Regarding the installation of pressure relief manholes on small nitrogen-sealed storage tanks
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According to 3007, the nitrogen-sealed storage tanks in the tank farm require a DN500 pressure relief manhole. However, the initial volume of tank 3007 is 100 cubic meters. For smaller tanks with volumes of 20 or 35 cubic meters, can a safety valve be used in place of a pressure relief manhole?
According to standard 3007, nitrogen-sealed storage tanks do require the installation of a DN500 pressure relief manhole, which is typically applicable to larger storage tanks. For storage tanks with a smaller capacity, such as 20 cubic meters or 35 cubic meters, it is possible to use safety valves in place of pressure relief manholes, but this must comply with relevant safety regulations and standards. Typically, a safety valve must be able to open reliably at a set pressure to ensure the safety of the storage tank in case of overpressure. When deciding whether to use a safety valve in place of a pressure relief manhole, it is recommended to consult a professional safety engineer or relevant standard-setting organization to ensure that the alternative meets safety requirements. At the same time, it is also necessary to consider whether local regulations and standards permit such replacements. .
SH3007 standard: large tanks, using low-pressure or atmospheric pressure tanks, with pressure relief manholes in case of fire. For small containers, a safety valve or rupture disc can be used, but it is necessary to increase the design pressure and calculate the burst diameter.