Glass tubes can generally be divided into four types:
1 ordinary glass tube, such as laboratory use;
2 Chemical glass tubes, commonly made of boron glass with good thermal stability and corrosion resistance. Transparent, easy to clean, low flow resistance, low cost. But the pressure is low and it is easy to damage. Can be used for -30 ~ +130 °C, temperature change does not exceed 80 °C occasions.
3. Neutral glass tube
4 high borosilicate glass tube