How to pressure check propane system
Trying to pressure check my propane system after doing some repairs. Thought I would just blow air pressure into my auxiliary connection. The regulator is leaking as fast as I can put the air in-almos...
Forum Discussion
Stim wrote:dougrainer wrote:Stim wrote:
DO NOT PUT HIGH PRESSURE AIR IN THE TANK!!!
Look up how a diesel engine works. Fuel, compression, ignition.
There will be residual LP fumes in the tank even after 20 years.
I have welded/repaired fuel/gas tanks for years.
Even climbed into tanker trailers to do it.
You have to know what you are doing.
They use high pressure air to QC the tanks after build. They also leave that air in them from the RV OEM, and the LP filler must drain and purge the tanks at first fill. Both ASME and DOT have hi pressure air in them. So, the OP puts in air and verifies the fix then has the LP filler drain and purge and fill. As YOU stated, you have to know what you are doing, which on LP you do not. There is no problem injecting air pressure into the tank to check the system without having to install LP and then drain if the problem is at the tank itself. Doug
The problem with your post is that NEW tanks have never had combustible products stored in them!
If you can't "Clear" a used tank then you can use an inert gas like nitrogen
to pressurize it.
Perhaps it is you that don't have the experience because you overlooked the obvious.
Are you aware that used DOT cylinders can be recertified using a "proof-pressure" test that subjects them to air pressure at double the rated service pressure? Cylinders recertified by the proof-pressure method don't need recertifying again for 7-10 years instead of 5 years for visual recertifications.
DOES MY L/P TANK NEED TO BE RE-CERTIFIED?
