Bare cooling of air separation equipment is a key debugging process that conducts low-temperature assessment of the equipment by introducing low-temperature media such as liquid nitrogen after the installation of low-temperature equipment and before filling with insulation materials, aiming to verify the performance and reliability of the equipment under extreme working conditions.
The technical purpose of bare cooling for air separation equipment is to verify the installation quality, expose potential defects in pipeline welds and flange connections through low-temperature environment, detect whether the leakage rate meets the standard (such as leakage rate ≤ 0.3%), and ensure the sealing of the equipment during long-term operation. 2. Evaluate the cold deformation capability, inspect the shrinkage rate, thermal stress distribution, and compensation ability of equipment and pipelines at extreme low temperatures, avoid cracking caused by material brittleness or structural stress concentration, and ensure the structural integrity of equipment under cyclic conditions from -196 ℃ to room temperature. 3. Ensure the smoothness of pipelines, verify the flow of internal pipelines, valves, and instruments of equipment at low temperatures, check for ice blockage, impurity blockage, or mechanical jamming, and ensure the continuity of subsequent process flows.
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