What should be done about existing process piping and equipment that is already in sour service? The system was rated for 30 ppm H2S. Now it may see 230 ppm H2S.
Scenario to study and possible options to comply with H2S requirement: an existing maximum anticipated H2S concentration is 30 ppm in the reservoir. The new system to be designed requires the maximum H2S design concentration is 230 ppm, even though the reservoir is not expected to become sour. So, to which we are to design to apply conflicting H2S design criteria.