Morphea is a localized or limited form of scleroderma, a condition that can cause a wide variety of problems, from skin discoloration to difficulty with the function of joints and muscles and other connective tissues. Morphea typically appears on your abdomen, chest or back, but it can affect your face, arms and legs.
There are 27.7 inches of water column (wc) pressure in 1 PSI of pressure. So 7wc is about 1/4 PSI. This is the normal pressure that household natural gas is delivered. The normal delivery on propane (LP), for household use is 11wc or a little more than 1/3 PSI. Both of these pressures are the result of the regulators on the gas line. In the case of natural gas, the meter acts as a measure of volume (so you can get a bill) and as a regulator.
Stationary Propane Installation. Pictured above is the most common standard two stage propane system. Two stage systems have a high pressure regulator at the propane tank. The gas line from the high pressure regulator runs over to the Low pressure regulator at the home. Propane is categorized three ways: 1  Tank Pressure-Unregulated pressure in any size propane tank or cylinder can range on average from 80 to 250 psi. bullet. 2  High Pressure-The unregulated tank pressure is now regulated and maintained at a constant outlet pressure between 8 to 12 psi no matter what the tank pressure may be.