Eurapipe manufacture rubber ring jointed systems for ABS. I have used tandem rubber bellows with a vertical down loop in an ABS application to take up expansion on a sewage line running the length of a sedimentation tank. If the expansion is only moderate then Victaulic couplngs can perhaps be used to take a small expansion at every joint. I would investigate running below ground if possible to get a more stable temperature.
I'll send you photograph off line of the bellows solution. --- smckennz <Mechproj@xtra.co.nz> wrote:
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<tt>
<BR>
Hi there<BR>
<BR>
As part of a plant upgrade, I need to install a new cooling water <BR>
supply line to replace an existing worn out and undersized concrete <BR>
lined supply line. <BR>
The flow will be around 1200 - 1300 m^3/h and head about 50m. Max <BR>
seawater temperature is 25C, normal around 12C. On a hot day, the <BR>
ambient temperature can get to 35C briefly. Line length, <BR>
guessing,will be about 500m. The pipe will run above ground. To date <BR>
there has been no problem with marine growth fouling the existing <BR>
line. I am quite keen on ABS pipe for this duty and the owners seem <BR>
to like impact resistant PVC. The pipe runs are fairly straight, with <BR>
no room for doglegs or expansion loops. So I need to think carefully <BR>
about expansion. I was thinking of something like the rubber O - <BR>
rings used on sewer piping. <BR>
<BR>
Are there any systems available for absorbing expansion at the pipe <BR>
joints? <BR>
<BR>
What pipe material selections would others recommend for this service?<BR>
Any bad experiences?<BR>
<BR>
Cheers<BR>
<BR>
Steve McKenzie<BR>
<BR>
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