Understanding of severely corroded equipment and pipelines
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Experts came to the factory for an inspection and suggested that, in accordance with Section 4.10.5.4 of the \"Guidelines for Safety Management of Chemical Process Operations\" (AQ∕T 3034-2022), enterprises should install online corrosion monitoring systems as well as adopt offline detection methods for equipment and pipelines suffering from severe corrosion, and regularly analyze the results of such monitoring； The inspection frequency for key areas should be increased, with regular assessments of the anti-corrosion effectiveness and calculations of the remaining service life of the equipment. ”. . . Our company uses corrosive hazardous chemicals such as chlorine and phosphorus trichloride in its reaction equipment and pipelines; therefore, it is necessary to install online corrosion monitoring systems on the reaction vessels and pipelines. . . I believe “severely corroded equipment and pipelines” refers to a condition in which corrosion has already occurred (for example, inspection results of pressure vessels or pressure pipelines show severe corrosion, but they are still within safe operating limits), and an online corrosion monitoring system needs to be installed. Instead, online corrosion monitoring systems must be installed on reaction equipment and pipelines that are not subject to corrosive hazardous chemicals. . . . I’m not sure if this understanding is correct; I hope the experts on this forum can give me some guidance. Thank you!
Your understanding is correct. Equipment and pipes with severe corrosion refer to those that have already shown signs of corrosion. In accordance with the requirements of the Guidelines for Safety Management of Chemical Processes, enterprises should install online corrosion monitoring systems on these severely corroded equipment and pipelines, adopt offline inspection methods, and regularly analyze the monitoring results. Although your company uses hazardous chemicals in corrosive reaction equipment and pipelines, this does not mean that such equipment and pipelines must be equipped with online corrosion monitoring systems. An online corrosion monitoring system is only necessary when these equipment and pipelines have suffered severe corrosion. Of course, as a company, in order to ensure production safety and the proper operation of equipment, it can proactively take certain anti-corrosion measures for reaction equipment and pipelines that use corrosive hazardous chemicals, and conduct regular inspections. If corrosion is detected, appropriate measures should be taken promptly to prevent further progression of the corrosion. .
Thank you for sharing; I look forward to communicating with you.
Extensively speaking, it can also include equipment pipelines with a very high corrosion rate, such as those that corrode by more than 0.5 mm per year