Which maintenance method can effectively extend the life of equipment?

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Combined with the previous background on the embrittlement of oil refining equipment, maintenance after embrittlement and the impact on life, the following targeted maintenance methods can effectively extend the life of the equipment.: The precise local crack repair + stress relief process completely removes all micro-cracks caused by embrittlement, uses suitable high-toughness welding materials for repair welding, and simultaneously completely releases residual stress through post-weld heat treatment to avoid secondary stress concentration inducing new embrittlement, which can make the service life of the repaired part close to the level of brand-new components. Material toughness recovery heat treatment aims at tempering embrittlement damage. It adopts a process of short-time high-temperature tempering above 593°C and rapid cooling, which can reverse the embrittlement trend of materials such as chromium-molybdenum steel, restore the original impact toughness of the material, and greatly extend the remaining service life of the equipment. The anti-corrosion enhancement supporting repair is to apply a suitable epoxy resin anti-corrosion coating on the inner wall of the repaired equipment to form a physical isolation barrier to isolate the corrosive medium from contact and prevent the medium from inducing embrittlement again. It can also improve the exhaust gas adsorption efficiency, extend the overall service life of the equipment by more than 50%, and save about 800,000 yuan in annual maintenance costs. Local structural reinforcement modifications include lining and adding reinforcements in stress concentration areas with high brittleness, optimizing the stress distribution of the equipment, and reducing the probability of brittle recurrence from the structural level. This allows the equipment to operate stably for several years under the original design conditions, matching the overall overhaul cycle of the device.