Re: Re: Spiral seam welded pipes

From: <A.R.Mani>
Date: Sun May 08 2005 - 10:35:00 EDT

Thanks jculf. I am sure in designing and constructing the uranium extraction plant the American standards would not be followed. As I said, I am working in a fertilizer (chemical one of course) production project and it is just for export purpose .Please have a look at this link <a href="http://www.nipc.net/spe2/pars.htm">http://www.nipc.net/spe2/pars.htm</a> it worths the effort.Unfortunately our project does not have a link now but you can enjoy the others.Our plant is in the vicinity of Ethane Recovery Plant.

Going back to the subject , I am sure that seamless pipes are much more expensive than the welded ones of the same size and for large bore sizes it is much easier and cheaper to use spiral seam welded pipes instead of straight seam ones , but , I would like to know if anyones has the experience of using spiral seam pipes in a process plant in lieu of straight seam welded pipes , for example for natural gas , LPS or , Nitrogen , flare gas and etc.

Cheers and thanks for the time you paid to collaborate.

Reza

jcluf <jcluf@yahoo.com> wrote:

• In PipingDesign@yahoogroups.com, "A.R.Mani" wrote: Your concerns are well warranted... take a look at B31.3 we have some limits and other guidance on the use of this pipe. However, its low cost and use in tamer services are a good combination. Seamless pipe for cooling water is definitely an overkill in comparison to spiral wound pipe.

I would strongly recommend against its use at high temperature 600F and up the welded seam presents a real hazard especially if you try to go into the creep range T>~800F. (Ref B31.3 2004)

So as you design & build your uranium extraction plant(s) you may want to keep
this in mind.

> I would like to know your experience and idea about this and what do
you think about the advantages and disadvantages of this kind of pipe in comparison with other welded type pipes regardless of joint efficiency and cost.Have you had any experience of utilizing this kind of pipe for any process service?
> Your collaboration would be appreciated.
> been removed]

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[Non-text portions of this message have been removed] Received on Sun May 08 10:35:00 2005