For pressure-rated low-temperature reactors, how should the sight glass glass be selected?
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I am currently facing a problem: the equipment is a vertical type with a mixing container, designed for a temperature of -7°C and a pressure of 0.3 MPa; it has a sight glass opening on the upper head. View glasses shall be selected in accordance with the NB/T 47017-2011 standard; the applicable temperature range for the glass used in these view glasses is 0~250°C. In this case, how should the material for the sight glass be chosen?
This temperature is fine; as long as it meets the requirements based on calculations, it’s okay. Alternatively, one can choose a sight glass with a lower acceptable temperature range.