High temperature and high pressure safety valve leaks? How much pressure does the safety valve have?

High temperature and high pressure safety valve leaks?
The requirements of various standards for the sealing performance of high-temperature steam safety valves are generally that there is no obvious visible smoke, which is considered to meet the requirements. It is generally not a problem to have a small amount of gas in the on-line safety valve. It is best to install an emptying pipe to direct the steam to a safe area.
The safety valve is generally carried out at room temperature and the medium is compressed air. Mainly depends on the setting performance and sealing performance of the safety valve. The working conditions at the time of the test are not as bad as those on the line, and the sealing performance is easier to satisfy.
How much pressure does the safety valve have?
Low pressure safety valve: safety valve with nominal pressure PN≤1.6Mpa
Medium pressure safety valve: safety valve with nominal pressure PN2.5~6.4Mpa
High pressure safety valve: safety valve with nominal pressure PN10.0~80.0Mpa
Ultra high pressure safety valve: safety valve with nominal pressure PN>100Mpa