The flow element shall be constructed of an entrance sectio throat and holding flange section with a recovery cone. The entrance section shall be fabricated from CS 304ss 316ss fiberglass with a continuous nozzle radius into the throat section provided by Imperial to maintain upstream shear forces within boundary layer for maximum efficiency. The high pressure tap shall be located within this section. There shall not be any protrusion or exposed edges to allow solids to accumulate.

The throat section shall be fabricated from 304ss 316ss and shall have low pressure tap. Throat section shall mot be mechanically attached or inserted into the body of the flow tube. The high and low pressure metering taps shall be made a part of the holding floage and shall not require any drilling or tapping of the external pipeline.