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1-800-295-2392 or click below to call one of our regional representatives. Call Regional Customer Service Representative
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For applications where fused quartz tubing is exposed to internal pressures, the following formula helps determine the maximum pressure which can be applied at room temperature.
S = pr/t
Where:
S = Hoop Stress (Pa)
p = Working pressure (Pa)
r = Inside Radius of Tube (mm)
t = Wall Thickness (mm)
This formula is not applicable when the internal pressure exceeds 7x105 Pa (100 psi).
Many applications of fused quartz discs, plates and sight glasses require calculating pressure differential. The following formulae can be used for room temperature applications of circular parts with either clamped or unclamped edges.
Where:
p = Pressure differential (Pa)
ro = Unsupported disc radius (mm). For plates substitute ro with width
Smax = Maximum stress (approx. 7 to 1 safety factor) 7.0 x 106 Pa
t = Disc thickness (mm)
However, the following factors will effect the strength of these parts and must be considered when using the formulae:
For more information regarding the use guidelines for fused quartz, click here.
*The marks followed by an asterisk (*) are trademarks of Momentive Performance Materials Inc.