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dvthamizh
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Join Date: Sep 2011
Location: Chennai -- India
Posts: 10

Valve Testing

09/17/2011 1:13 AM

Is there any thump rule for hydrostatic testing of Industrial valves?
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ducon
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Join Date: Dec 2006
Location: Hop around Toronto, New York & Karachi
Posts: 1876
Good Answers: 19
#1

Re: Valve Testing

09/17/2011 1:33 AM

1.5 times the operating pressure.

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Whitephone
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Join Date: Jan 2010
Location: Mineral wells Tx
Posts: 630
Good Answers: 34
#3
In reply to #1

Re: Valve Testing

09/17/2011 7:15 AM

Hi Mr Ducon:

Operating pressure or desing pressure?

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ducon
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Join Date: Dec 2006
Location: Hop around Toronto, New York & Karachi
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#5
In reply to #3

Re: Valve Testing

09/17/2011 1:20 PM

Actaully he just registered and shooting off nonsense questions to waste our time. Read his threads - just one line question expecting detailed answer. Now to answer you technically : you first check the pressure rating for the particular material(body and disc).Under that you have diff. pressures for diff. temp. ranges,Confirm your medium's min to max.temperature then you can get the line pressure for your valve.Go to API 598 and see the shell test rating(it will be 1.5 times the rated pressure)and seat test pressure(it will be 1.1 times the rated pressure).
There are lots of standards but the design always begins with the pressure class you want the valve to be.

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Whitephone
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Join Date: Jan 2010
Location: Mineral wells Tx
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#6
In reply to #1

Re: Valve Testing

09/19/2011 12:13 PM

My apologies. It was not my intention to waste your time. WP
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ducon
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Join Date: Dec 2006
Location: Hop around Toronto, New York & Karachi
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#7
In reply to #6

Re: Valve Testing

09/19/2011 12:21 PM

Not my time alone - ours time.

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Anonymous Poster #1
#2

Re: Valve Testing

09/17/2011 1:37 AM

"Rule of thumb"; not "thump".
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Mukesh0861
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Join Date: Dec 2010
Posts: 377
Good Answers: 20
#4

Re: Valve Testing

09/17/2011 1:16 PM

Isolation valves shall be tested at 1.5 times of design pressure of the system not of the individual valve.

Safety valve and relief valves are tested as per set pressure for the system with temperature corrections as applicable.
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blackpanic73
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Join Date: Sep 2011
Location: neighbor of the best country in the world
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#8

Re: Valve Testing

10/04/2011 1:16 PM

API 598 STANDARD IN THE FIELD OF VALVES INSPECTION

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Anonymous Poster (1); blackpanic73 (1); ducon (3); Mukesh0861 (1); Whitephone (2)

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