7/28/2019 Paint_coatings Engineering - Internal Coating for High Pressure _ Temp

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7/28/2019 Paint_coatings Engineering - Internal Coating for High Pressure _ Temp

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The question is, essentially: when selecting and specifying a coating, does one regard the "coating design temperature" to be identical to the "mechanica

design temperature" of the item to be coated. It should be noted that, with instrumented controls etc, the actual maximum achievable temperature durin

operation could be lower than the "mechanical design temperature." Therefore, if one is confident that this lower, maximum operating temperaturewould never be exceeded, it could be beneficial to adopt this temperature as the "coating design temperature." Another thing to bear in mind is that one

could also get smart with respect to whether the mechanical design temperature has simply been set by fluid temperature allowing some fancy heattransfer calculations to arrive at the actual temperature experienced by the external surface to which the coating is to be applied. When coating

something like a subsea christmas tree, this temperature differential could be several tens of degrees celsius under transient conditions and make a

significant difference to the coating selection requirements.

It could also be argued that the question is: "how lucky do you feel?!!", or "how much do you trust the process engineer and the mechanical engineer?!!!

Steve JonesMaterials & Corrosion Engineer

http://www.linkedin.com/pub/8/83b/b04

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