Regarding Ammonia Leak Detection Test Method B
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How can a test pressure of 1.0 Mpa and an ammonia concentration of 10% be achieved? Should vacuum be applied first? Should ammonia be added to 0.1 MPa first, and then nitrogen to 1 MPa? Is this the correct way to do it? According to the standards, the vacuum level should be reduced to 20 kPa. Does this 20 kPa value have any impact? Or should ammonia be added first to 0.12 Mpa, and then nitrogen added to 1 Mpa? Thank you all
0.1Mpa, 0.9mpa – why is 1Mpa required for nitrogen?