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  1. ione

    EN 13480-3; allowable stress determination acc. to 5.2.2-1

    I'd expect the tensile stress @20 °C and @ 35 °C to be almost the same. In any case the formulas reported in EN 13480-3 refer to Rp,1.0 and not Rp,0.2. As suggested by XL83NL, you could take a look to EN 15515-4, which as standard reference for X5CrNi18-10 (EN 1.4301EN) addresses to EN 10269...
  2. ione

    ASME B31.3 Wall Thickness - Y Coefficient Clarification

    The formulas reported in the standard are for thin walled cylinders. For thick cylinders you have another approach
  3. ione

    Fluid dynamics - Header pressure

    Mass flux varies linearly from the section 1 onward, as you are going to have part of the mass flow leaving the header at each branch. In order to have even flow distribution you have to minimize the pressure drop along the header in comparison to that of the branches.
  4. ione

    "Tks average" in heat exchanger specifications

    Thickness
  5. ione

    1.4122 pressure temperature rating

    jangolobow, Effect of pressure? I'm not clear what you mean specifically. You can use tables from EN 10088-3 where you can find mechanical properties of the material of interest at room and at different temperatures, but you're not going to find any mechanical properties vs pressure tables.
  6. ione

    Reynolds number for parallel plate fin heat sink

    I suggest you to put your hands on the literature quoted in the references. The definition for the modified Reynolds number is: Re(mod) = Re* (b/L) For a high aspect ratio (high H/b) the hydraulic diameter is: Dh = 4A/P = 4 (H*b)/[2(H+b)] ≈ 4H*b/(2H) = 2b There’s anyway a difference by a...
  7. ione

    Flow Orifice Plate "factor"

    Take a look at the following link (reference is ISO 5167-1) https://nfogm.no/wp-content/uploads/2019/02/1996-24-The-Orifice-Plate-Discharge-Coefficient-Equation-Reader-Harris-NEL.pdf
  8. ione

    Vertical Vessel Orifice Drain Impacting Inclined Surface Force Calculation

    F=rho * Q * delta(v)
  9. ione

    Fatigue properties of 17-4PH Cond A?

    https://www.asminternational.org/web/ims/resources/-/journal_content/56/10192/META3306P1715/PERIODICAL-ARTICLE
  10. ione

    Increase fluid temperature after a throttling valve

    Maybe you can find something useful at the link below https://www.eng-tips.com/viewthread.cfm?qid=265066
  11. ione

    ASTM Equivalent material for Boiler Air Pre heater Tubes

    ASTM A 106 gr. B
  12. ione

    Pipe size adjustment with pulp consistency

    Not my field of expertise, anyway the attached file could give you some guidancehttp://files.engineering.com/getfile.aspx?folder=3f36e29a-a376-4d16-8ec1-c817de9391b9&file=TAPPI-TIS410-14.pdf
  13. ione

    condensate temperature

    You have to calculate the back pressure on your condensate line (0.5 bar for height difference + pressure drop due to friction from the steam trap to the tank + pressure drop due to fittings). Then use steam tables to evaluate saturated liquid temperature. Please note when sizing condensate line...
  14. ione

    CFX heat transfer coefficient vs theoretical value

    First thing L K, First thing. Do you know for sure the correlation used by CFX is the one reported by Incropera? Using Churchil & Ozoe correlation for constant heat flux case and with your data I got h = 5,4 W/(m2 K). Take those correlations for what they are, namely best fit of experimental...
  15. ione

    Vortex breaker for pump suction in floating skimmer

    HI 9.8 and specifically para 9.8.7.2 reports the following relationship: S/D = 1.0 +2.3Fd where: S = submergence D= Inlet O.D. Fd = V/(gD)^0.5 Froude number g = Acceleration of gravity V = velocity at inlet bell face With your numbers S is slighly more than 8"
  16. ione

    Super-heated condensate steam chimeny

    What are you probably making reference to is called flash steam. You can find some insight at the link below http://www.spiraxsarco.com/Resources/Pages/Steam-Engineering-Tutorials/condensate-recovery/flash-steam.aspx
  17. ione

    Help with fan test setup

    Jake, The file in the attachment can give you further insightshttp://files.engineering.com/getfile.aspx?folder=f50df09f-e609-4a29-a86b-4ab7ab861841&file=Eurovent_REC_1-11_-_Fans_and_system_stall_-_Problems_and_solutions_-_2007.pdf
  18. ione

    Help with fan test setup

    Rely on fan performance curve. Establish your system curve and find the working point of the fan. Try to build your system curve attentively to be sure you will operate your fan in a region far from the stall region indicated on the fan performance curve. With axial fans, which I tend to think...
  19. ione

    %mol - CO2

    MortenA, Your statement would imply all real gases have the same Z compression factor, which is not the case.
  20. ione

    Steam pipe thrust calculation

    Maybe 5000 fpm..... http://www.engineeringtoolbox.com/forces-pipe-bends-d_968.html

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