Discussion on using water for pressure testing heat exchangers
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The standard seems to state that cleaning water with less than 5% CL ions should be used; so is it okay for us to use recycled wastewater? Just asking casually?
We use fire-fighting water; haha, it seems it doesn’t meet the standards either. Personally, I think for heat exchangers that don’t have special requirements, the standards regarding water quality aren’t necessarily that strict – as long as the water isn’t extremely poor in quality, it’s fine! :D
It seems there are no particular requirements for carbon steel; the restriction on chloride ions in stainless steel is intended to prevent stress corrosion. What kind of water is used is not the issue; the key is to meet this requirement. Of course, there should be no substances in the water that could cause damage to the material. I forgot to mention that the chloride ion content must be kept at no more than 25 ppm. This post was last edited by Wen Bing on 2009-4-14 at 19:48.]
So how much Cl- can there be in your circulating water?
What are the requirements for water quality during hydrostatic testing, and can seawater be used? You can refer to http://bbs.hcbbs.com/viewthread.php?tid=372414&highlight=%CB%AE%D1%B9%CA%D4%D1%E9%2B%CB%AE%D6%CA~
Our unit uses fresh water!
To show our true strength in front of foreigners: Watsons distilled water! :Q: According to the quality inspection reports, the CL- ion level in many mineral waters is above the allowed limit. Due to time constraints, I’ll go with the safest option
Less than 5% CL ions??? Where was this rule established? I remember it as a certain number per million ? ?
I remember it was 15PPM... but someone upstairs said it’s 25... 5%... 50,000PPM? This definitely can’t be right..
The standards (such as GB150, GB16409, etc.) only specify requirements regarding water quality for hydraulic testing of stainless steel products