Answer / ashwani kumar

I had never came across this situation.
Orifice creates a pressure drop across the plate and hence measuring the pressure on the upstream doesn't provide any significance. Pressure after the orifice always carries significance.

Answer / sony cherian

Orifice plate is no need for PT, Orifice is only used for DPT

Answer / uttiya hazra

Pressure transmitter is not installed before up-stream of an orifice plate because in the region of up-stream there exists a pressure differential or pressure gradient.

Answer / jaffer

When the flow is restricion on a orficie plate that time HP side flow of pressure decrease&velocity is increase .

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