mannyytayag@yahoo.com wrote:
> GRP is thermoset plastic resin reinforced with
> fibreglass and lined with a gel coat. The material
> ia
> generally corrosion resistant to most chemicals and
> thus has found a market in the chemical industry. It
> is cost competitive to alloy steel piping but does
> have some design limitations.
>
> The physical properties are anisentropic and thus
> needs additional engineering. The material has a low
> strain tolerance so in buried applications or at
> supports care needs to be taken in assessing the
> local
> buckling criteria.
>
> There are different techniques in laying up the
> reinforcement. Some designs use acriss cross
> roving,
> others a layered wrap and HOBAS uses a sand filled
> resin with random orientated chopped glass strands.
> Each of these techniques affects the physical
> properties.
>
> GRP has been used in service station piping for
> petroleum however I have not heard of its use in
> refineries ither than for effluent treatment plants
> or
> buried watermains.
>
> Some chemical plants may use polypropylene or uPVC
> piping reinforced with fibreglass.
>
> Because pipes are generally laid up on mandrels they
> are in flanged lengths or use a rubber ring jointed
> system. This makes field work more intensive as one
> has to wait for closing lengths or the need for
> thrust
> blocks. Once in the pipe system is not easy to
> modify.
>
> Some problems I have encountered include:-
>
> Collapse in trench conditions
> Delamination of the internal gel coat
> External damage due to impact from tools, rocks etc
> Fire damage
> Long term degradation
>
> Suggest you surf the net , find the suppliers and
> get
> the information from them.
>
> The are standards that cover this material in ASTM,
> AWWA etc. Invest in the standards and read up on the
> material. They can all be downloaded, for a price,
> from the standards web sites.
>
> Good Luck..
>
> manny
>
> --- Tarak Panchal <Tarak.Panchal@Halliburton.com>
> wrote:
> <HR>
> <html><body>
> <tt>
> CAN YOU PLEASE TELL SOMETHING ABOUT GRP PIPING
> CONCEPT
> AND WHERE AND WHY IT<BR>
> IS USED.<BR>
> <BR>
> TARAK N. PANCHAL<BR>
> Kellog Brown & Root - A Halliburton Company<BR>
> mail : tarak.panchal@halliburton.com
> <mailto:tarak.panchal@halliburton.com> <BR>
> Ph : Direct - 0065-329 4149; Board
> -
> 0065-223 8311<BR>
> Fax : 0065-423 0916<BR>
> Resi : Will be given later<BR>
> <BR>
> <BR>
> <BR>
> <BR>
> [Non-text portions of this message have been
> removed]<BR>
> <BR>
> </tt>
>
> <br>
>
> <!-- |**|begin egp html banner|**| -->
>
> <table border=0 cellspacing=0 cellpadding=2>
> <tr bgcolor=#FFFFCC>
> <td align=center><font size="-1"
> color=#003399><b>Yahoo! Groups
> Sponsor</b></font></td>
> </tr>
> <tr bgcolor=#FFFFFF>
> <td align=center width=470><table border=0
> cellpadding=0 cellspacing=0><tr><td
> align=center><font
> face=arial size=-2>ADVERTISEMENT</font><br><a
>
href="http://rd.yahoo.com/M=213858.1650662.3186813.1261774/D=egroupweb/S=1705083\
319:HM/A=763352/R=0/*http://www.classmates.com/index.tf?s=5085"
> target=_top><img
>
src="http://us.a1.yimg.com/us.yimg.com/a/cl/classmates_com2/bll_lrec1.gif"
> alt="" width="300" height="250"
> border="0"></a></td></tr></table></td>
> </tr>
> <tr><td><img alt="" width=1 height=1
>
src="http://us.adserver.yahoo.com/l?M=213858.1650662.3186813.1261774/D=egroupmai\
l/S=1705083319:HM/A=763352/rand=756190475"></td></tr>
> </table>
>
> <!-- |**|end egp html banner|**| -->
>
>
> <br>
> <tt>
>
___________________________________________________<BR>
This archive was generated by hypermail 2.1.8 : Mon Oct 27 2008 - 20:23:55 EDT
