Small-diameter quartz tube is a special glass tube with high precision, high purity and excellent physical and chemical properties. It is usually made of high-purity quartz sand through high-temperature melting, drawing and other processes. It has the characteristics of high temperature resistance, corrosion resistance, good light transmittance, strong electrical insulation, etc. Small-diameter quartz tube is widely used in semiconductors, optoelectronics, optical fiber communications, chemical analysis instruments, medical equipment, solar energy and other fields.