Helium Testing
Pinpoint leaks in underground piping and reduce excavation costs.
How does helium testing work?
First, injects the piping or vessel with helium gas. Why? Helium is the lightest inert gas and will escape from any leaks in the piping or vessel quickly. This means that helium will penetrate the surface easily. Helium gas is also ideal because it will not react with other elements making it safe to mix with hydrocarbon vapors.
After injecting the system with helium gas, our state of the art helium detector will pinpoint any cracks or holes in the piping or vessel by identifying helium gas in the problem area. This is an extremely accurate and sensitive method of locating leaks.
Helium testing drastically reduces the time needed to pinpoint leaks. Helium testing is also very inexpensive when compared to traditional methods of pinpointing leaks such as excavation and visual leak inspection.
Leakage rates are depending test item. Tanks, underground piping, test resolution by test equipment, exchanger tubes testing etc.,
VC RAO
-----Original Message-----
From: ARIF JAVED-IBNRUSHD
Sent: Sunday, May 09, 2004 10:13 AM
To: PipingDesign@yahoogroups.com
Subject: RE: [PipingDesign] HELIUM LEAK TEST
Helium leak test is basically a Process Licensor requirement. For
Example in the production of PET even a small amount of O2 will ruin the
Polymer Quality.
Therefore, in this case we use a special gasket called "Lip Joint
Gaskets" . They are SS316 highly polished gaskets which after joining
together further seal welded to tight joints.
What we do after that is pull vacuum in the system and put tap around all such joints. Make a pin hole in one location of the tape and spray helium near that hole. The helium detector is placed at the top of the system under observation. If any helium is sucked in it will be picked up by the detector.
This detection is very time consuming job a requires a lot of patience. You will have to do small circuits each time until the complete job is finished. And you can well imagine the pain of finding the exact location if the leak is detected in a big flange like 12 in or above.
Regards
AJ
-----Original Message-----
From: e-Director [mailto:segip@tm.net.my]
Sent: Tuesday, May 04, 2004 7:35 PM
To: PipingDesign@yahoogroups.com
Subject: [PipingDesign] HELIUM LEAK TEST
Does anyone know how to conduct/method for helium leak test??
Acceptable leak rate according to any Standard????
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