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  • Users: demsha
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  1. demsha

    Salt water disposal well corrosion - SAGD process

    Dear friends, I am working on the Well Integrity Management Program for SAGD wells. Can anyone suggests where I can find information on [highlight #FCE94F]corrosion of saltwater disposal wells? including casings and downhole tube[/highlight] Appreciated
  2. demsha

    How many times PWHT can be done

    Hello All; A pressure vessel was constructed with SA 516 Gr.70 has undergone PWHT initially in 1975. How many times the vessel could undergo repair & PWHT in its lifetime? Are there any maximum times can anyone do PWHT? Will metallurgical changes occur during subsequent PWHT? Where I can find...
  3. demsha

    UT crawler inspection of Duplex steel surfaces

    Dear All; Can anyone tell me, whether UT crawler could be used to measure the thickness of 2205 Duplex steel surface? Thanks in advance
  4. demsha

    Flag Thickness

    Hello All, Can anyone let me know; How to Calculate flag thickness in Pressure vessel and tank? Thanks in advance
  5. demsha

    In Service leak test after repair

    Hello All; We had an average size of repair completed on an internal attachment to shell of a pressure vessel. The defect area was ground smoothly and filled with proper weld procedure. Subsequently, the area was examined by 100% MPI. No defects were found. Hydro test was not done due to...
  6. demsha

    304 SS bulging

    Hello everyone, Vertical plates which supports downwards trend of the flow in digester (pulp and paper making) has been bulged. Those bulges are quite large. The plates made of 304L SS. The temperature in this area falls between 300 - 320 F. Can anyone tell me what was cause for bulging to...
  7. demsha

    fillet welding close to Cupro/nickel Tubes

    Hello everyone, I need to weld channels which hold the plate as shown in the picture to the Chiller support. The welding method is SMAW using 7018 rod. My concern, will there any damage to the CuNi 90/10 cooling tubes adjacent to welding of these channels? Appreciate for early response. Demsha
  8. demsha

    Steel Reinforcement Corrosion in Concrete

    Hi All; In some columns of my house the contractor has not cut off the excess reinforcement steel bars. They are sticking out of the column. I presume they will get rusted over time. My worry is; Could that rust penetrate inside the concrete? What should I do to prevent it from going inside? My...
  9. demsha

    Damage Factor in API 581

    Hello All, Can anyone tell me The Damage Factor described in API 581 could be used to identify the damage mechanism? Thanks for responses in advance.
  10. demsha

    Glycol Corrosion

    Hello All, Can any tell me, what type of damage mechanism could exits in Glycol heat exchanger? shell side: either heated or ambient temp. Glycol Tube side: Produced water, Blowdown water or Hydrocarbon (C7) Thanks in advance
  11. demsha

    Corrosion rates in Refinery Equipment

    Dear All, Does anyone knows where I can find (literature, journals etc.)possible corrosion rates in refinery equipment? At this tiime I am looking for corrosion rates in Distillate Hydrotreating Unit Thanks
  12. demsha

    SAGD facility

    Hi All, Can any tell me, what type of fixed equipment consists of a typical SAGD (Steam Assisted Gravity Drainage)facility? Thanks
  13. demsha

    Estimated corrosion rate from process sample

    Hi All, can someone tell me, how to estimate corrosion rate from process sampling and operating variables in refinery equipment? Gas absorber and Amine regenerator in amine unit and reactor vessel in Hydrotreating unit? Thanks in advance
  14. demsha

    carburizing problem

    Hi all, Which one of stainless steel is more prone to carburization Austenitic or Ferritic? Adding Aluminum will increase the carburization resistance? Thanks in advance
  15. demsha

    Least amount of Volatile Organic Compound in coating

    All, does anyone knows least amount of volatile organic compound exist in which coating technology below Nickel plating Magnesium flame spray Chromium carbide HVOF (high velocity Oxy fuel) technology I want to know correct procedure usually applies in automotive industry. Thanks
  16. demsha

    PWHT or Stress Relief

    Hello All, Is PWHT is mandatory or standard practice in transmission tower manufacturing industry? Thanks in advance
  17. demsha

    PWHT in Transmission Tower Manufacturing

    To All, Can anyone tell me PWHT is a standard practice in transmission tower manufacturing industry? Any references would be greatly appreciated.
  18. demsha

    Welding in Cold Weather condition

    Hello All, Our client is connecting two screw piles by welding a collar (sleeve) into it. However they were doing this welding when outside temperature was around -30 0C below. After our repeated screaming, contractor began to weld in a covered tent. Can anyone tell me where I can find answers...
  19. demsha

    Current density

    Hello All, I need to calculate output current of Mg anode which protects the pipeline. I know the area of the anode. Where can I find current density for Mg (magnesium) to soil? (we know the soil resistivity) Thanks for your help
  20. demsha

    Torque wrench Calibration

    To All; Does anyone knows reasonable interval between calibrations of a torque wrench in a construction site? Some company specifications call for calibration twice a day which is impossible. Thanks in advance

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