Re: [PipingDesign] Seawater Piping

From: <SERIF>
Date: Tue May 21 2002 - 07:36:00 EDT

Hello,
I suggest you to investigate CC-GRP ( centrifugally cast glass fiber reinforced plastics)Pipe system. It is :

*Corrosion resistant, ligt weight & extremely durable
*Very smooth ,abbrasion resistant inner surface
*Termo-setting plastic mat'l-insensistive to high temp.differences
*Easy installation and leakproof push-fit coupling system
*PN 1 to PN 25 pressure classes

You may get more info from mail: ozdemirins@superonline.com ,the licenced producer of CC-GRP pipe in my country-Turkiye.

Hoping I helped you some.

├×erif KIZILKAYA
Mech.Eng

> <html><body>
>
>
> <tt>
> Steve,
>
>
>
> What diameter and class are we talking about here?
>
>
>
> I would consider floating the pipe out as one under the jetty and
> winching it
>
> up to the supports. then making the flange connections at each
> end. The PE 80
>
> comes as several grades. The 80 B and the 80C are the most common.
> 80 B is what
>
> is esed to be known as MDPE and the 80 C is HDPE. The problem with
> the latter
>
> is that moderate temperatures will reduce the life span of the
> material. Why
>
> not use PE 100 which is another MDPE as this isnt affected by the
>
> servic
>
>
> The expansion of the PE being 15-20 times that of steel may be
> your biggest
>
> problem. ABS is 10 times that of steel.
>
>
>
> The other problem is local buckling of the pipe wall where the
> support is if
>
> there are moderately high ambient temperatures and thin wall pipe.
> If the pipe
>
> expands and the pipe has buckled locally it can end up being torn
> at the
>
> supports. Need to look at PTFE lining supports and having large
> radii at the
>
> edges.
>
>
>
> You can prices for PE out of Eurapipe in Australia for the NEw
> Zealand market.
>
> Speak to Bernard Ellis . I have added him to this email if you
> want to follow
>
> up.
>
>
>
> Geoff Stone
>
> --- smckennz <Mechproj@xtra.co.nz&gt; wrote:
>
>
>
> <HR&gt;
>
> <html&gt;<body&gt;
>
>
>
>
>
> <tt&gt;
>
> <BR&gt;
>
> Hi Guys<BR&gt;
>
> <BR&gt;
>
> I have done the gut wrenching bit associated with material
> decisions <BR&gt;
>
> and am going for HDPE on this one instead of concrete lined steel
> as <BR&gt;
>
> you recommended.<BR&gt;
>
> Reasons?<BR&gt;
>
> Delivered line price:<BR&gt;
>
> $US $90/m for conc/steel (12m lengths) + $US $525 per 90 deg bend
> + <BR&gt;
>
> $250 (my guess, help Ralph)??? per joint <BR&gt;
>
> <BR&gt;
>
> $US $71/m (12m lengths) for HDPE (PN8 PE80) + $400 per bend + $288
> <BR&gt;
> per joint (electrofusion).<BR&gt;
>
> <BR&gt;
>
> Installation:<BR&gt;
>
> <BR&gt;
>
> Out of the 400m approx total length (and rising), 120m is
> underslung <BR&gt;
>
> beneath a jetty. HDPE is lighter and more flexible. Exactly how we
> <BR&gt;
> are going to do it (drop out the existing conc/steel pipe and
> install <BR&gt;
>
> the PE) is still a mystery so I will add another $71/m for <BR&gt;
>
> installation and figure it out later.<BR&gt;
>
> <BR&gt;
>
> Corrosion resistance:<BR&gt;
>
> The site guys told me that the majority of the many failures they
> <BR&gt;
> have had are from the outside in. I.e. failures in the steel
> jacket.<BR&gt;
> Cant happen with PE.<BR&gt;
>
> <BR&gt;
>
> Speed of Repair:<BR&gt;
>
> Say 2 joints + 2m replacement section.<BR&gt;
>
> Electrofusion for cut and replace on PE- say 2 hrs (chainsaw
> cuts)<BR&gt;
> Gibaults on concrete/steel temporary - say 2+1/2hrs (disc grinder
> <BR&gt;
> cuts)<BR&gt;
>
> Concrete/steel permanent, say 5 hrs (welded straps + injected <BR&gt;
>
> grout???)? <BR&gt;
>
> <BR&gt;
>
> Your valued opinions are requested. Am I making a monkey of myself
> <BR&gt;
> (again)?<BR&gt;
>
> <BR&gt;
>
> Thanks as usual and dont be shy; I dont know where you live.<BR&gt;
>
> <BR&gt;
>
> Cheers<BR&gt;
>
> <BR&gt;
>
> Steve McKenzie<BR&gt;
>
> <BR&gt;
>
> <BR&gt;
>
> <BR&gt;
>
> <BR&gt;
>
> <BR&gt;
>
> </tt&gt;
>
>
>
> <br&gt;
>
>
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Received on Tue May 21 07:36:00 2002

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