High-acid, high-sulfur material selection; corrosion margin

2018-04-24View Original

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Hello everyone. The accompanying drawings are taken from the \"Guidelines for Material Selection in the Design of Equipment and Piping for High-Acid Crude Oil Processing Plants\" SH/T3129-2012. My questions: 1. If the crude oil is high in acid and sulfur content, then which chart should be used to calculate the corrosion margin? Figure A.1 shows only the corrosion rate in high-temperature sulfur, without taking into account a highly acidic environment ； 2. For delayed coking units, do the high-temperature equipment and pipelines downstream of the coke tower only require consideration for high-temperature sulfur corrosion? (The temperature in the coking furnace can reach around 500°C.) The question might be a bit off-topic; please give me some guidance!

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High-acid, high-sulfur material selection; corrosion margin

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