Quartz tube is made of natural crystalline quartz (crystal or pure silica), or synthetic silane by high temperature melting quartz glass. After melting products have excellent processing performance, in a very high viscosity range, can be pipe and rod like ordinary glass hot processing, also can use diamond or silicon carbide made of grinding tools for high-speed machining, quartz glass heater to make a variety of complex shapes of instruments and special products. The performance of quartz glass mainly depends on its purity, followed by the process or thermal system. The existence of trace impurities will greatly affect the performance of quartz glass. At the same time, due to the slight negligence of the process or thermal system, it will bring a variety of defects to the appearance quality and produce a large number of waste products.