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For a small storage tank, is an H2S or sulfur content of 0.2 wt% in the medium considered a wet H2S corrosion environment? Is a corrosion margin of 3 appropriate?
A corrosion margin of 3 is appropriate; whether it is suitable still needs to be determined by checking against HG 20581 item by item
The wet H2S corrosion environment only provides limited benefit for C2
The tank is lined with plastic or rubber to make it more durable