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With an eye to obtain more conservative assess
results for pressure equipments, three subjects will
be differentiated between the evaluation of
corrosion rate, failure probability of pressure
vessels and pressure safety valve (PSVs) in this
book. First, a statistical methodology was proposed
to modify the assessment of estimated corrosion
rates for the pressure components in conventional
methodology. Furthermore, the estimated corrosion
rates will be used to assess the failure probability
of the pressure components. By adopting First Order
Second Moment (FOSM) method, the failure probability
is approached for the pressure components. Moreover,
for the sake of optimize the inspection and
maintenance resources, typical semi-quantitative
risk based inspection (RBI) methodology to each
pressure vessel are proposed in safety management
based on the approached failure probability.
Besides, the final protection for the pressure
equipments when the pressure systems were upset -
PSVs, are also play important roles to safety
management for pressurized system. So, follow the
semi-quantitative RBI methodology, the evaluation
schemes and the suggested inspection interval were
established.

Pressure System Management Techonology: Application of Statistical Methodology on Monitoring the Failure Conditions of Static Equipments in the Petroleum Process