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  1. Muhaka22

    thickness loss evaluation- ASME VIII Div 1 vessel with 0 design corrosion allowance

    Thank you for your responses, @FacEngrPE and @JStephen . Can you please guide on the relevant section of the code dealing with such issues? I am not from the US, and haven't used the code before.
  2. Muhaka22

    O rings compatibility for DEU exchanger

    @georgeverghese If we assume that the lower end temperature is not an issue, and that the m-factor of the new o-ring material is same, can the o-ring material be changed without performing any Div-2 gasket design calculations?
  3. Muhaka22

    Using SS bolts on CS

    B7 material is usually sufficient
  4. Muhaka22

    O rings compatibility for DEU exchanger

    Dear All, A high pressure ASME Div 2 DEU-type exchanger has silicon o-rings in the channel head cover. We need to evaluate change of service of the exchanger from syn-gas to liquid ammonia (@ same pressure/temperature). Silicon is not suitable for ammonia service. Can I just replace the...
  5. Muhaka22

    How to determine whether a nozzle n

    As per compress software calculations, for div 1 , the relevant sections for nozzles are: > UG-37, UG-40 : for reinforcement Area Calculation > UG-41, UW-16, UW-15: Loading on welds > UG-45, UG-27: Nozzle Thickness
  6. Muhaka22

    thickness loss evaluation- ASME VIII Div 1 vessel with 0 design corrosion allowance

    I just want to confirm if this approach is correct. Can the original code be used this way , or is an API 579 FFS assessment necessary once the corrosion allowance (if any) of a vessel is exceeded?
  7. Muhaka22

    thickness loss evaluation- ASME VIII Div 1 vessel with 0 design corrosion allowance

    An ASME VIII Div 1 vessel with 0 design corrosion allowance has thickness loss on the shell and nozzles. >Can I calculate the minimum design thicknesses of these components using the original year 1995 design code and then use these as an additional margin compared to the actual vessel...
  8. Muhaka22

    Load combinations for old italian UNI codes

    Hello all. I am working on modification of an existing structure made in the 1970s, designed on old Italian CNR UNI 10011/12, seismic DM-1975 codes. Does anyone have an idea of the load combinations for these codes?
  9. Muhaka22

    Asset integrity management system

    Dear All, My company (large ammonia/urea plant) is evaluating implementation of an Asset integrity management (AIM) system. We have already been using SAP for 10+ years. Is SAP good enough for AIM or are other services like Meridium , VAIL etc better? I'll be grateful if you can share...
  10. Muhaka22

    Remaining life assessment of ammonia plant waste heat recovery boiler

    Dear All, An ammonia plant waste heat recovery boiler (consisting of 3 exchangers) has been in service since 30 years. The first leakage incident happened recently with a tube pinhole leakage that was plugged successfully. Recent inspection reports show •first exchanger: 20 Tubes with wall...
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