Fused thick-walled tube
The thick-walled tubes (also called boiler tubes) made from natural crystal quartz sand have a SiO2 content of 99.999%, The hydroxyl content of quartz tube is less than 1 ppm, a diameter deviation of less than 0.2 mm, and a thickness deviation of less than 0.2 mm.
Mainly used to manufacture high-pressure and ultra-high pressure boiler over-heating tubes, reheater tubes, air tubes, main steam tubes, etc.
