NDT performed after or before Hydrotest test

[mrmalcolm]

Dear colleagues,
Any code mentioned Non-destructive testing should be performed after or before the hydrostatic test?
If non-destructive testing is performed after the hydrostatic test, is it possible that the hydrostatic test could cause minor imperfection to expand into major defects?
If non-destructive testing is performed before the hydrostatic test, could the pressure of the hydrostatic test cause the pressure vessel to explode?
Thank you.

 

[mfgenggear]

“To in sure weld integrity”. : INCORRECT
Pressure test is to check a pressure vessel integrity, not only the welds
Hydrostatic pressure test for piping is different for pressure vessels.

I think you lost it, better take a chill pill

 

[mfgenggear]

“To in sure weld integrity”. : INCORRECT
Pressure test is to check a pressure vessel integrity, not only the welds
Hydrostatic pressure test for piping is different for pressure vessels.

Nitrogen leak test

 

[mfgenggear]

After Cleaning fittingtack welding and welding atlas centaur oxygen and hydrozine fuel lines, a pressure test is conducted with helium. The welds do leak but it is very very light. Which then has to be repaired or reworked.

 

[r6155]

mfgenggear​

Increasingly confused.

 

[mfgenggear]

mfgenggear​

Increasingly confused.

What ever you need to work on your people skills.