinary glass tube, such as laboratory use;

2. Chemical glass tube, usually made of boron glass with good thermal stability and corrosion resistance. Transparent, easy to clean, low flow resistance, low price. But the pressure resistance is low and it is easy to damage. It can be used in occasions where the temperature does not exceed 80°C and the sudden temperature change is -30~+130°C.

3. Neutral glass tube

4. High borosilicate glass tube

Features

◆ Production in GMP environment

◆ Statistical control on line

◆ Dimensional and cosmetic AQL levels according to ISO

◆ Camera inspection of key dimensional parameters and critical 77 cosmetic defects

◆ Every products delivered are traceable back to time (DD-MM-YY), shift, machine and operator.

principle

The purpose is to eliminate permanent stress and structural imbalance in glass products. Glass is a poor thermal conductor. After the product is formed, the surface layer and the inner layer will have a temperature difference during the cooling process. When the surface layer is solidified and the inner layer is viscous, the temperature difference exists but the stress relaxation does not exist. This temperature difference occurs when the surface layer is cooled to room temperature. , The inner layer continues to cool down and shrinks, which is hindered by the surface layer to produce tensile stress, and at the same time, the surface layer produces compressive stress, which is permanent. The size and distribution of the permanent stress caused by the thermal process in each part of the product will not be uniform, therefore, it will affect the strength of the glass product, and even break by itself due to stress concentration. Annealing can eliminate harmful tension inside the glass and prevent new stress from being generated.