(no subject)

From: <Steve>
Date: Tue Oct 07 2003 - 06:59:00 EDT

Hi Ali
while I know nothing about platforms, I suspect that the velocities will be on the high side and you may get some vibration. Both are bad for cement lined steel and the designers would be unlikely to specify.

Be careful about deducing the presence of a liner by the presence of flanges; a lot of cement lined steel pipe, in larger sizes, is not flanged. Flanges are a cost/serviceability thing.

A test I have used with mixed success is to smack the pipe with a sledgehammer. Plain steel vibrates afterwards, lined steel does not. Its a cavemans ultrasonic thickness test.

Unfortunately I do not know USN52. However a good thickness measurement technician with decent transducers and a scope should be able to pick up a liner inside the pipe by the reflection profile at a number or points. If you have a flowmeter on the line, the calibration data may help but it is unlikely.

If it is only a dump line then the pressure should be moderate. If site rules permit, I would weld a few 1/2" sockets to the pipe in "dull" areas identified by caveman method.To the socket, attach a ball valve with standoff nipple and 1/4" gland. Using a 1/4" drill bit through the gland and open valve, drill through the pipe wall with a hand drill. When you feel the drill start to break through, stop and have a look. If water pours out there is probably no lining. Drill a bit further. If there is a lining you should feel the grinding through the drill. When finished, withdraw the drill and close the valve. If this is unclear, describe it to your pipefitter. If he doesnt get it, email me.

My guess is no cement lining. It nearly always winds up leaking with seawater and the platform designers would know this.

My last question is "why do you need to know?"

Cheers

Steve McKenzie

-----Original Message-----
From: <a href="/group/PipingDesign/post?postID=3pnXgR_3GLAAJV_siMKSRvfNNExbrwZ_yPzh8q5_HGeSeNx1ASOgY8Oo0aKLnZbv3RhIgvY">LIEZWSC@adma.ae</a> [mailto:<a href="/group/PipingDesign/post?postID=3pnXgR_3GLAAJV_siMKSRvfNNExbrwZ_yPzh8q5_HGeSeNx1ASOgY8Oo0aKLnZbv3RhIgvY">LIEZWSC@adma.ae</a>] Sent: Tuesday, October 07, 2003 11:06 PM To: <a href="/group/PipingDesign/post?postID=NJH6h8RbxtNRTANHO7iZc689QgeHevyfrrCC2g-kREEBfC-5fth7JPx-pwPOf9vYBBETeXC6_SPD33LXcOMQeKQ-">PipingDesign@yahoogroups.com</a> Subject: RE: [PipingDesign]

Steve,

It is only a dump 30" dump line carbon steel (sea water), water injection platform. the average thickness we are getting is 7 to 10 mm by USN 52, the pipe is above ground. You are right I will ask some of the mechanical guys over here ... but let me know any other method I can do to find out if lining is there. Appreciate your help

Regards,
Ali

> -----Original Message-----
> From: Steve McKenzie [SMTP:Mechproj@xtra.co.nz]
> Sent: Tuesday, October 07, 2003 1:54 PM
> To: <a href="/group/PipingDesign/post?postID=NJH6h8RbxtNRTANHO7iZc689QgeHevyfrrCC2g-kREEBfC-5fth7JPx-pwPOf9vYBBETeXC6_SPD33LXcOMQeKQ-">PipingDesign@yahoogroups.com</a>
> Subject: RE: [PipingDesign]
>
> Hi Ali
>
> if the line has leaked, then you can almost certainly drill a hole; its
> just
> another leak.
> Is it a seawater line or a fresh water line? Is it steel? What size and
> pressure? What does it connect to?
> What thickness reading did you get from the UT meter? What type
> (make/model)
> of meter is used?
> Do you have access to the original line installers?
> Is the pipe above ground or buried?
> If you are new to the site are there any old guys, esp tradesmen, that you
> can ask?
>
> Sorry about all the questions.
>
> Cheers
>
> Steve McKenzie
>
>
> -----Original Message-----
> From: <a href="/group/PipingDesign/post?postID=3pnXgR_3GLAAJV_siMKSRvfNNExbrwZ_yPzh8q5_HGeSeNx1ASOgY8Oo0aKLnZbv3RhIgvY">LIEZWSC@adma.ae</a> [mailto:<a href="/group/PipingDesign/post?postID=3pnXgR_3GLAAJV_siMKSRvfNNExbrwZ_yPzh8q5_HGeSeNx1ASOgY8Oo0aKLnZbv3RhIgvY">LIEZWSC@adma.ae</a>]
> Sent: Tuesday, October 07, 2003 10:38 PM
> To: <a href="/group/PipingDesign/post?postID=NJH6h8RbxtNRTANHO7iZc689QgeHevyfrrCC2g-kREEBfC-5fth7JPx-pwPOf9vYBBETeXC6_SPD33LXcOMQeKQ-">PipingDesign@yahoogroups.com</a>
> Subject: RE: [PipingDesign]
>
>
> Steve,
>
> The line is running we cannot drill hole.
> The line leaked previously many time, but I'm new in the site.
> Our UT meters cannot detect the interface.
>
> Regards,
> Ali
>
>
> > -----Original Message-----
> > From: Steve McKenzie [SMTP:Mechproj@xtra.co.nz]
> > Sent: Tuesday, October 07, 2003 1:30 PM
> > To: <a href="/group/PipingDesign/post?postID=NJH6h8RbxtNRTANHO7iZc689QgeHevyfrrCC2g-kREEBfC-5fth7JPx-pwPOf9vYBBETeXC6_SPD33LXcOMQeKQ-">PipingDesign@yahoogroups.com</a>
> > Subject: RE: [PipingDesign]
> >
> > Hi Ali
> >
> > tried drilling a small hole? Any inspection hatches?
> > Some ultrasonic thickness meters may pick up the cement/steel and the
> > cement/water interface but it would pay to have a good meter operator.
> > Cheers
> >
> >
> > Steve McKenzie
> >
> > -----Original Message-----
> > From: <a href="/group/PipingDesign/post?postID=3pnXgR_3GLAAJV_siMKSRvfNNExbrwZ_yPzh8q5_HGeSeNx1ASOgY8Oo0aKLnZbv3RhIgvY">LIEZWSC@adma.ae</a> [mailto:<a href="/group/PipingDesign/post?postID=3pnXgR_3GLAAJV_siMKSRvfNNExbrwZ_yPzh8q5_HGeSeNx1ASOgY8Oo0aKLnZbv3RhIgvY">LIEZWSC@adma.ae</a>]
> > Sent: Tuesday, October 07, 2003 10:01 PM
> > To: <a href="/group/PipingDesign/post?postID=NJH6h8RbxtNRTANHO7iZc689QgeHevyfrrCC2g-kREEBfC-5fth7JPx-pwPOf9vYBBETeXC6_SPD33LXcOMQeKQ-">PipingDesign@yahoogroups.com</a>
> > Subject: [PipingDesign]
> >
> >
> > How can I confirm that the pipe internally has a cement mortar lining,
> > suppose no original data is available?
> >
> > Regards,
> > Ali
> >
> >
> >
> >
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> Information presented on this list is given as helpful advice, nonsense,
> carefully-considered calulation or any combination of the above. The
> intent
> is to spark discussion and encourage knowledge-sharing amongst
> professionals. If you blow yourself up by doing stuff remotely described
> by
> info gleaned from reading this list, you are an idiot.
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>
> ========================================
> Discussion List sponsor: The fluid flow calculations website -
> www.LMNOeng.com - LMNO Engineering, Research, and Software, Ltd.
> =======================================
> Information presented on this list is given as helpful advice, nonsense,
> carefully-considered calulation or any combination of the above. The
> intent is to spark discussion and encourage knowledge-sharing amongst
> professionals. If you blow yourself up by doing stuff remotely described
> by info gleaned from reading this list, you are an idiot.
>
> Your use of Yahoo! Groups is subject to <a href="http://docs.yahoo.com/info/terms/">http://docs.yahoo.com/info/terms/</a>
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---

Information presented on this list is given as helpful advice, nonsense, carefully-considered calulation or any combination of the above. The intent is to spark discussion and encourage knowledge-sharing amongst professionals. If you blow yourself up by doing stuff remotely described by info gleaned from reading this list, you are an idiot.

Your use of Yahoo! Groups is subject to <a href="http://docs.yahoo.com/info/terms/">http://docs.yahoo.com/info/terms/</a> Received on Tue Oct 07 06:59:00 2003