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[MW:2609] Quality of water(ppm) to be use for SS piping hydrotest

By Materials & Welding
Most client specifications allow 20-50ppm, and few allow even up to 100ppm (refer to any of the EIL, UOP, Shell, Aramco, NORSK etc. standards). 

here is some code referance
API 560 Max. 50ppm for ASS
API RP573 Max. 50ppm for ASS 
API 650 Max. 50ppm for SS, 200ppm at T<40C and Max. 100ppm at 40C<T<65C /
API 661 Max. 50ppm for ASS or Ni-Cu Alloys 
API 660 Max. 20ppm for ASS

generally water categorised as below- measure of hardness expressed in ppm (mg/l as CaCo3):
0 - 100 Soft
100 - 200 Moderate
200 - 300 Hard
300 - 500 Very hard
500 - 1,000 Extremely hard

few additives available in the market which can be used with hydro test water to reduce ppm content.

On Thu, Jul 2, 2009 at 6:46 AM, Dilip Kumar <dilipkumar@ctci.co.th> wrote:

Dear friends,

 

I would like to have your opinion about the subject, and if any one have supporting document in the form of code and practices, previously done or various company method statement's to support the potable water to be use for hydrostatic testing for SS piping.

 

Thanks

 

With regards.

 

dk

 

 



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