How to prevent corrosion in high-pressure steam pipes?
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After operating for a period of time, even though the high-pressure steam pipes are insulated on the outside, the pipes beneath the insulation still rust severely. Is there any way to carry out appropriate anti-corrosion treatment?
Use high-temperature resistant silver powder paint, etc. Is the insulation material of poor quality, with excessive chloride ions?
Before operation, it was coated with high-temperature silver paint, but over a period of one and a half years, most of that paint would wear off
The pipes beneath the insulation layer of the high-pressure pipelines are still severely corroded. Regarding this overall phenomenon, it is indeed metal corrosion beneath the insulation layer; such corrosion can cause cracks in the welds and pipe perforations, reducing the service life of the pipes and affecting safe production. Therefore, we need to pay attention to metal corrosion beneath the insulation layer. Depending on the temperature of the pipes, appropriate high-temperature corrosion-resistant materials should be selected; such materials must be able to withstand certain temperatures as well as exhibit good corrosion resistance. Using ordinary materials is ineffective in this regard ； Second, select appropriate insulation materials.
Why do high-pressure steam pipes rust so severely? Has the insulation started leaking because it hasn’t been used for a long time?
Hello, teacher. We use glass wool as our insulation material. Are there any other suitable insulation materials? Our high-pressure steam pipes, with a pressure of 4.0 Mpa, as well as the equipment, are severely corroded
One of the main factors that lead to rusting is a problem with the waterproof layer on the surface of the insulation material. You can check the areas that haven’t been soaked by rain to confirm the issue with the waterproof layer. A waterproof layer is typically formed by wrapping galvanized thin iron around it and applying paint to the surface of the glass cloth. So it’s best to focus on waterproofing the surface of the insulation layer. For reference.
Be sure to carry out this waterproofing step properly.
I’m retired and at home now; I’m just sharing what I’ve experienced: lol