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    Wer H2S at elevated temperatures debate

    We are not creating all things from scratch, but each plant has its own case, withs its specific feed composition that would alter the material selection. I use all the above standards for my design, but I noticed that all of these standards for HCU does not specify wet H2S cracking without...
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    Temper Embrittlement(TE) 2.25 Cr 1 Mo steel P22/F22

    Actually one of the main methods to determine the extent of temper embrittlement is to add a test block inside the equipment (for example reactor heads) then we take a piece from it and make an impact test and take the results from API 571 or API 934-A. Controlling J factor for base metals and X...
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    Wer H2S at elevated temperatures debate

    Thanks Mr. Jones
  4. H

    Wer H2S at elevated temperatures debate

    Thanks Mr Jones for elaborative response, I would agree with you that for any cracking damage design conditions shall apply. However, the client specification enforces us to only utilize the maximum operating condition, even after we discussed with them, they said follow our specification! I...
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    Chloride criteria in MR0175/ISO 15156-3 for austenitic stainless steels

    Because it relies in absence of oxygen ingress, so no probable cracking may happen at temperature of 60 degrees C max. as I remember. However, that won’t exempt you from pitting corrosion that would happen through the brine liquid you will have, that’s why, even if the NACE tells you, it won’t...
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    Wer H2S at elevated temperatures debate

    Yes indeed it is in the design stage. Btw, is it not recommended to work on the max operating conditions? The client always asks about the reasoning behind, due to cost optimization
  7. H

    Wer H2S at elevated temperatures debate

    The funny part is not water flow or aqueos phase present as per their model due to the temperature or unsaturation, so the process cannot give me a value because there is no aqueos phase present during operation
  8. H

    Wer H2S at elevated temperatures debate

    Hey Ed, the document is the heat mass balance coming from the process system as per their model or software we can say, it mainly says no H2O based on dew point and relative humidity to check the saturation
  9. H

    Wer H2S at elevated temperatures debate

    Any thoughts guys?
  10. H

    Wer H2S at elevated temperatures debate

    Hey guys, I am having today three scenarios entitling the wet h2s cracking consideration: 1- I am having a stream at HCU operating at 230 Deg C and pressure of 2200 psia, with water fraction of 0.38% but as per the heat mass balance no liquid H2O flowrate is present, so shall we consider wet...
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    NACE Requirements for completely Cladded pressure vessel in severe sour stream

    Great! I would agree with that, because complete cladding is totally isolating the backing metal from the inside service. Even the produced hydrogen as a corrosion reaction product, won’t be able to reach the backing steel because it would be difficult to pass the interface between the clad and...
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    NACE Requirements for completely Cladded pressure vessel in severe sour stream

    This is the thing, our client spec did not mention anything in that regard, so they are keeping it open for the design company. Yesterday I checked their old projects, they only specify NACE requirements from chemical comp. and hardness only for the cladding not the backing CS. I was thinking...
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    NACE Requirements for completely Cladded pressure vessel in severe sour stream

    Hey everyone, I am honored to join you here. I am a materials engineer, I had project having 3 phase separator projects in GOSP, so this separator is totally cladded from as per my selection based on the severity of sour medium based on NACE 8x194 category evaluation. So based on API SP...

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