Steel containment vessel air tightness test system

The invention discloses a steel containment air tightness test system, and relates to the field of detection. The steel containment vessel air tightness test system comprises an air inlet pipeline, a superposition leakage pipeline, a pressure relief pipeline and a data acquisition and analysis system which are respectively communicated with a containment vessel, and the air inlet pipeline, the superposition leakage pipeline and the pressure relief pipeline are respectively provided with an air inlet adjusting valve, a leakage valve and an exhaust valve. The data acquisition and analysis system comprises a plurality of pressure sensors, a plurality of temperature sensors and a plurality of humidity sensors which are arranged in the containment, and a data analysis computer which is electrically connected with the pressure sensors, the temperature sensors and the humidity sensors respectively. The steel containment vessel air tightness test system provided by the invention can quickly and efficiently detect and