The PID calls for this requirement. "Full bore check valve with external arm shall be top entry and allow swing replacement in service". The line size is 18". There are block valves shown across it with a drain d/s. I believe that this does not imply that the block valves have to be closed and then the swing taken out for maintenance, which then is an ordinary check valve with only an external arm or a dash-pot.
Sajit
-----Original Message-----
From: rajendra bajikar [mailto:rajendrabajikar@yahoo.com]
Sent: Wednesday, January 07, 2004 9:30 AM
To: PipingDesign@yahoogroups.com
Subject: [Man.Distr]Re: [PipingDesign] Swing Check Valve
Dear Sajit,
Is this a one time problem or regular? What is the line size? Could you please
elaborate?
Regards,
Rajendra Bajikar.
Sajit Viswan <sviswan@tebodin.co.om> wrote: Is there a check valve that allows swing replacement while in service?
Sajit
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Rajendra Bajikar.
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[Non-text portions of this message have been removed] Received on Wed Jan 07 00:58:00 2004
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