Pipeline underground or aboveground 2

[wenchop]

Hello, a steel insulated pipeline will operate with a liquid stream to be maintained at aprox 140°C and ambient temperature is aprox 15°C minimum, is there a rule of thumb that determines whether this pipeline cannot be buried/under-ground, and that it has to be above ground? I am thinking that there would be problems with mechanical stress from expanding/contracting, so it needs to be above-ground? Thanks in advance.

 

[wenchop]

Biginch:

I am a chemical engineer, not a mechanical engineer, doing some research, not any type or phase of design. In my projects we have installed Ethafoam successfully to manage expansion of pipelines with changes in temperature, this designed by certified stress engineers. Ethafoam is just another foam, it doesn't matter, what matters is the principle. Leaving some space in the Z bends for movement. I have nothing to do with selling Ethafoam or Dow. IN fact, before me, someone brought up another product

http://www.gilsulate.com/

which is why I thought of the foam.

My question is very simple, and relevant judging by the number of responses we have to date.

I suggest you hold your judgement before knowing.

 

[MortenA]

Logstor will provide pre-insulated pipes for district heating with a max temp of 140 deg C they use PE foam. They have systems for industry/oil & gas up to 150 (PUR) and combination glas wool and PUR up to 250 deg C

http://www.logstor.com

 

[LittleInch]

You don't work for them by any chance?? See the rules on promoting on this site. Looks periously close to it to me. There are a significant number of vendors offering suitable insualtion - that's not the point of this thread so please don't hijack it.

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way

 

[BigInch]

We could probably do without any brand names at all.
Surely until somebody asks for one.

I hate Windows 8!!!!

 

[EnergyMix]

Big & Little Inch, MortenA is a longtime site contributor, as you would recognize if you clicked on his name and looked at the date he joined and forums he frequents. He doesn't work for Logstor (and I don't either). I'm fairly certain he was trying to be helpful. Relax a bit guys.

Want to know the do's and don'ts of Eng-Tips? Read FAQ731-376.
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[LittleInch]

Ok, should have looked at a bit of history. It did look a bit odd though.

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way