Re: Support Span for 3450I.D. GRP pipe

From: <Gang>
Date: Wed Jan 17 2007 - 23:52:00 EST

Dear friends,
It is very difficult for the participants to be too much elaborative at the same time are crisp, short and sweet, on a forum like this. As Roy mentions, one has to be courteous enough in all the deals. Rudeness does not pay the desired returns.
I had been instrumental/part-taking in executing a few prestigious GRP projects that too the sizes stretching up to 4000 mm in diameter. The system was both above ground as well as underground.
The query here probably refers to the section above ground. If so the matters to be considered are the following.
1. What is the manufacturer’s supplied erection lengths?

2. What is the type of joining them?
a. Laminated.
b. Socket and spigot with resilient sealing ring.
3. In order to avoid loading the field executed

joints, as they are inferior to the mother pipe, it is ideal to support each supplied length at two locations.
4. The system needs to be analyzed for stress analysis, as a whole network. Friction factor at supports and coefficient of thermal expansion needs special attention (it much much higher for GRP as compared to steel). The stresses in the longitudinal and the transverse plains are different due to the fact that it depends on the angle of winding of the filaments. It may even be necessary to go for finite element analysis to ascertain the limits of induced stresses.
5. Solar radiation needs attention. Ultraviolet radiation can affect the pipe material. Addition of pigments to the resin, to add colour to the finished product is a desired feature.

Cheers!
C. V. Gangadharan.
--- Gramya <grai@icenet.net> wrote:

> If you need useful tips, you have to be courteous
> and modest. modesty pays to get you the desired
> support spacing. I hope your pipe is unedrground or
> continuously supported, i.e. mounded.
> NKRoy
>
> ----- Original Message -----
> From: kiransinh
> To: PipingDesign@yahoogroups.com
> Cc: sxviswan@yahoo.co.uk
> Sent: January 17, 2007 1:08 PM
> Subject: Re: [PipingDesign] Support Span for
> 3450I.D. GRP pipe
>
>
> Why you want back ground of piece of pipe ? You
> only answer my question if you have. Don't waste
> time for unnecessary questions.
>
> ----- Original Message ----
> From: Sajit Viswan <sxviswan@yahoo.co.uk>
> To: PipingDesign@yahoogroups.com
> Sent: Wednesday, January 17, 2007 7:45:24 AM
> Subject: RE: [PipingDesign] Support Span for
> 3450I.D. GRP pipe
>
> Can you give me some back ground as to how you
> came upon this piece of pipe?
>
> Sajit
>
> _____
>
> From: PipingDesign@ yahoogroups. com
> [mailto:PipingDesign@ yahoogroups. com] On
>
> Behalf Of kiransinh
>
> Sent: Sunday, January 14, 2007 11:57 AM
>
> To: pipingdesign@ yahoogroups. com
>
> Subject: [PipingDesign] Support Span for 3450I.D.
> GRP pipe
>
> Dear Gentlemen,
>
> Please give me guidance about selection of support
> span for 3450I.D. GRP
>
> pipe thk. 39.7mm.
>
> Regards
>
> Kiransinh Zala
>
> Dodsal Pte. Ltd.
>
> Abu Dhabi.
>
> U.A.E.
>
> ____________ _________ _________ _________
> _________ _________ _
>
> Need a quick answer? Get one in minutes from
> people who know.
>
> Ask your question on www.Answers. yahoo.com
>
> [Non-text portions of this message have been
> removed]
>
> [Non-text portions of this message have been
> removed]
>
> <!--
>
> #ygrp-mlmsg
>

{font-size:13px;font-family:arial,helvetica,clean,sans-serif;}
> #ygrp-mlmsg table {font-size:inherit;font:100%;}
> #ygrp-mlmsg select, input, textarea {font:99%
> arial,helvetica,clean,sans-serif;}
> #ygrp-mlmsg pre, code {font:115% monospace;}
> #ygrp-mlmsg * {line-height:1.22em;}
> #ygrp-text{
> font-family:Georgia;
> }
> #ygrp-text p{
> margin:0 0 1em 0;
> }
> #ygrp-tpmsgs{
> font-family:Arial;
> clear:both;
> }
> #ygrp-vitnav{
> padding-top:10px;
> font-family:Verdana;
> font-size:77%;
> margin:0;
> }
> #ygrp-vitnav a{
> padding:0 1px;
> }
> #ygrp-actbar{
> clear:both;
> margin:25px 0;
> white-space:nowrap;
> color:#666;
> text-align:right;
> }
> #ygrp-actbar .left{
> float:left;
> white-space:nowrap;
> }
> .bld{font-weight:bold;}
> #ygrp-grft{
> font-family:Verdana;
> font-size:77%;
> padding:15px 0;
> }
> #ygrp-ft{
> font-family:verdana;
> font-size:77%;
> border-top:1px solid #666;
> padding:5px 0;
> }
> #ygrp-mlmsg #logo{
> padding-bottom:10px;
> }
>
> #ygrp-vital{
> background-color:#e0ecee;
> margin-bottom:20px;
> padding:2px 0 8px 8px;
> }
> #ygrp-vital #vithd{
> font-size:77%;
> font-family:Verdana;
> font-weight:bold;
> color:#333;
> text-transform:uppercase;
> }
> #ygrp-vital ul{
> padding:0;
> margin:2px 0;
> }
> #ygrp-vital ul li{
> list-style-type:none;
> clear:both;
> border:1px solid #e0ecee;
> }
> #ygrp-vital ul li .ct{
> font-weight:bold;
> color:#ff7900;
> float:right;
> width:2em;
> text-align:right;
> padding-right:.5em;
> }
> #ygrp-vital ul li .cat{
> font-weight:bold;
> }
> #ygrp-vital a {
> text-decoration:none;
> }
>
> #ygrp-vital a:hover{
> text-decoration:underline;
> }
>
> #ygrp-sponsor #hd{
> color:#999;
> font-size:77%;
> }
> #ygrp-sponsor #ov{
> padding:6px 13px;
> background-color:#e0ecee;
> margin-bottom:20px;
> }
> #ygrp-sponsor #ov ul{
> padding:0 0 0 8px;
> margin:0;
> }
> #ygrp-sponsor #ov li{
> list-style-type:square;
> padding:6px 0;
> font-size:77%;
> }
> #ygrp-sponsor #ov li a{
> text-decoration:none;
> font-size:130%;
> }
> #ygrp-sponsor #nc {
> background-color:#eee;
> margin-bottom:20px;
> padding:0 8px;
> }
> #ygrp-sponsor .ad{
> padding:8px 0;
> }
>

=== message truncated ===

________________________________________________________________________________\

---

Need Mail bonding?
Go to the Yahoo! Mail Q&A for great tips from Yahoo! Answers users. http://answers.yahoo.com/dir/?link=list&sid=396546091 Received on Wed Jan 17 23:52:00 2007