(no subject)

Thanx guys for your ideas . i really appreciate

Regards,
Ali

> -----Original Message-----
> From: Misra Kuldeep SPEL-T1 [SMTP:kuldeep.misra@siemens.com]
> Sent: Tuesday, October 07, 2003 4:42 PM
> To: 'PipingDesign@yahoogroups.com'
> Subject: RE: [PipingDesign]
>
> Hi Ali,
> If possible use photo image intelligent probe to have picture of inside. I
> hope the pictures taken from probe will be able to give type of inside
> lining. You can enquire about this technology from Pig manufacturer. This
> is
> just an idea.
>
> I think the sledgehammer method as suggested by Steve is also good, by
> resonance one can have better idea but in drill method, it is difficult to
> feel the break through of lining even with hand drill as drill will take
> very less time to penetrate this lining after cutting the hard metal.
>
> It is better, you search documents of manufacturer/supplier/ erector of
> this piping as the piping can not come from black market.
>
> Regards,
> Kuldeep misra
>
>
>
> -----Original Message-----
> From: Steve McKenzie [mailto:Mechproj@xtra.co.nz]
> Sent: 07 October 2003 16:29
> To: PipingDesign@yahoogroups.com
> Subject: RE: [PipingDesign]
>
>
> 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: LIEZWSC@adma.ae [mailto:LIEZWSC@adma.ae]
> Sent: Tuesday, October 07, 2003 11:06 PM
> To: PipingDesign@yahoogroups.com
> 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: PipingDesign@yahoogroups.com
> > 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: LIEZWSC@adma.ae [mailto:LIEZWSC@adma.ae]
> > Sent: Tuesday, October 07, 2003 10:38 PM
> > To: PipingDesign@yahoogroups.com
> > 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: PipingDesign@yahoogroups.com
> > > 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: LIEZWSC@adma.ae [mailto:LIEZWSC@adma.ae]
> > > Sent: Tuesday, October 07, 2003 10:01 PM
> > > To: PipingDesign@yahoogroups.com
> > > 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
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>
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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.
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> 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.
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Received on Tue Oct 07 10:25:00 2003