Strength of nitrogen-sealed glass for fire foam pipes in storage tanks
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1. There is currently a 10,000 cubic meter styrene storage tank equipped with a nitrogen seal; the tank is designed to withstand pressures of up to 300 mmaq, while the pressure at which the emergency release valve opens is 150 mmaq. There are also 3 vent valves. Additionally, 5 fire foam pipes are arranged evenly at a distance of 200 mm from the bottom edge of the tank roof. To prevent styrene gas from entering these fire foam pipes, special glass barriers are used at the points where they connect to the tank. May I ask what the pressure resistance requirements are for the glass in this area, and are there any design specifications?
I once found on the internet that the glass thickness of the foam generator in oil tanks should not exceed 3 millimeters, but it seems there are no regulations or standards regarding this.
Looking forward to the experts clarifying things for us
1. The glass used in air foam generators for storage tanks is usually supplied by the manufacturers of these generators as part of the complete generator assembly; it seems that there is no separate standard for it； 2. Glass sheets can generally be broken under a water pressure of 0.1~0.2 MPa; for specific requirements regarding thickness, etc., it is recommended to consult the manufacturer of the air foam generator. For reference!
1. I checked, and it seems that the thickness wasn’t found; I asked a colleague at the head office today, and the thickness is 3 mm. 2. Generally, glass sheets can be broken under a water pressure of 0.1–0.2 MPa, and since one side of the glass has cracks that make it prone to breaking, that side should be oriented toward the nozzle