Orifice plate flow element with dp transmitter

ISA 5.1-2009/2022 (primary element symbols) / PIP PIC001

Drawn as

An orifice plate between a flange pair on the line (a bar across the pipe with a gap in the middle for the bore), with two impulse lines from the flange taps up to an FT bubble.

Meaning

Differential-pressure flow measurement. FE is the plate in its orifice-flange pair and FT is the dp cell. Fiscal and allocation meters, gas flow to flare and fuel. Model one item (orifice-flowmeter) for the FE+FT pair.

Variants

Simplified form: two short bars across the line with an FE bubble
A restriction orifice (RO) looks the same but has no taps
Orifice fittings (senior / dual-chamber) are drawn as a box labelled with the type