Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. tepcor3

    corrosion in urea plants

    Dhandbad: the best materials I know are: - Superaustenitic stainless steel 25%Cr-22%Ni-2%Mo (UNS No. 31050, DIN 1.4466). Oxygen injection is necessary to induce pasivation in SS surfaces. Normally, 0,5-0,8%vol O2 in the CO2 feed. - Zirconium (R60702). Oxygen is not needed for the passivation...
  2. tepcor3

    corrosion in urea plants

    Ammoniumcarbamate: see - C.P. Dillon, "Carbamates can cause corrosion problems", Materials Performance, dec. 1999, p.74 - M.P. Sukumaran Nair, "Control corrosion factors in ammonia and urea plants", Hydrocarbon Processing, Jan. 2001
  3. tepcor3

    corrosion in urea plants

    Volvo90: our company is not a member of AMIChE. Please, let me know how to contact them.
  4. tepcor3

    corrosion in urea plants

    McGuire: please, let me know full references of the article of Sandvik (pitting attack on duplex SS . Thank you in advance.
  5. tepcor3

    corrosion in urea plants

    Mcguire: if the chart which you refer is that of A. J. Sedriks, "Corrosion of Stainless Steels", 1st. edition, Wiley&Sons (ca. 1979), p. 250, figure 10-10, this graph is for pressure range 12-34 bar. The high pressure loop of the urea plant works at pressure in the range 150-200 bar...
  6. tepcor3

    corrosion in urea plants

    Mcguire: The commercial synthesis of urea involves the combination of liquid ammonia and gaseous carbon dioxide in a reactor at high pressure (150-200 bar) and high temperature (180-190°C) to form ammonium carbamate, urea and water. Modern energy-efficient processes foresee the decomposition of...
  7. tepcor3

    corrosion in urea plants

    I am looking for information about the effect of the presence of H2S in CO2 gas feed in urea plants. Specifically, the value at what the H2S content should be lowered to avoid corrosion problems in the urea reactor, stripper, carbamate condensator, etc. Does anyone have information about this...

Part and Inventory Search

Back
Top