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Chlorine attack

Chlorine attack

Chlorine attack

(OP)
Hi,

I have some water tanks in which the water will have a Chlorine level of between 3 and 4 ppm  (3 to 4 mg/litre)

The pressure in the tanks will be between 10 and 40 Bar and they will vary in size from 2 cubic metres to 40 cubic metres.

I have been asked to line the inside of the tank with butyl rubber, but looking at some web-sites it seems to me that the butyl rubber will be attacked by the Chlorine at this level of ppm, and have a short life (I know butyl is ok at lower Cholrine concentrations, say 0.5ppm).

Can anyone suggest an alternative rubber compound that will resist the Chlorine, and not cost the earth ?

Also, we would normally use a level gauge made from stainless steel, but I am uncomfortable with stainless steel at this chlorine concentration for the pressure the tanks are to work at - am I right to be worried ?

Thanks for any help.

RE: Chlorine attack

Your concentration is less than typical potable city water.  The stainless will be fine for decades, assuming that the temp stays below boiling.

Have you looked at using, instead of a rubber lining, an internal coating of epoxy, i.e. 'Plascite'?

RE: Chlorine attack

Epoxy coating will work well. Natural rubber coating is another alternative.

Don't worry about a stainless steel pressure gauge. As Duwe6 wrote, the chlorine concentration is less than in typical potable water.

RE: Chlorine attack

I agree with the above two comments....your chloride levels are extremely modest.

There are many proven epoxy coatings that will do well in this service,

   

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