Hydrotest Pressure

[Pipeline Engineer]

Hi Folks,

I am an pipeline engineer and need to know how much Chloride content (ppm) are allowed to for water used for hydrotest of cross country pipeline (API 5L). Any reference to a code/standard would also be appreciated.

Thanks

Zohaib

 

[LittleInch]

https://www.eng-tips.com/viewthread.cfm?qid=352353

As this says offshore they test with seawater...

Normal c steel of you remove oxygen it doesn't matter.

Stainless steel is different.

Also if it leaks on test you can poison the ground of you use hugh chloride water.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Pipeline Engineer]

Hi LittleInch,

Thank you for your response. I am working on an on shore pipeline project and I was wondering if 200 ppm would be good enough to avoid the pitting and corrosion. I have searched online and found 100 ppm in fresh water and I was wondering if some one can guide me based on their experience that what would be practical ion terms of having the Chrliode content in water for Hydrotesting. I have gone through the link as you advised, but I was not able to find the information about onshore pipeline which I am looking for specifically.

Zohaib

 

[LittleInch]

If you add some oxygen scavenger - which you would need for any oxygenated water - then 200 ppm for Carbon Steel is OK. My point was that if people can make it work Ok for seawater ( 40,000 ppm?) then you can make it work for 200 ppm.

It's the stainless steels which don't like the chlorides.



Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Pipeline Engineer]

Thank you very much for your reply and clarification.

Zohaib