Quote:
Originally Posted by ton80
I have worked on LNG plants design and operations and in US NG pipelines. I also have dealt with the LPG Tank regulator safety shutoff issues. So here goes:
1. The original basic problem was identified correctly in above posts as opening the LPG tank valve when the burner valves were not closed. The safety treated the very low pressure as a leak and reduced the LPG flow to minimum. Just close the LPG tank valve; close all burner valves; finally open the LPG tank valves slowly wait a minute then open the burner valves and light off.
2. Insulating the LPG tank will not do anything good to eliminate the low flow propane vapor issue..
3. LPG vapors are not the result of sublimation which is vapors going from solid to vapor without going through the liquid phase.
4. Pipeline NG is not at low temperatures. Pipeline gas is typically at soil temperatures say 50 to 90F in Florida. There is no heater on Florida NG distribution systems. Sometimes there are recompression stations which may have some controlled releases for equipment isolation etc.
5. In a LPG tank, the liquid Propane is at equilibrium conditions with the Propane Vapor. If the tank heats up the vapor pressure increases until the safety valve relieves the pressure. This high pressure release is not caused by ambient temperatures unless there is a fire.
That is enough for now.
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Some additional advice can be found on Weber site : why wont your gas-grill get hot its probably in bypass mode
Why Won'''t Your Gas Grill Get Hot? It'''s Probably in Bypass Mode. | Burning Questions | Weber Grills
They list:
1. Bypass mode required since 1995 as a safety measure
2, How to avoid creating the bypass mode flow restriction.
3. How to get out of the bypass mode if you have the issue