How cold for above-ground LP tanks to have issues?

sunlight35

What's the typical low temperature for above-ground propane tanks not able to provide sufficient gas pressure needed for boiler? My boiler requires a minimum pressure of 10 w.c.

GroundUp

As long as you keep it above 5% full, you'll never see weather cold enough to cause problems.

EBEBRATT-Ed

What @GroundUp said

Above ground tanks are quite common. Not an issue

Oliveone

That funny

Solid_Fuel_Man

There is a formula for wetted surface of the tank (how full it is and type of tank), outside temperature, and btu/hr draw of vapor. 

Technically, at -45F the liquid will not vaporize. 

Zman

Above ground tanks usually don't have issues. I do have a client with a 4,000 gallon tank and over 6,000,000 attached load in climate zone 7. They have issues and need to run a vaporizer to make it work.
How big is the tank and boiler?

EBEBRATT-Ed

Yes the tank has to have enough surface area to be able to absorb heat to vaporize the liquid based on the connected load

Robert_25

It depends on your btu load, and how full the propane tank is.  Google "propane tank vaporization chart" and you will see what I mean.  

At -45F you could store the propane in a 5 gallon pail.  

sunlight35

Thanks, I think I was mistaken w.c. for psi.

hot_rod

Zman said:

Above ground tanks usually don't have issues. I do have a client with a 4,000 gallon tank and over 6,000,000 attached load in climate zone 7. They have issues and need to run a vaporizer to make it work.
How big is the tank and boiler?

I was on the maintenance team at Snowbird resort when it was first built, all LP boilers. The vaporizers were in a concrete vault in an avalanche path. Talk about a scary appliance to work on.
They finally ran a NG line up the canyon.