Emergency pressure relief manhole
Thread Content
Dear teachers, our company has a butyraldehyde storage tank with a capacity of 500 m3. It operates at atmospheric pressure and is equipped with a nitrogen seal as well as a vent valve. Now we need to add an emergency pressure relief device. I would like to ask if there are any specifications regarding the installation of such emergency pressure relief manholes, and how the pressure level for these manholes should be determined.
Emergency pressure relief manhole? ? ? It is possible to use safety valves, breather valves, etc. to create branch pipes, and emergency pressure relief valves can be installed on these branches; butterfly valves as well as other types of quick-acting valves (pneumatic valves controlled by solenoids) could be considered to see if they are suitable for this purpose.
The pressure setting of the pressure relief manhole is higher than that of the breathing valve, but lower than the safe design pressure of the tank.
The emergency pressure relief manhole is a rapid pressure relief device, and its technical specifications as well as the materials of its main components are identical to those of the breathing manhole. An emergency pressure relief manhole is a safety and emergency ventilation device installed on equipment and storage tanks in the petrochemical industry, etc. It is usually used in conjunction with a vent valve installed on the top of the tank to maintain normal pressure inside the tank, thereby preventing sudden overpressure or vacuum conditions inside the tank due to accidental reasons. Its pressure is higher than that of the breathing valve and lower than the design pressure of the container
Take a look at the \"Code for Design of Oil Depots\" (GB50074-2014); it contains very clear descriptions there
According to SH3007, storage tanks that are equipped with nitrogen sealing must also have a pressure relief valve; this represents the final level of protection for the tank, with the activation pressure being lower than the tank’s design pressure It generally needs to be higher than the breathing valve, after all, it’s not desired for it to open unless absolutely necessary!
How to understand the “emergency vent manhole cover”? Waiting online!
Is a storage tank with a nitrogen seal valve and a pressure relief manhole still a atmospheric-pressure storage tank?