Spiral seam welded pipes

From: <A.R.Mani>
Date: Sun May 08 2005 - 01:25:00 EDT

Dear Friends

As far as I am concerned and with the limitted experience that I have , use of spiral seam welded pipes is rare in the petrochemical industries specially here in Iran, where I work.In the enormous and numerous petrochemical plants exist here , one can not find this kind of pipe for any service , maybe due to the nature of the weld which is a weakness by itself.The less weld in the piping system the less defect would be there.
This kind of pipe is defined in API 5L and is a standard one and is widely used for long runs of pipes to carry gas between the cities and countries even. Recently we have dared to use this pipe in our ongoing projects for cooling water service while, as I said , this has not been used in other old existing plants in the country.
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.

Cheers

Reza

PS:Hope that my question would not look like a homework to be replied by torrents of ironic delicate technical answers.

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[Non-text portions of this message have been removed] Received on Sun May 08 01:25:00 2005