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A fitting with a hatched element stopping flame travel.
Also known as: Flame arrester symbol, Flame trap symbol
On a piping diagram a flame arrestor is drawn as an in-line fitting containing a hatched element, which quenches a flame front and stops it passing along the pipe.
Denotes a device that quenches a travelling flame and prevents it propagating through the pipe.
Contexts: Technical drawing
Works by absorbing heat in narrow passages, so a fouled arrestor both blocks flow and stops protecting; it appears on drawings with maintenance access for that reason.
Contexts: Technical drawing
A short rectangle in the flow line containing closely spaced hatching representing the arrestor element.