I recently installed a propane outdoor fire pit. The pit has a 28" diameter steel ring surrounded by landscape block. I then filled the pit with gravel and then a layer of lava rock up to my stainless steel 19" round burner. On top of the ring I put on fire pit glass. I ran approx 8' of black iron pipe underground to hook to a standard 20# propane tank. Do I need to worry about the propane pooling underneath the ring and exploding? The whole pit is filled with gravel so there really isn't anywhere for the gravel to "pool."
Are you saying the ring is sealed around the burner? Can you post a picture of what your dealing with? I would assume its not air tight enough to trap gas. Atleast not enough to explode anymore then a grill.