Hydrotesting

[unclesyd]

Would the use of 2 1/2" poly spheres for volume reduction be allowed during hydrotesting of a P.V?
The purity requirements for the test water are extremely high due to a highly polished interior. The volume is 2250 gals with a test pressure of 40 psig. Other test media has been ruled out. The hollow spheres are polyethylene or polypropylene, to be determined. There are 18 vessels in the first lot.

 

[TGS4]

I don't recall that such a thing is specifically forbidden. If

http://www.carbertesting.com/HydroStaticNozzle.html

is permitted, I see no reason that your approach wouldn't be acceptable either.

 

[Duwe6]

Just get [ahead of time] the concurrence of your AI. I like your idea, excellent job of 'thinking outside the box'.