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  1. BasakAbhishek

    Shell forming method with low out of roundness for thin shell

    if I knew what to do..would I have come to this forum?..... and no "go to a shop" is not helpful at all
  2. BasakAbhishek

    Shell forming method with low out of roundness for thin shell

    if a tube and pipe shop can handle 2m dia shells of Inconel 625 and can draw them through a die then it must be the best in business with huge presses and thousands of square metres in floor space...and if I could have taken the drawing to a shop, then is there any need for posting the question...
  3. BasakAbhishek

    Shell forming method with low out of roundness for thin shell

    mfgengear I mentioned the dimensions, 2m ID, 6mm thk, 2m long..its obviously not a pipe and cannot be drawn though a die...
  4. BasakAbhishek

    Shell forming method with low out of roundness for thin shell

    Hello, My job requires forming a shell of Inconel625 of 2m ID, 6mm thickness, 2m long. The permissible out of roundness is 0.25%. Any idea how this can be achieved? Is there any other method other than a pyramid roller (maybe like forming on a carbon steel "mandrel"? Thanks Abhishek
  5. BasakAbhishek

    Typical cylindricity of shells made by plate rolling

    ID: 1750mm,t=25mm,matl: Hastelloy-C
  6. BasakAbhishek

    Typical cylindricity of shells made by plate rolling

    Hello, What is the typical expected cylindricity (on the ID) of a shell prepared by rolling a plate? UG-80 only talks about the difference between the maximum and minimum inside diameters at any cross section. It doesn't talk about the cylindricity. Any idea? Abhishek
  7. BasakAbhishek

    Sizing of concentric collector for diffuser pump

    yes
  8. BasakAbhishek

    Sizing of concentric collector for diffuser pump

    I meant the space after the diffuser and before the casing of the pump. This is marked by a red arrow in the attached file.
  9. BasakAbhishek

    Sizing of concentric collector for diffuser pump

    Which edition are you refering to? I am having book by Karassik, Messina, Cooper and Heald, 3rd edn..by the same name,,it doesnot have these chapters
  10. BasakAbhishek

    Sizing of concentric collector for diffuser pump

    Hello, Where can I find any thrumbrule for determine the sizing (specifically the cross section area) of a concentric collector in a pump with a diffuser? Thanks! Abhishek Basak
  11. BasakAbhishek

    Sealing of gases by lip type seal

    Hello ...thanks for the answers! If not a lip seal what other options do I have. My shaft is ~30mm dia, rotating at 2700 rpm.
  12. BasakAbhishek

    Sealing of gases by lip type seal

    Hello, Is it possible to have a reasonable level of leak tightness if a lip type seal (with grease lubrication) is used in a vertical shaft to seal against argon at 0.5 bar(g)? Thanks! Abhishek
  13. BasakAbhishek

    Estimation of torque in stuffing box of pumps

    dtimberlake Yes the gland is adjustable
  14. BasakAbhishek

    Estimation of torque in stuffing box of pumps

    Hello Efendy! Thanks for the very precise reply!.. In my application the stuffing box is on a vertical shaft and sealing against an argon gas environment which is very near to atmospheric pressure..I understand that stuffing box pressure is nearly equal to the process pressure, but is there any...
  15. BasakAbhishek

    Estimation of torque in stuffing box of pumps

    Hello, Does anybody know how to estimate the shaft torque required for a stuffing box, using self lubricated graphite packing? Abhishek
  16. BasakAbhishek

    Single phase vs two phase system for heat removal

    Hello, I have to design a heat exchanger with variable load such that the outlet temperature of the shell side (gas at high pressure) is maintained at constant temperature. I have two options: [Option1] Use single phase water on the tube side and control the shell side outlet temperature by...
  17. BasakAbhishek

    Corelations for predicting the surge point of a blower

    Hello, I am in the process for designing a blower from scratch for a very special service condition which is generally not met by commercial blower manufacturers. I would like to know if there are any correlations/theoretical techniques that can predict the surge point for a given impeller...
  18. BasakAbhishek

    Way to calculate HTC on tubesheet

    georgeverghese .. thanks for idea!..I was wondering if there is any correlation for heat transfer from a flat plate on which a number of cylinders are arranged perpendicular to the plate in an array...like tubes emerging from tubesheet. Abhishek
  19. BasakAbhishek

    Way to calculate HTC on tubesheet

    Hi..which section of which book? I don't think you can find this in any standard heat transfer book. Abhishek
  20. BasakAbhishek

    Way to calculate HTC on tubesheet

    Hello, Is there any way to calculate the heat transfer coefficient at the shell-side surface of a tube-sheet in a shell and tube type Hx? Of course CFD is one option, but is there any easier alternative? Abhishek

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