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  1. Nicknackwhack

    HIC severity level

    Thanks Steve, You are right that is out of date My apologies to KMur,
  2. Nicknackwhack

    HIC severity level

    Hi, You can find a copy of TMO-284 here www.enes26.ru/forum/attachment.php?attachmentid=578&d Essentially inclusions/impurities within your material act as a nucleation sites for Hydrogen atoms, this leads to HIC. It is particularly important for flat rolled pipework which is more susceptible...
  3. Nicknackwhack

    HIC severity level

    A) Is it sour Service B) Is it Wet C)Is it tested for HIC D) Impurities If its not rated to TMO-284/NACE rated, has impurities is wet and is in a sour service you have a problem. (Based on carbon steel)
  4. Nicknackwhack

    H2S pitting

    Hi Guys, Can you point me in the direction of any good (visual) examples of H2S pitting in lines with approximately 50 Barg pressure and 50 C temperature With ppm's in the region of 2000 for CO2 and 1000 for H2S. This would be on carbon steel pipework I suspect that the resultant pits would be...
  5. Nicknackwhack

    I'm looking for a fluid for pressure testing tools like water based inhibitors for tools

    Hi Presume you are talking about using TEG, As long as the compression process didn't heat it to the extent that you had a chemical breakdown of the TEG there would not be any corrosion of the steel http://www.dow.com/ethyleneglycol/about/properties.htm as you can see it has a very low...
  6. Nicknackwhack

    Different of Preservation, Lay Up and Mothballing

    Hi, Preservation is regarding the use of inhibition/ inert gas to provide protection to systems during downtime. Mothballed equipment is the positive isolation of equipment ie spool removal, typically it is associated with equipment that has been taken out of service. Please note that this...
  7. Nicknackwhack

    APNB MIC

    Hi All, Do you know at what log level to become concerned with Acid producing Nitrate bacteria, and the compound affect of having a significant amount of GHB, is 1^6 sessile in both an issue for example when talking about carbon steel pipework? Thanks,
  8. Nicknackwhack

    Galvanic corrosion

    Thank you all for your input. I know there will be a galvanic circuit in place my query is whether it will be negligible in effect. I am investigating a rather large cathode (tubes) and small anode (tubesheet) The CO2 is only 0.12 mol% and the h2s is 100 ppm.
  9. Nicknackwhack

    Galvanic corrosion

    Hi What possible condition would be required to enable galvanic corrosion in a deaerated environment? I'm looking at a join between duplex and carbon steel which has condensed water with dissolved CO2 and H2S. Is there a possibility of the combination of the two dropping the pH to make...

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