Blind flange symbol
Also called Blank flange
A blind flange closes off the end of a pipe or nozzle.
What the blind flange symbol means
A blind flange closes off the end of a pipe or nozzle.
How it is drawn
A thick short line across the end of the pipe.
The blind flange symbol in each standard
US legend (PIP PIC001)
Drawn as on most US-style legend sheets.
German (DIN): Blindflansch. See DIN P&ID symbols.
Where you see it on a P&ID
On spare nozzles, future connections and test points.
Related symbols
Frequently asked questions
What does the blind flange symbol look like on a P&ID?
A thick short line across the end of the pipe.
What is a blind flange used for?
A blind flange closes off the end of a pipe or nozzle. You will find it on spare nozzles, future connections and test points.
Is the blind flange symbol the same in ISA and ISO?
No. The line ends at a flange pair. A single flange is X8152. The ISO 10628-2 registration number is 517. Always check the legend sheets at the front of the P&ID set.
What is the blind flange called in German?
Blindflansch. On a German R&I-Fließschema it is drawn to DIN EN ISO 10628-2.
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