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August 1 - August 7, 2011

Which lining systems are suitable for the maintenance painting of an mono ethylene glycol storage tank protection?

Selected Answers

From parviz mohamadi of Parssahmin on December 31, 2011:
     I think epoxy glass flake is the best choice. The system is a holding prime with dry film thickness o 50-70 microns and  epoxy glass flake at 300-350 microns. I can't find a standard for my recommendation,  but I use this system for many MEG tanks . I think it has suitable durability.

From Mike Winter of International Paint on August 2, 2011:
      Mono ethylene glycol (MEG) is not a particularly strong solvent and standard epoxy tank linings have sufficient chemical resistance to handle this service. If the tanks are pitted, then a solvent-free epoxy lining can be used. As with any tank lining service, the suitability of the lining should be confirmed with the manufacturer as chemical resistance varies within generic type. There are two particular situations that require special attention with MEG. MEG is sometimes used for fibre production, which has special purity requirements. When there is a high purity requirement, the lining should be tested and approved by the end user of the MEG to ensure that residual solvent or other material that may leach from the lining do not affect the end use of the MEG. In some situations, such as on an FPSO, there may be a requirement to line a tank or vessel that contains hot MEG or hot MEG/water mixes at 80 C or so. In this case the preferred lining will be a novolac epoxy (ambient-cured) due to the higher temperature – again, the novolac epoxy should have been tested and approved for this service by the manufacturer.

From richard d souza of stoncor middle east llc on August 2, 2011:
     For MEG service, Bis F-based coatings are the best and blasting to SA3 or SSPC-SP 5 is imperative for maintenance painting.

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