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  1. takiyasamsama

    UG-34 SKETCH (N)

    Anyone had any experience designing pressure vessel with flat head according to UG-34 Sketch (n)? If yes, could you share what is your design consideration, especially for the threaded ring design.
  2. takiyasamsama

    Pressure Loss Across V/L Separator

    Hi, I'm designing my own refrigeration system (NH3) where currently on designing the separator/receiver. I am familiar with pressure vessel and heat exchanger sizing but that as a mechanical engineer scope. Now, I need to do sizing and study of the V/L separator downstream of the expansion...
  3. takiyasamsama

    KBC PETRO-SIM - How to generate properties for heat as per HTRI

    Dear All, How do I generate properties (heat properties with enthalpy at each point) in KBC Petro-SIM? Something similar like below. In KBC Petro-SIM, I don't usually use the heat exchanger for generating these table, I only use the stream function to generate properties since I only want to...
  4. takiyasamsama

    HVOF/TSA Coating -vs- Special Paint/Coating System

    Hi, In comparison between HVOF/TSA coating and painting, I need to know is there any alternatives to HVOF/TSA like using special painting/coating system? I see that HVOF/TSA is the ultimate solution when dealing stress corrosion chloride (SCC) when applied on carbon or stainless steel body...
  5. takiyasamsama

    U-Stamp Pressure Vessel Work Process

    Hi, I'm unclear of how the actual pressure vessel with U-stamp process? I mean I know that the design will be reviewed and approved by ASME AI, but what are the overall scope of the AI? Does the AI only review and approved the design? or will the AI witness any fabrication process? Some says...
  6. takiyasamsama

    Does saturation temperature similar to vapor-liquid equilibrium?

    As water boils at around 98.9 degC or 100 degC at 1 atm. During that phase change, the vapor fraction increases and liquid starts to reducing. Does the increase and decrease of vapor and liquid respectively is called vapor-liquid equilibrium (VLE)?
  7. takiyasamsama

    How to find density, enthalpy, thermal conductivity, specific heat and viscosity of separated phase

    georgeverghese, That is what we usually did. We would go and ask client for complete vapor-liquid enthalpy so that we could determine the true LMTD for the heat exchanger. Common response we get "don't you know how to determine the LMTD?". Following this, we would usually ignore these kind of...
  8. takiyasamsama

    Partial 2-phase properties from separate liquid vapor properties

    PaoloPemi, you sir are very helpful. Thank you, I'll try your excel sheet and see the result. Yes, basically (I think) I'm had to look for specific enthalpy because after I find the H(mixture) at specific temperature points, I had to make a cumulative enthalpy and from there multiply each...
  9. takiyasamsama

    Partial 2-phase properties from separate liquid vapor properties

    Hello PaoloPemi, The H(mixture) = H(Vapor) + H(Liquid) as you mentioned; I got the calculated duty closed to the required duty. I also tried another method which H(mixture) = [wt. fraction (vapor) x H(vapor)] + [wt. fraction (liquid) x H(liquid)] and I get really close duty to the required...
  10. takiyasamsama

    Partial 2-phase properties from separate liquid vapor properties

    I need to find the properties of a stream which is in two-phase. I'm only given separate properties i.e. liquid and vapor properties. I need to find the enthalpy for the two-phase mixture from the liquid and vapor enthalpy. See the table below: I would really like to know how do I find...
  11. takiyasamsama

    Raised Face Diameter Basis - Ratio or Rule of Thumb

    KernOily, we did a cost evaluation and inclusive of the overhead and all other costings and in where I am now, manufacturing custom flange by ourselves if much more cheaper and as for the gaskets we know it had to be custom gaskets and that's one of our business that end-user/customer had to buy...
  12. takiyasamsama

    Raised Face Diameter Basis - Ratio or Rule of Thumb

    When designing a pressure vessel for heat exchanger you may never know what size you'd ended up with. If the size is within that in B16.5 then we could use the nearest size flanges but when the size exceed 24" (DN 600) then definitely B16.5 is out of the picture. Yes I may go for 16.47 Series A...
  13. takiyasamsama

    Raised Face Diameter Basis - Ratio or Rule of Thumb

    I'm trying to find the ratio because I'm designing a custom sizes flanges, some says just use gasket seating width for the diameter of the raised face or just add 2 mm. Just wondering if there are any practical rule I could use
  14. takiyasamsama

    Raised Face Diameter Basis - Ratio or Rule of Thumb

    I tried looking into B16.5 and ASME VIII Div.1 Appendix 2 and there are no mentioned what are the basis to determine the raised face diameter. Is there any general rule of thumb to determine the basis of the raised face diameter? The only close thing I found on ASME VIII Div.1 Appendix 2 is...
  15. takiyasamsama

    How to find density, enthalpy, thermal conductivity, specific heat and viscosity of separated phase

    Hi Latexman, Basically I have two separate properties for liquid and vapor. Each separate phase have it's own physical properties along with molecular weight. I wanted to know how do I determine a mixture properties from these separate properties. For example, what I had in mind previously is...
  16. takiyasamsama

    How to find density, enthalpy, thermal conductivity, specific heat and viscosity of separated phase

    Hi, I'm not familiar with chemical process engineering, I need advise and help on how do I determine the density, enthalpy, thermal conductivity, specific heat and viscosity of separated vapor and liquid phase. I'm designing heat two-phase stream heat exchanger and I need to use mixture...
  17. takiyasamsama

    Heat Exchanger Sizing Using Specific Heat Capacity on Inlet Side Only?

    Hello, I never got this question from any client, but aren't we always calculate the duty of each process using Q=m x Cp x dT and this Cp we would usually used average between inlet and outlet? We received one question why are we calculating our duty using ONLY inlet side of the specific heat...
  18. takiyasamsama

    What determines boiler saturation temperature?; Feed pump discharge pressure or others?

    Dear gentlemen, I truly appreciates your inputs and answers. From all the responds, what I now understand is for example I needed 30 barg steam (boiler outlet) therefore I would need a BFP (boiler feed pump) of at least 40 barg or 50 barg? When it is said that pressure loss in boiler is far...
  19. takiyasamsama

    What determines boiler saturation temperature?; Feed pump discharge pressure or others?

    Hi, I am very new when it comes to boiler system, design and construction but I knew a bit of steam generation. What interest me is what is the operating pressure of the boiler? Does it the same as discharge pressure of its feed water pump? For example for heat exchanger, when the inlet...
  20. takiyasamsama

    Help : HYSYS Properties of Liquid-Aqueous Mixture

    Thanks rense, I agree that the best thing would just consult with client but my client told that they are having 3 phases at the exit terminal. Okay, the unit we're about to design is a crude oil heater and the oil at the beginning (inlet) only consists of water and crude oil thus the liquid...

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