HOT RADIATOR HOSE IN CONCRETE?
HOT RADIATOR HOSE IN CONCRETE?
(OP)
I want to run four 6" remote radiator line 3' deep in ground. My mechnical engineer is saying that the pipe temp. will go up to 250 DEGREES (F) and will expand 1" every 10'. I am running approximately 80' of this pipe. Does anybody have any recommendations or experience on this type of construction? Please give me some hints on what type of materials to be used for encasing these kind of pipes underground...concrete...insulations. If possible, what type of insulation should be used....
I would really appreciate it!!!
I would really appreciate it!!!





RE: HOT RADIATOR HOSE IN CONCRETE?
http://www.google.com/search?q=insulation+buried+pipe+hot+water&hl=es&btnG=B%FAsqueda+en+Google&lr=
and good luck!
RE: HOT RADIATOR HOSE IN CONCRETE?
If your radiator pipe is to be manufactured from steel, then I suggest that you go back to your mechanical engineer, and ask him to confirm his figure of 1 inch per 10 feet at 250 degrees F. (or better still, calculate it for yourself
Assuming that it WILL be steel, then the accepted coefficient of thermal expansion is 0.0000065 per degree F.
If we assume that the pipe will be installed at only 10 degrees F, then you would get 0.0000065*120*(250-10) = 0.19 inches expansion per 10 feet, or 1.5 inches per 80 feet.
RE: HOT RADIATOR HOSE IN CONCRETE?
You mention isulation but also call this radiator pipe. Is this a ground loop for a heating/cooling system? You may need a ground loop and a heat exchanger. The ground loop would run a lower temp and be filled with non corrosive fluid. Whatever you are cooling is above ground where you have access.
roger
RE: HOT RADIATOR HOSE IN CONCRETE?
As for insulation, there are numerous ways to insulate the pipe from "soft wrapping" with soft insulation to using rigid insulation. Further, you can isolate the movement with a flexible connection at either end of the pipe run.
Plan ahead for potential repairs. If you encase in concrete, it will be difficult to pull and repair the line in the event of a leak. If you create a mechanical "chase" from concrete, you will then be able to insulate the pipe and access the pipe for inevitable future repairs.