You can get a Plan Review by an architect at the Fire Marshalâs Office, and they have satellite offices all over the state.
Primary flow element. A primary flow element is the element of a flow meter that serves to indicate the quantity or velocity of flow. For example, in the case of an orifice flow meter, the differential pressure across the orifice plate is the primary flow element.
The largest of the systems is the High Pressure Loop (HPL), which has the highest rated flow capacity and line pressure and is designed for major transportation pipeline metering; a Low Pressure Loop (LPL) for gathering and LDC applications is similar in configuration but smaller in scale and runs at lower flow rates and line pressures.