Tuesday, June 29, 2010

Re: [MW:5783] hydro test

Dear Selvan,
 
I understand what is your intention .See........ you are not mention what code and what process you are followed..
 
In Generally as per you have mentioned TP is 100 Bar so PSV should set for 110 BAR .you are telling that duration is 6 hours (I do not know whether it is Hydro or service test ? ) however
 
However if there is Hydro test , you need to maintain the pressure between Test Pressure and Set pressure during the holding time .
 
As long as there is no leak found visually during the holding time test would be acceptable.
 
Your supervisor what stated you that maintain 100 Bar all the time during period.It is wrong .
 
Pressure should be concistencly increases according to temp increases ,Even there is Air inside the pipe or leak occurred pressure will not be stable unless it less test pressure.
 
I hope you cleared now .better you should use pressure recorder .them you can able to justify easily based on the pressure and temperature graphs from the recorder.
 
Thanks
 
Suresh

 
On 6/29/10, Senthamil Selvan <centh@rediffmail.com> wrote:
dear,


please any body explain me. my test pressure is 100bar and holding
time is 6hours.when he do the test, the pressure and temperature is
increase,our supervisor reduce the pressure and maintain the same 100bar
it is correct or what.please tell me.this is station manifold.

regards,
a.s.selvan

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Thanks  & Best Regards,

Suresh

Mobile No: 91-92 92 905 905

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