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  1. demser

    carbamate corrosion at moderate T & p?

    Dear all, carbamate is known as corrosive agent in urea plants, where high pressure and temperature are applied. But what about mixtures of CO2,NH3, water at moderate temperatures (10 - 80°C) and moderate pressure (1 - 10 bara)? I am asking because when quering for 'carbamate corrosion' or...
  2. demser

    amse b31.3 - stress ratio acc fig. 323.2.2B: documentation in the papers?

    Hi, asme b31.3 fig. 323.2.2B allows application of low-T carbon steel below -48°C if the requirements on Stress Ratio are met. But how is this "translated" into the documents, e.g. pipe class, or for ordering, or for documentation to a Notified Body? In other words: How / where to fix it in...
  3. demser

    Practical experience with S-TEN in flue gas treatment / sulfuric acid?

    Hi Community, for a project on flue gas cooling below the acid dew point, several materials are discussed, among them S-TEN1 and S-TEN2 steel. These are - per composition - weathering steels. According to manufacturers information, the performance in sulfuric acid over a wide concentration...
  4. demser

    NACE MR 0175 / ISO 15156 - H2S and its relevance for assessment of HIC

    Dear all with the new combined standard NACE MR0175 / ISO 15156-2002, several changes had been introduced (with respect to previous MR 0175 versions), still present in the most recent version of 2015. HIC (Hydrogen Induced Cracking) is among the new features, and described in Clause 8 of ISO...
  5. demser

    2205 /1803 duplex in seawater: corrosion tabels available?

    Hi community my first time in eng-tips. I am looking for reliable tables on corrosion of duplex in seawater (if there are any). Can anybody help me? Thank you

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