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Two short lines across a pipe, measuring flow by pressure drop.
Also known as: Flow restriction symbol, Differential pressure flow element
An orifice plate is a restriction in a pipe whose pressure drop measures the flow through it, drawn as two short lines across the pipe. It is the commonest industrial flow measurement and the least accurate of the usual choices, which is a trade-off against its low cost.
Measures flow by the pressure difference across a deliberate restriction, drawn as two short strokes across a process line.
Contexts: Technical drawing
Trades accuracy for cost and simplicity, being less accurate than most alternatives and having no moving parts to fail.
Contexts: Technical drawing
Two short parallel lines drawn across a pipe line, with a pair of tappings leading away on each side.