cckla:
Comments on your pipe cleaning/testing:
My comment on disconnecting the pump is related to my experience with gas
compression pipeline testing/commissioning. There, the typical situation is to
test piping installations by sections. Compressors/pumps are tested by the
manufacturer, and are almost always connected into the system by flanges. So,
since they are pre-tested and demonstrated good for the pressure, typical
procedure is to test piping up to the pump, with it isolated by valves or blind
flanges. This would take care of your concern about damaging the pump.
On the piping, I agree with the other users - if possible, go with a gas test,
using some inert type gas. If you use water, you will want to have a BIG
compressed air source to remove the residue - and if you blow enough air, you
will probably pick up a lot of left-over weld scale/dirt/trash, that will help
smooth out the start up process. One procedure that I had seen is to open the
line at the downstream end, and place a white painted piece of plywood about 2-4
feet from the end. Blow until you stop getting particles on the plywood. Given
that you will be moving aircraft fuel, you want to get as much out as possible -
what you clean out at this point will help on filter life and maintenance on
start-up.
George McKinney
Dear Mr George McKinney,
We are going to test for its operation, icluding pump, piping and tank. At the same time, we also do for leak test. I understand that we can dry the piping by purging the piping with nitrogen gas. But, could we do the same when the pump is connected to the piping ? I afraid it will damage the internal parts of the pump. By using water as a test medium, we are hoping that the whole system can be totally dried without leaving any problems to the system in the future.
Please guide me.
Thank you.
Regards,
cckla
>
> Just what kind of test pressure/conditions are you looking at? Is this a
leak test, or for actually qualifying a maximum pressure/design pressure?
And concern for the pumps - why not take them out of the system/blind off -
I would assume they are pre-tested by the manufacturer?
>
> George McKinney
> ----- Original Message -----
> From: Christopher Wright
> To: <a href="/group/PipingDesign/post?postID=eZ56XCdSG5cr3aU7Vwz2lasQnA6XjNdApJTWl7CjQTlnqsoPaP5rbf6kdoNoMlRlGBdeYQqO2nDnPlW28l7eg549mZOxHl4">PipingDesign@yahoogroups.com</a>
> Sent: Friday, October 08, 2004 10:32 AM
> Subject: Re: [PipingDesign] Re: Commissioning of aircraft petrol filling
station
>
>
>
> On Oct 7, 2004, at 11:16 PM, RICK wrote:
>
> > why not opt for pneumatic test? i think it`s much less cumbersome.
> And much more dangerous.
>
> Christopher Wright P.E. |"They couldn't hit an elephant at
> chrisw@skypoint.com | this distance" (last words of Gen.
> ...................................| John Sedgwick, Spotsylvania 1864)
> <a href="http://www.skypoint.com/~chrisw/">http://www.skypoint.com/~chrisw/</a>
>
>
>
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[Non-text portions of this message have been removed] Received on Tue Oct 12 09:04:00 2004
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