Issues related to the operating pressure of gas cabinets
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I would like to ask: what is the operating pressure for gas tanks in various locations? What is the typical operating pressure used for different types of gas tanks? I specified a requirement for the gas holder, asking for 400 millimeters of water column pressure, but the equipment supplier said it was not possible to achieve that! This post was last edited by hw197358 on 2009-2-13 13:01.]
It is recommended to look in the container and tower equipment section of the mechanical equipment exchange area.
The operating pressure depends mainly on the composition of the gas recovered by the gas holder and the pressure of each component; generally, the pressure before the gas holder is not very high. The 400 mm water column value you mentioned should be achievable
Pressure inside the cabinet: For wet-type gas cabinets, due to the water seal in place, they can only function as low-pressure cabinets, with the pressure inside reaching a maximum of 4 kPa (400 millimeters of water column)； For dry gas cabinets, the pressure within them can be increased by means such as adding counterweights, and pressures of 8000 pa to 10000 pa can be achieved, which should not be a problem.
For wet-type gas cylinders, they are generally used as low-pressure cylinders, with the pressure inside being usually below 4 kPa (400 millimeters of water column). In actual use, the pressure of such cylinders can be adjusted appropriately by modifying the counterweights.
A pressure of 400 mm water column is very low; it’s not that the equipment cannot withstand this pressure. It’s likely that such a low pressure is insufficient to lift the lid of the floating gas tank, and therefore it’s impossible to store gas in it.
The requirement of 400mm water column is way too low
This pressure is fine. I used to work in the production and delivery of water gas; the pressure in our gas storage tanks was around 400 MM, and they worked perfectly well – it was wet-type storage tanks with capacities of 1000 cubic meters and 5000 cubic meters.
The conditions mentioned by the original poster aren’t clear, so I’ll use the gas tanks in refineries as an example to explain our situation. The operating pressure of the refinery gas holder is determined by the water level in the flare water seal tank, with the water level available in a range of 1.2, 1.0, 0.8, 0.6, and 0.4 meters. Of course, a specific water-sealing tank may not have that many settings; usually there are 3 settings, with the highest value being 1.2m and the lowest being 0.4m. 0.4m is the lowest safe water seal for the flare; the pressure is too low to support the gas holder, and as a result the gas holder and the compressor cannot operate. Once operations resume normally, measures will be taken to increase the water seal height. It can operate at heights of over 0.8m. I’m not sure if I can help you It is recommended to post it on the Storage and Transportation Forum. In refinery design, gas tanks are under the responsibility of the storage and transportation department; in some refineries, flares and gas tanks are also part of the oil products workshop
We use gas tanks with a capacity of 20,000 M3; the pressure inside these tanks is 300 mm of water column. The pressure of the gas inside must always be kept at a positive level. The pressure of high-pressure gas is 200–500 mm of water column, while the pressure of low-pressure gas remains at 50–100 mm of water column (based on 1 standard atmosphere): victory:
Are there any requirements for the inlet pressure of a wet gas holder?