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topic 17137

Methods to remove gypsum scale


I'm looking the kind to remove scale formed of calcium sulfate ( gypsum )in to the heat exchanger tubes. the film has 1-5 millimeters .The internal diameter tube is 2 inch, 26 ft longitude; 1250 tubes. The appearance and hardness of the material is like ceramic. Actually we use to remove this scale water at high pressure, but has low efficiency.We have intended with some light acids but hadn't been possible.

Marco Antonio Acuña Medellin
- Monterrey, NL Mexico


I would try a strong chelating material like tetra sodium salt of EDTA.

Geoffrey Whitelaw
Geoffrey Whitelaw
- Port Melbourne, Australia


Dear Marco,

I need a bit more information. I think I have a solution.

Tim Hix
- Moseley, Virginia

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