Leak Tests for In-Service Control Valves

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Spirochete61 Active Contributor Join Date: Jan 2009 Posts: 19	Leak Tests for In-Service Control Valves 03/17/2009 10:30 PM
	Hi just want ti know how to test leakage for in-service control valves? What pressure to use and procedures, also what code to follow? tnx
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#1 Re: In-service Control Valve 03/18/2009 4:23 AM
	Most companies will have a procedure for doing this as part of planned preventative maintenance ("PPM"). Talk to the Instrument Workshop Supervisor in the first instance. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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David Rodrigues Active Contributor Join Date: Jul 2008 Location: Salvador, Bahia Brazil Posts: 15 Good Answers: 3	#2 Re: Leak Tests for In-Service Control Valves 03/18/2009 10:52 PM
	For seat leakage test in control valve use ANSI/FCI Standard 70-2, rev 2006. In this standard you will find detailed test conditions including recommended pressure drop, temperature, test medium and allowable leakage. Control valve leakage classification shall be stated in the Spec Sheet, according to control valve type and application. IEC has also published a similar standard for seat leakage test, IEC 60534-4-4. __________________ David Rodrigues
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atorroja Associate Join Date: Mar 2009 Posts: 46	#3 Re: Leak Tests for In-Service Control Valves 03/19/2009 12:52 AM
	Normally you can use for leak test the same pressure used during the comissioning leak test. Diferents internal (Company) procedures ask for no more than 5barg. ADOLFO
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roadapple Power-User Join Date: Oct 2006 Posts: 139	#4 Re: Leak Tests for In-Service Control Valves 03/19/2009 9:35 PM
	Spirochete61 are you interested in leakage tests for valve seat leakage or leakage thru the stem of the valve ?
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Spirochete61 Active Contributor Join Date: Jan 2009 Posts: 19	#5 Re: Leak Tests for In-Service Control Valves 03/22/2009 8:53 PM
	Sorry for the late reply. Right now where using the same leakage test (same pressure) use in commissioning but I am sure if I'm during the right procedure. I am interested in both leakage tests for valve seat leakage or leakage thru the stem of the valve. Can someone provide me the exact procedure right now I don't have any copy of the standards you have mentioned. Thanks for all your reply.
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You might be interested in: Control Valves, Gas Valves, Industrial Valves

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