We use spiral wound stainless steell pipe and ABS
almost exclusively in water and waste water projects
in Australia. the amount of ductile iron cement lined
plant is reduciong dramatically. Carbon steel is
almost never heard of as the cost of painting and
repainting makes it uncompetitive.
Some papers on the NIDI website shpow that in the USA
authorities are just beginning to take this on board.
In the pulp and paper industry we have been using milk
tube 316ss for many years up to DN100. Sch 10s is only
used for larger lines containing flammable products.
Cooling water, ducted air etc are usually in thin wall
spiral wound stainless steel.
geoff
- Paul Bowers <pbowers@pipingdesign.com> wrote:
<HR>
<html><body>
<tt>
Standards<BR>
<a
href="http://www.pipingdesign.com/standards.html">http://www.pipingdesign.com/st\
andards.html</a><BR>
<BR>
Comparison of ANSI and ISO Piping Systems (Pulp and
Paper<BR>
Applications)<BR>
Avesta Sandvik Tube AB<BR>
<BR>
<<Stainless steel pipes are widely used in the
pulp and paper<BR>
industry.The share of stainless steel as piping
material has<BR>
increased at these mills during the last five to ten
years.The<BR>
reasons for this increase have been more corrosion
aggressive<BR>
fluids and environmental aspects as processes have
become more<BR>
closed. In the systems the fluid temperatures tend to
rise and<BR>
concentrations of contaminants (slime and limestone)
increase.<BR>
Also the original quality of raw water may be poor
(for example a<BR>
high chlorine content,etc.) At the most recently built
mills all<BR>
piping are of stainless steel except for steam and
condensate<BR>
pipelines. (316Ti) are steels of this
kind.Ti-stabilized grades do<BR>
not bring any technical advantage compared to grades
with a C<BR>
content below 0.05%.This paper focuses on the
ANSI/ASTM 304L and<BR>
316L stainless steel grades.>><BR>
<BR>
<BR>
Pumps<BR>
<a
href="http://www.pipingdesign.com/pumps.html">http://www.pipingdesign.com/pumps.\
html</a><BR>
<BR>
Online Pump Selector<BR>
Impeller.net<BR>
<BR>
<BR>
Practical Piping Design<BR>
<a
href="http://www.pipingdesign.com/designpractical.html">http://www.pipingdesign.\
com/designpractical.html</a><BR>
<BR>
All You Ever Wanted to Know About DIN Piping
Components (5MB+ PDF<BR>
File)<BR>
Avesta Sandvik Tube AB<BR>
<BR>
<<This page should answer a lot of questions
many of you have<BR>
dealt with in the past regarding non-ANSI piping
component<BR>
dimensions and weights.>><BR>
<BR>
<BR>
The Piping Network<BR>
<a
href="http://www.pipingdesign.com/pipingnetwork.html">http://www.pipingdesign.co\
m/pipingnetwork.html</a><BR>
<BR>
<<Chris' Thoughts on Piping Design
Automation<BR>
<BR>
Q: I need some URLs for web sites where I can learn
piping stress<BR>
analysis. A few e-books I can download would be OK,
too.<BR>
<BR>
A: It's the easiest thing in the world. Just buy FEA
software.<BR>
It'll do everything you want. Look for the words
'user-friendly'<BR>
on the box so you don't have to worry about bugs or
input<BR>
checking. Just ask the sales person if you're not
sure--they're<BR>
great guys. Don't worry about accuracy, either--that's
what they<BR>
pay programmers for. FEA makes all that mechanics
stuff about<BR>
stress and strain obsolete, so don't clutter up your
desk with a<BR>
lot of books. If the computer makes the number, it's
right. Just<BR>
remember that the red places on stress plots are
bummers,<BR>
everything else is cool. Make sure you get a big fast
computer<BR>
with a lot of megs and stuff and a large monitor. Size
counts and<BR>
chicks dig guys with big monitors. The faster the
computer the<BR>
more stuff you can run and the less reason you have to
waste time<BR>
with an organized approach. (Hint: Big problems make
you look good<BR>
in front of your boss. If you don't complain about
running out of<BR>
memory every month or so, people think you're not
making the<BR>
models complicated enough and they won't respect
you.). And always<BR>
use animation. Any problem worth solving is worth
animating.>><BR>
<BR>
<BR>
[There are also five new Webb cartoons pending but I
haven't had<BR>
the chance to scan, optimize and upload them yet -
stay<BR>
ned. -PB]<BR>
<BR>
</tt>
<br>
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Received on Thu Sep 20 19:59:00 2001