pipe passing through proposed concrete wall

[maneesha0702]

I am designing a wall around existing pipe through which liquid passes at 200degrees fahrenheit. What precautions should I take for laying concrete. Should I install any sleeves?

 

[JedClampett]

Additional details would help. Does the penetration need to be watertight? Weather tight? What's the wall for? What is the pipe material? Is it insulated?
The obvious answer is to have a sleeve that provides a gap between the pipe and the concrete. That 200 degree pipe is going to want to move, so why lock it in? Plus any concrete poured directly against a pipe at 200 degrees is going to be pretty bad.

 

[maneesha0702]

Thanks. The penetration need to be watertight. The wall is for containing liquid on one side in case of spill. The pipe material is carbon steel. What kind of sleeve is advisable in these conditions?

 

[CELinOttawa]

A purpose-made one... I'm not being sarcastic. With high-temperature fittings, there are multiple interacting concerns. This isn't just about not backing the concrete while it cures, but allowing the pipe to expand and contract without requiring prolonged and continuous maintenance.

 

[JedClampett]

You need to have sleeve (preferably steel) with a weep ring poured into the wall. To seal it and provide flexibility you need to use a product like Link Seal. It fills the gap between the pipe and the sleeve, is leak proof and is flexible enough that it won't rip out with a little movement.
I couldn't find the sizing chart on that web site linked below, but a little searching on the web should get you one. The sleeve will need to be about 1 1/2 inches bigger all around than the pipe, but use the sizing chart.
As a caution, due to its flexibility, the link seal does not provide a support point. You can't count on a support at the wall.

 

[LittleInch]

Not many details to go on here, but my worry is about the pipe not the wall. Stress concentrations at wall penetrations are a major cause of pipe failure if either the pipe or the wall settle and your small clearance between pipe and sleeve disappears, but if you have a seal no one can see it happening or really do anything about it. If the pipe is existing, but the wall is new, how much of the pipe is exposed whilst you do the digging? Is it supported? Link seal is a pretty good solution, but pipe penetrations through walls, especially if any thermal expansion / contraction does occur are notorious for leaking over the long run.

Have you considered re-routing the pipe?

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