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A line with a bowed membrane, bursting to relieve pressure.
Also known as: Bursting disc symbol, Rupture disk symbol
On a piping diagram a rupture disc is drawn as a bowed line across the pipe, a membrane designed to burst at a set pressure and relieve the system once only.
Denotes a membrane that bursts at a set pressure to relieve the system.
Contexts: Technical drawing
Operates once and must then be replaced, which is the essential difference from a safety valve that recloses.
Contexts: Technical drawing
A short bowed line drawn across the flow path, curved towards the direction it will burst.