Abstract:
This paper is for Stamicarbon customers and prospects only
Operating urea equipment over many years will lead to thinning of the alloy protection.
This thinning takes place gradually and varies depending on the equipment in question – with different levels of corrosion also.
In a Urea reactor, for instance, the corrosion at the top is greater than at the bottom.
This reduction in liner wall thickness shouldn’t automatically mean the end of the lifetime of a reactor: An in situ relining could extend the lifetime of the reactor for many years.
To allow an optimum repair with respect to quality, timing and down time of the Urea reactor, it’s important to have a good game plan and make solid preparations prior to the turn around.
In the HP Heat Exchangers, the liner is not the critical factor. The heat exchanger tubes are the limiting factor with respect to the lifetime of the equipment and a replacement appears to be the most economical solution.
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