Re: New at PipingDesign.com: 20 September 2001

From: <geoff>
Date: Thu Sep 20 2001 - 19:59:00 EDT


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

Comparison of ANSI and ISO Piping Systems (Pulp and Paper
Applications)
Avesta Sandvik Tube AB

&lt;&lt;Stainless steel pipes are widely used in the pulp and paper
industry.The share of stainless steel as piping material has
increased at these mills during the last five to ten years.The
reasons for this increase have been more corrosion aggressive
fluids and environmental aspects as processes have become more
closed. In the systems the fluid temperatures tend to rise and
concentrations of contaminants (slime and limestone) increase.
Also the original quality of raw water may be poor (for example a
high chlorine content,etc.) At the most recently built mills all
piping are of stainless steel except for steam and condensate
pipelines. (316Ti) are steels of this
kind.Ti-stabilized grades do
not bring any technical advantage compared to grades with a C
content below 0.05%.This paper focuses on the ANSI/ASTM 304L and
316L stainless steel grades.&gt;&gt;

Pumps
<a

href="http://www.pipingdesign.com/pumps.html"><a href="http://www.pipingdesign.com/pumps.html">http://www.pipingdesign.com/pumps.\ html</a></a>

Online Pump Selector
Impeller.net

Practical Piping Design
<a

href="http://www.pipingdesign.com/designpractical.html"><a href="http://www.pipingdesign.com/designpractical.html">http://www.pipingdesign.\ com/designpractical.html</a></a>

All You Ever Wanted to Know About DIN Piping Components (5MB+ PDF
File)
Avesta Sandvik Tube AB

&lt;&lt;This page should answer a lot of questions many of you have
dealt with in the past regarding non-ANSI piping component
dimensions and weights.&gt;&gt;

The Piping Network
<a

href="http://www.pipingdesign.com/pipingnetwork.html"><a href="http://www.pipingdesign.com/pipingnetwork.html">http://www.pipingdesign.co\ m/pipingnetwork.html</a></a>

&lt;&lt;Chris' Thoughts on Piping Design Automation

Q: I need some URLs for web sites where I can learn piping stress
analysis. A few e-books I can download would be OK, too.

  1. It's the easiest thing in the world. Just buy FEA software. It'll do everything you want. Look for the words 'user-friendly' on the box so you don't have to worry about bugs or input checking. Just ask the sales person if you're not sure--they're great guys. Don't worry about accuracy, either--that's what they pay programmers for. FEA makes all that mechanics stuff about stress and strain obsolete, so don't clutter up your desk with a lot of books. If the computer makes the number, it's right. Just remember that the red places on stress plots are bummers, everything else is cool. Make sure you get a big fast computer with a lot of megs and stuff and a large monitor. Size counts and chicks dig guys with big monitors. The faster the computer the more stuff you can run and the less reason you have to waste time with an organized approach. (Hint: Big problems make you look good in front of your boss. If you don't complain about running out of memory every month or so, people think you're not making the models complicated enough and they won't respect you.). And always use animation. Any problem worth solving is worth animating.&gt;&gt;

[There are also five new Webb cartoons pending but I haven't had
the chance to scan, optimize and upload them yet - stay
ned.&nbsp;&nbsp; -PB]

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