Orifice Flanges shall be installed in horizontal pipe runs, wherever possible.Orifice flanges shall be located adjacent to walkways, platforms, or structures.Depending on service, orifice flanges can be mounted in the vertical and the horizontal sections of piping as per instrument hookup drawing.Care should be taken at horizontal banks of lines to allow for adequate space for side mounted taps and when required, close-coupled transmitters.
PRINCIPLE APP DOUBLE TAP PORTABLE
Orifice flanges need not be accessible from grade or a platform but should be positioned at a location and elevation that can be reached by a portable ladder.Differential pressure is proportional to the flow velocity and density of the fluid. Increase in velocity due to reduced cross section results in reduced pressure. Orifice Flow Meter works on the principal of reduced pressure just downstream of orifice plate due to reduced flow diameter for the fluid. a control valve or vessel level controller). Tapping connections are normally 1/2″. The transmitter is located adjacent to the assembly before it is connected to the remote panel and controlling device (e.g. Complete assembly consists of an orifice plate, orifice flanges, bolts and gaskets along with valved tapping connections to differential pressure transmitter. It consists of an orifice plate with a pair of orifice flanges, which are tapped to receive sensing connections. This is the most common type of flow meter used in process industry.
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