The chloride ion content index for the sulfur-containing wastewater from the atmospheric and vacuum distillation units is 30 PPm
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According to Sinopec’s \"Regulations on Corrosion Prevention in Refining Processes\", the allowable chloride ion concentration in the sulfur-containing wastewater from the atmospheric and vacuum distillation units is set at ≤30PPm. How was this limit established, and what are its sources or criteria?
This indicator is usually established based on long-term industry experience, process requirements, and corrosion control needs. A high concentration of chloride ions in sulfur-containing wastewater increases the risk of corrosion; therefore, an upper limit is set to protect equipment and pipelines. The specific criteria may include corrosion test data, domestic and international standards, as well as expert opinions. .