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  1. lovescroll

    PWHT at the existing piping and reactor for further preventing some HTHA

    Actually i won't prefer. At least i prefer a new one fabrication. But cost might be effective as well. So. I need to confirm that with the regeneration conditon like this (260 deg C with 350 psia of H2PP and non pwht carbon steel. Is it necessary to do pwht ?? Are there any curve like...
  2. lovescroll

    PWHT at the existing piping and reactor for further preventing some HTHA

    Thanks for clear discussion I actually agree with you all to not to take some pwht at the existing equipment and reduce some margin and increase some confidence rating instead. By the way we found that the new procedure of regeneration process will take a system to be 260 degree C for 48 hours...
  3. lovescroll

    PWHT at the existing piping and reactor for further preventing some HTHA

    Hello Our plant has a debottleneck project, they decided to increase the unit's operating temperature from 140 to be 200 degC at the partial pressure of hydrogen around 400 psia after reviewing all of condition with safety margin added, all of piping including reactor shall be done a PWHT, while...
  4. lovescroll

    Side effect of upgrading material

    i'm curious about the side effect of material upgrading. I currently found that my cooling exchanger was found some severe corrosion material was fabricated from carbon steel, life is less than 6 months. and we try in various way to improve the integrity like water wash injection and corrosion...
  5. lovescroll

    FFU Overhead corrosion

    Hello, now we found the overhead corrosion at aromatic plant that lead to the failure of cooling exchanger within 6 months (failure characteristic seems to be occurred at the outside to inside corrosion, Hydrocarbon flow at tube outside cooling water flow at tube inside) , at that position we...
  6. lovescroll

    Electric urns with drinking water

    Please help me to clarify this why electric urns didn't crack when exposed to boiled drinking water around 80-100C, i heard that it will be contained with XX ppm of chloride. Electric urns made from SS304 , that's all we know . and normally from manufacturing process it will definitely have a...
  7. lovescroll

    316ss vs 410ss for chloride environment

    Cl around 5000 pm temp. ambient (not higher than 50) pH 7-8 please
  8. lovescroll

    316ss vs 410ss for chloride environment

    which's one is better ?? in the chloride-containing environment i found that in term of PREN number 316ss is much higher than 410 but we always realize that the Austenitic ss isn't suitable for chloride contaning environment. So, i want to know whether martensitic ss is immune for a chloride...

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