Leak detection in tanks

[drax]

I'm looking for a way to detect a leak in a sealed tank. Currently, we pressurize the unit with air and submerged in a water tank to check for leaks. Is there a better, faster way? Does anyone know how they do pressure vessels?

 

[Rich2001]

Three method s come to mind range in sensivity: Bubble testing, Halogen Leak testing and Helium Leak testing

1. Bubble testing charge the vessel with a gas and check for leaks with a soap bubble solution.

2. Charge the vessel with a mixture of nitrogen and a Halogen, use an electronic halogen leak detector (not a torch type) examine for leaks.
Here is a link:

http://www.omega.com/techref/ph-4.html

3. Helium Leak detector - here is more information:

http://www.vic-europe.com/msg2.htm

I hope these help, from what you describe I would loook at the halogen leck detection method, though a EPA certified technican maybe required to handle the halogen (HCFC)

Good luck, Rich

 

[ksuengrng]

Drax:

Bubble testing is a good, quick, inexpensive way to go. We used this method quite extensively and found it very useful.

When we pressure tested our vessels, it was a whole different animal. We would hydrotest the vessel per ASME standards. The vessel would be completely filled with water, completely meaning absolutely no air pockets. Once the pressure was obtained, usually 1 1/2 times the design pressure, or operating pressure, we would hold it for the required amount of time. Anywhere from about 15 minutes on, sometimes depended on our Authorized Inspector, or the length required for the "walk-around". If no pressure loss was noticed, or no leaks present during the "walk-around", test was accepted.

Scott

 

[drax]

This is great! never thought about Halogen, great tip and lead!! Thanks everyone.