To enhance the dependability of Plate Heat Exchangers (PHE) post-cleaning and gasket replacement, it is crucial to follow a comprehensive procedure during the reassembly process. Despite taking all necessary precautions, a plate exchanger experienced leakage upon startup after being cleaned and fitted with new original gaskets during a turnaround. Without the need for a shutdown, the leakage was rectified online by applying external sealant. Moving forward, what are the key steps to ensure the secure boxing up of plate exchangers following maintenance to avoid such incidents in the future? - Regards, Sajjad Hussain.
I have faced this issue in the past where consistent pressure is necessary for tightening bolts. To clean a scaled plate surface effectively, we rely on a specialized chemical that restores stainless steel's shine without causing damage. Additionally, we use a fluid medium, usually cooling water, to maintain optimal operating conditions for our two heat exchangers. Depending on specific operations or maintenance needs, these heat exchangers can be operated either in parallel or series.
Hi Sajjad, sorry to hear about the issue you faced. One important thing I'd like to mention is to always thoroughly inspect the plates for any corrosion, damage, or deformation during maintenance. These could undermine the effectiveness of the new gaskets. Also, paying meticulous attention to correct plate alignment and properly considering the tightening specifications while boxing up could prevent leakage issues. Remember to always double-check the integrity of the entire system before restarting operations, especially after heavy maintenance like cleaning and gasket replacement. It's always better to spend a bit more time on quality inspections rather than dealing with issues post-startup. Lastly, try to engage only experienced professionals to service and reassemble your plate heat exchangers. Hope this helps!
Hi Sajjad, leakage issues post-maintenance can be quite vexing indeed. To secure the plate exchangers, you may want to check the torque settings during reassembly. It's crucial to meet the manufacturer's recommended settings to ensure the gaskets are correctly compressed, enhancing their sealing abilities. Also, inspect the alignment of the plates and gaskets during reassembly as any misplaced component can lead to potential leaks. Finally, a hydro test before startup would help identify and fix any leaks. And just for future reference, always insist on certified personnel to handle the maintenance activities to minimize any human errors. They may be familiar with these prevention measures and may also provide valuable insights based on their experience.
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Answer: - It is crucial to follow a comprehensive procedure during reassembly to enhance the dependability of PHE post-cleaning and gasket replacement, which helps prevent leakage issues.
Answer: - Despite taking necessary precautions, leakage in a plate exchanger can occur due to improper reassembly or other factors, resulting in the need for online rectification using external sealant.
Answer: - To prevent leakage issues in plate exchangers during maintenance, it is essential to follow key steps to ensure secure boxing up, such as proper alignment, torque tightening, gasket inspection, and leak testing before startup.
Answer: - Key steps to ensure the secure boxing up of plate exchangers following maintenance include proper alignment of plates, correct torque tightening of bolts, thorough gasket inspection, leak testing, and adhering to recommended procedures for reassembly.
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