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[MW:18707] Re: Why pressure drop occur even there was no leakage in hydrostatic test?

what if hydrotest made at 7pm and the given pressure is 5psi, after 11 hours of 6am, still reads the pressure 5psi, but at 9am, ie after 14 hours, Miter reading has dropped to 3.5Psi .. what is happening and its happening causes the condition?

On Friday, September 20, 2013 11:22:37 AM UTC+8, Mijiz Gruezy wrote:
Dear All,

Why pressure drop occur even there was no leakage in hydrostatic test?

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