RE: [PipingDesign] Re: Position of valves(ball valves and globe valves)

From: <Michael>
Date: Mon Jul 28 2008 - 07:13:00 EDT

I know when I've routed some pipe with these valves, I'VE preferred the ball isolation valve first. Being as this was me as-builting, when I had asked the engineer why they were different and there was a purpose he told me it made no difference. I took what he said with a grain of salt, and moved on, was my job to as-built, not to re-engineer.

From: PipingDesign@yahoogroups.com [mailto:PipingDesign@yahoogroups.com] On Behalf Of Steve McKenzie
Sent: Monday, July 28, 2008 3:52 AM
To: pipingdesign@yahoogroups.com
Subject: RE: [PipingDesign] Re: Position of valves(ball valves and globe valves)

There is frequently a preference to use the ball valve as a service isolation valve to permit removal of the globe valve for servicing without decommissioning the entire (upstream) system.

Cheers

Steve

To: PipingDesign@yahoogroups.comFrom
<mailto:PipingDesign%40yahoogroups.comFrom> : sviswan@technip.comDate
<mailto:sviswan%40technip.comDate> : Mon, 28 Jul 2008 08:34:21 +0400Subject:
Re: [PipingDesign] Re: Position of valves(ball valves and globe valves)

The query was regarding the sequence of installation of the valves in theflow direction.Sajit"Michael Roble" <mroble@spcdmg.co
<mailto:mroble%40spcdmg.co> m> To Sent by: PipingDesign@yahoogroups.com
<mailto:PipingDesign%40yahoogroups.com> PipingDesign@yaho cc ogroups.com
Subject [PipingDesign] Re: Position of 28/07/08 07:42 AM valves(ball valves and globe valves) Please respond to PipingDesign@yaho ogroups.com >>Which arrangement is the correct one.<<I guess it really wouldn't matter which way they were oriented seeingas the ball valves' purposes are to shut off, and the globe valves'purposes are to throttle.I just saw recently at a power plant they had me as-builting and on thefuel-oil line on each take-off for each burner they had varyingarrangements of a ball valve, solenoid valve and a globe valve. Each ofthose three were present at all burners, just one floor had ball,solenoid, glove... and the other three four floors had ball, glove,solenoid. Apparently, from what I was told it makes no difference inthe end.Save a tree...please don't print this e-mail unless you really need to.

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[Non-text portions of this message have been removed] Received on Mon Jul 28 07:13:00 2008