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  1. vessexst

    Two phase separator internal baffle plate

    Thank you all for your feedback!!
  2. vessexst

    Two phase separator internal baffle plate

    @little inch: It is basically used to hold the liquid to a level of 1.8 metres to achieve separation through hold up Have never performed calculations before. However, want to do since the height of plate is 1.8 metres and need to check for hydrostatic forces impact on this plate and the...
  3. vessexst

    Two phase separator internal baffle plate

    Hi all, I want to ask a question related to internal welded baffle plate for a two phase separator. In order to calculate the plate thickness, I have currently used formulas available for rectangular plate of a tank given in Megeysey pressure vessel handbook Is my approach correct? Is there...
  4. vessexst

    Eccentric reducer on pressure vessel

    @r6155: The reinforcement is required under external pressure in order to satisfy the required moment of inertia requirements. The available moment of inertia without stiffeners is less. @snTman: I have actually also done manual calcuations. I did not see any discrepancy between PV Elite and ASME
  5. vessexst

    Eccentric reducer on pressure vessel

    @r6155: Apex angle is 7 Degrees Thickness = 6 mm
  6. vessexst

    Eccentric reducer on pressure vessel

    It is just that weld seam to seam distance is vsry less However, this is the max distance permitted by ASME. If anyone has a similar experience, kindly tell. @r6155: Actually, I am doing it on PV ELITE. It takes UG 36 and App 1-5 as its basis. But, is there anything ASME specifies in case of...
  7. vessexst

    Eccentric reducer on pressure vessel

    Hi all, I am designing a vertical vessel. Design P = 150 Psig Design temp = 150 Deg C MOC = SA 516 70N There are two shells of ID 36" and 30". These two are connected via an eccentric reducer. I need to put two stiffener rings at both the large and small ends in order to satisfy reinforcement...
  8. vessexst

    High temperature S&Tmaterial

    @r6155: Can you please share the clause where I should read it again? I read it at many places in ASME Sec II, part A that 327, 347 and some other grades shall be exposed to stabilization treatments. However, it's just like, I want to convey a client that these are stabilized and unatabilized...
  9. vessexst

    High temperature S&Tmaterial

    @r6155: I looked into ASME Sec II, Part A. It does explicitly classify stabilized and unstabilized grades @iron metallurgist: Ohhh
  10. vessexst

    High temperature S&Tmaterial

    Moreover, as per UCL 34, it gives an advisory note for "unstabilized" Austenitic steels. I did some research and found out that 321 and 347 are "stabilized" grades. But, I dont know where does ASME code classify grades to be "stabilized" and "unstabilized" Can anyone tell??
  11. vessexst

    High temperature S&Tmaterial

    @weldstan Oh I see. Means, apart from mandatory pwht requirements as per ASME Sec VIII, Div 1, there no other heat treatment requirements for the use of Austenitic SS materials as per NACE MR0175
  12. vessexst

    High temperature S&Tmaterial

    @weldstan: You are right. However, we had preferred P91 then due to its higher allowable stress. The H2S in the stream is about 2gram mole%. Can you specifically tell me wherecare the hardness requirements for 304L , 321 and 347 mentioned in NACE. I could not locate them
  13. vessexst

    High temperature S&Tmaterial

    @edstainless steel: Regarding what @waliq asked about 321/347, is there a limit of temperatures in NACE?? If so, even 304L might not work since the deisgn temperature is 400 Deg C in his case and 480 Deg C in my case And can Austenitic steels only be used upto 160 Deg F as per the attachment of...
  14. vessexst

    High temperature S&Tmaterial

    My question now is whether this P91 grade is suitable for sour service or not. Since, I did not find it listed in NACE MR0175 standard
  15. vessexst

    High temperature S&Tmaterial

    @edstainless steel Yes. NACE MR0175 defines low alloy steel as having 5% alloy element. But,I think this material is not covered under NACE MR0175. I have checked the specific alloy designation and P No.in NACE standard and I could not locate one. However, you are saying that used to buy P91...
  16. vessexst

    High temperature S&Tmaterial

    I think this material is not covered by NACE. It has an alloy designation of K90901 and P No. 15 E Can anyone confirm this understanding?
  17. vessexst

    High temperature S&Tmaterial

    Hi all, We are designing a high temperature S&T exchanger having the following design conditions Shell side Design P: 2.5 Bar Design T: 160 Deg C Tube side Design P: 2.5 Bar Design T: 480 Deg C We used the following materials for tube side owing to high temperature Channel shell: SA 387...
  18. vessexst

    Vertical exchanger strip type baffle

    Hi all, Can anyone share a real time picture of baffle arrangements for a vertical heat exchangers. How is bottom most held in its place by using strips on baffle plates and strip type support plates?
  19. vessexst

    Post fabrication heat treatment of cold formed SS 316L head

    @XL83NL: I did not find in UHA 44, if PFHT is required for a head formed of SA 240 316L plate when the EFE elongation is 15% or 25% for example. What I interpret from table UHA 44 is that there is no PFHT required for SA 240 316L (NOT 316), for any percentage of strain calculated as per UG 79...
  20. vessexst

    Post fabrication heat treatment of cold formed SS 316L head

    @XL83NL: I have reviewed it but did not find about 316L. Share if you know about any such requirement

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