Purging new tanks
So I've got two new PP tanks. Tried to have them filled but they could only get gas into one bottle. The other tank took a tiny amount and just wouldn't take any more. The guy opened the bleeder scre...
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ScottG wrote:
Found a real service station (an actual shop) that sold PP and they knew exactly what to do. He unscrewewd the brass coupler from the fill hose and used it to relieve the pressure in the tank. It took several minutes for the pressure to disapate. After that he filled it in the regular manor by loosening the bleed screw.
No wonder PP wouldn't go in, there was a LOT of pressure in there.
He went on to explain some have pressure and some are "pre-purged". The latter are under a vacuum and ready for filling.
Thanks everyone for all your input!
Still wasn't purged....just relieved the shipping air (up to 100#) and filled it.
Now you have a cylinder with liquid propane, propane vapor mixed with air.
Could result in popping noises, moisture in the air freezing up in regulator, moisture in air rusting out inside of cylinder, improper mix of propane/less btu, odorant fade (mercaptan oxidizes)----
That is why purging requires exchange of Vapor 3-5 times to REMOVE the air.
Sorry but that service station got it filled but not purged.
