Message Board Thread - "In Floor Pipe Leak"

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In Floor Pipe Leak Heat Seeker 9/8/2006

RE: IR job.

I was contacted by company about a problem at an Ice Rink were they are losing a lot of the Brine in the in floor pipe (black PVC) used to make Ice on the concrete when flooded with water and then to keep the ice frozen. They want to take images of the floor system that is not working properly. They want to find where the system is leaking without having to tear up the entire concrete floor. Should this not work in the same manner as in floor heating but looking for cooler areas instead of hotter?

Any advice from the experienced Thermographer out there.
Thanks in advance
Stuart
heatseeking@telus.net
 
Re:In Floor Pipe Leak Dnicejr1 9/8/2006
What type of pressure are they running in the system? You might want to consider using ultrasound to listen for the leak if the IR doesn't show it.
 
Re:In Floor Pipe Leak Gary Orlove 9/11/2006
A paper was written on this subject years ago. Here is the title and abstract. It is available for purchase from http://www.spie.org/ . Search the Thermosense proceedings.

A case study of applying infrared thermography
to identify a coolant leak in a municipal ice skating rink - Jay R. Wallace, Wallace Thermographics Company, P. 0. Box 8292,Richmond, Virginia 23226

ABSTRACT
This paper deals with the application of infrared imaging radiometry as a diagnostic inspection tool for locating a concealed leak in the refrigeration system supplying glycol coolant to the arena floor of an ice skating rink in a municipal coliseum facility. Scanning approximately 10 miles of black iron tubing embedded in the arena floor resulted in locating a leak within the supply/return side of the system. A secondary disclosure was a restriction to normal coolant flow in some delivery loops caused by sludge build-up.

Specific inspection procedures were established to enhance temperature differentials suitable for good thermal imaging. One procedure utilized the temperature and pressure of the city water supply; a second the availability of 130F hot water from the facility's boiler system; and a third the building's own internal ambient temperature. Destructive testing and other data collection equipment confirmed the thermographic findings revealing a section of corrosion damaged pipe. Repair and flushing of the system was quickly completed with a minimum of construction costs and inconvenience. No financial losses were
incurred due to the interruption of scheduled revenue events. Probable cause for the shutdown condition was attributed to a flawed installation decision made 15 years earlier during the initial construction stage.

Gary Orlove
Infrared Training Center
 


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