why must globe & gate vale be isolated from system in test(in the
why must globe & gate vale be isolated from system in test(in the
(OP)
when we test the one test package ,sometimes in the end line we have gate&globe valve , we isolated the valve from line and cap the line.why cannot we close the valve and dont use cap.





RE: why must globe & gate vale be isolated from system in test(in the
RE: why must globe & gate vale be isolated from system in test(in the
RE: why must globe & gate vale be isolated from system in test(in the
1. Package Test
If you are testing the integrity of the package itself, a warranty issue with the package vendor is one thing.
Is the valve OUTSIDE THE BATTERY LIMIT of the package? i.e. the valve was not supplied by the package vendor... then they do not want to have their package test affected by a leaky valve.
2. System Test
If you are testing the whole system and you cannot afford to have leaks then you have to RETEST after the valve was re-installed (two flanged joints that were not tested yet).
May be the system test is outside the scope of your vendor so plant personnel may have to do the last test...
HTH
Saludos.
a.