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The pressure a quartz glass tube can withstand is closely related to its size (especially wall thickness). The following is a summary of the approximate pressure range of quartz glass tubes under different conditions based on previous information:
1. For quartz tubes with a wall thickness of 3mm:
- Approximately 500 billion Pa (MPa) pressure, equivalent to 5kg/cm2.
2. For quartz tubes with a wall thickness of 5mm:
- Can withstand pressure of 1 trillion Pa (MPa), equivalent to 10kg/cm2.
3. OTS3 transparent quartz glass tube:
The rated working pressure of medium-pressure quartz tubes is 44kg/cm²(about 4.34MPa), and the test pressure is not less than 100kg/cm2 (about 9.81MPa).
The rated working pressure of the high-pressure grade quartz tube is 110 kg/cm2 (about 10.78 MPa), and the test pressure is not less than 200 kg/cm² (about 19.62 MPa).
4. Quartz tubing for high-pressure boiler applications (usually 20-30mm outer diameter, 6mm wall thickness):
- Such specifications are "almost usable", but do not specifically mention pressure values.
5. Quartz glass sheets with a diameter of 179 mm and a thickness of 8 mm:
The positive pressure that can be withstood is about 4 atmospheres (about 400kPa or 0.4MPa).
Please note that these values are estimates under ideal conditions, and the pressure resistance of quartz glass tubes in practical applications will also be affected by the manufacturing process, the presence or absence of internal defects, the proper support, and operating conditions. If it is necessary to determine the exact pressure resistance of quartz glass tubes for a specific application, it is best to consult the manufacturer or perform special tests. In addition, for high pressure applications, factors such as the shape of the quartz tube, the way the ends are sealed, and the matching coefficient of thermal expansion must be considered.
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