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  • Users: etsen
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  1. etsen

    ClSCC in a hospital steam sterilizer with tap water

    Can Chloride stress corrosion cracking (ClSCC) occur in a hospital steam sterilizer with tap water. The steam sterilizer is made of 304 grade stanless steel. Thanks in advance. Operating temperature is 126 ºC Operating pressure is 1.4 MPa
  2. etsen

    Local metal loss assessment of piping elbows

    For a local metal loss assessment, the remaining life of piping elbows can be computed by using the method based upon computation of a minimum required thickness for the intended service conditions? For example, r=(t1-t2)/(2c) where r=remaining life,years t1 = the minimum remaining wall...
  3. etsen

    Can anhydrous ammonia cause erosion for piping?

    Can anhydrous ammonia ?vapor or liquid?cause erosion or corrosion for piping elbow and tee made of carbon steel or low alloy steel in refrigeration system?
  4. etsen

    How to inspect piping full of NH3

    The piping would be full of liquid anhydrous ammonia for some reasons when in-service inspections are conducted. So my question is how to inpect the piping? Thank you in advance.
  5. etsen

    How to inspect FRP pressure vessels

    what NDT technology or tools can be used for the integrity of FRP pressure vessels? And what recommendations would you like to provide for me when I inspect them from outside and inside. Are there some standards or codes in this field? Thanks in advance.
  6. etsen

    Differences between A335 P11 and A335 P22

    What are the differences between A335 P11 and A335 P22? For example, the allowable operating temperature for a design life of pipes. Thanks in advance.
  7. etsen

    Weight of Pneumatic Three-way Valve for Power Plant

    What is the weight of Pneumatic Three-way Valve for Power Plant? Some design data of the valve is following.PN=28.7MPa?t=270??DN=325mm. Thanks in advance.
  8. etsen

    How to inspect a glass-lined pressure equipment?

    I have three questions. 1.Does 'glass-lined' mean 'fiberglass-reinforced Plastics(FRP)'? 2.Are there standards or codes about FRP for pressure equipments? 3.How to inspect a glass-lined pressure equipment effectively? Thanks in advance.
  9. etsen

    The minimum allowable temperature for SA 516-70N

    Could anyone tell me the minimum allowable temperature for SA 516-70N and what standards or code I can refer to? Thanks a lot.
  10. etsen

    Corrosion of anhydrous hydrogen chloride

    Can anhydrous hydrogen chloride gas and liquid be corrosive to SA-333 steel and stainless steel at low temperature? Could anyone be kind to provide some references about them? Thanks.
  11. etsen

    Standards or codes about reheat crack of pressure vessels

    Are there any standards or codes about reheat crack of pressure vessels and metal materials in which reheat crack may happen after welding. Thanks.
  12. etsen

    Total pipe length in a piping isometric drawing

    In a piping isometric drawing, there are generally two values about total pipe length. And my question is that why the value in the upper right of the drawing can't be equal to the sum of each pipe length written in it. Thanks a lot.
  13. etsen

    Differences between F.V. and -0.1MPa and -0.0175MPa

    I find that the minimum design pressure of some pressure vessels is F.V. or -0.1MPa or -0.0175MPa. So I am confused and my question is that whether F.V.(Full vacuum) means -0.1MPa and what -0.0175MPa means? Thanks a lot.
  14. etsen

    Can steam at ~450C be corrosive to CS or SS?

    Can steam at ~450C be corrosive to carbon steel, low alloy steel or stainless steel? And it would produce creep of steel? Can steam decompose into hydrogen and oxyen? Thanks a lot.
  15. etsen

    Can API 5L GR.B SAW be equivalent to SA-53 ERW?

    Can API 5L GR.B SAW be equivalent to SA-53 ERW? If not, could anyone tell me the equivalent material to API 5L GR.B SAW? Thanks a lot.
  16. etsen

    A short straight piping with a cap is a dead leg?

    The distance between the cap and the branch pipe is about 700mm. So the straight pipe between the cap and the branch pipe is a dead leg? Thanks a lot.
  17. etsen

    Space between floating head and the head besides it

    As for a heat exchanger, is space between the floating head cover and the shell head besides it filled with medium same to the shellside? Thanks a lot.
  18. etsen

    n-Butane Oxidation Reactor cooled by molten salt

    Maleic anhydride (MA) is produced by n-butane oxidation in a salt cooled tube bundle reactor. Tubeside: n-butane and air. Shellside: molten salt. I want to know corrosion or other degradations of tubes (15Mo3,low-alloy steel)by the reaction of n-butane and air from tubeside and molten salt from...
  19. etsen

    Differences beween 15Mo3 and 16Mo3

    I am confused when it comes to 15Mo3 and 16Mo3 for seamless tube and shell of pressure vessel respectively, for both of their steel number are 1.5415. Could anyone explain for me or recommend some books or articles for me to read? And is there ASME steels equivalent to 15Mo3 and 16Mo3...
  20. etsen

    Reference book or handbook for corrosion rate

    Could anyone recommend reference books or handbooks or other available and believable materials about corrosion rate to determine corrosion allowance for pipe and pressure design? Thanks a lot.

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