How to measure the pressure of high-temperature exhaust gas? !
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When the temperature reaches 700–800 degrees, how can pressure be measured? The temperature is too high; ordinary pressure gauges can’t handle it, right? Is there anything good? Can you recommend it?
It is measured by using a pressure conduit; the pipeline dissipates heat in the air, so by the time the pressure gauge is reached, the temperature is close to room temperature. When selecting the pressure tapping base, it is important to choose materials resistant to high temperatures; equipment and pipeline materials can serve as a reference. A shut-off valve should be installed in front of the pressure gauge.
No, actually. How long does this pressure tapping tube need to be? Moreover, a drop in temperature has an effect on pressure. 800 degrees has become 20 degrees.
This post was last edited by “Hasty Passerby” on October 26, 2017, at 11:19. This pipe doesn’t need to be very long; the medium inside it doesn’t flow, and since the pipe isn’t insulated, its temperature quickly equals that of the ambient air. The temperatures inside both the boiler and the burner are over 1,000 degrees, and pressure measurements are also taken by leading pipes out. This is the principle of a communicating pipe. Additionally, this situation can also be measured using the blowing method.
The outlet pipe of the pressure gauge is a dead end, resulting in very low heat exchange with the main pipeline. When gas at 800 degrees enters the pressure gauge, its temperature is high; once the gas reaches equilibrium, its temperature drops, and the pressure also becomes balanced. Since the temperature isn’t very high, it’s sufficient to make a 1/2 pipe bend in the outlet pipe – a curve of about forty to fifty centimeters is enough. The temperature on the side of the pressure gauge should not exceed 100 degrees
A living person cannot die from holding in urine, nor can they be roasted by heat. . . So, it’s a pressure-induced cooling measurement. . . For 1-meter and 2-meter pipes, the end of the pipe will have droplets at room temperature. . . . . .
Can a 1- or 2-meter-long pipe, with natural convection outside the pipe, have such high heat dissipation capacity? !
You insert a tube, seal the end of the tube, and feel the end with your hand to figure out where it’s misaligned. . . . When the tube bends, heat transfer comes to a near halt. . . Within the pipe, there is only quasi-static transfer of pressure.
The heat within the gas itself has to be transferred away for its temperature to drop.