Seeking help regarding the locations for anti-corrosion inspection and thickness measurement in the fluid catalytic cracking unit

The locations for corrosion prevention inspection and thickness measurement in catalytic cracking units mainly include the following areas: 1. Reaction and regeneration towers: inside the reactor, inside the regenerator, and inside the separator. 2. Main transfer pipelines: such as the pipeline from the reactor to the separator, and the pipeline from the separator to the regenerator, etc. 3. Main heat exchangers: such as coolers or preheaters associated with reactors and regenerators. 4. Other important equipment: such as desulfurizers, adsorption towers, compressors, etc. These areas are the ones most prone to corrosion and wear during the catalytic cracking process. In terms of frequency, a comprehensive measurement and inspection is usually carried out once a year. However, for some critical or high-risk areas, more frequent inspections may be necessary, such as every three months or six months. It should be noted that the specific thickness measurement points and frequency are determined based on factors such as the actual operating conditions of the device, historical corrosion data, and corrosion rate; therefore, a thickness measurement plan must be formulated according to the actual circumstances. .

Could everyone share where problems have occurred in the catalytic device due to corrosion?