What should be the maximum allowable level of free chlorine for potable water pipe lines made of SS304?
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Re: How much chlorine can stainless steel withstand?
21 April 2010 at 1:29pmAccording to Tuthill et. al. (See NACE Corrosion '98 technical paper no. 708), 304 stainless steel is resistant to localized corrosion by chlorinated fresh water up to 2 ppm chlorine. 316 stainless steel can tolerate up to 5 ppm chlorine. This data indicates that both 304 and 316 stainless steel should resist long term exposure in most chlorinated fresh waters which is in agreement with general experience.
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