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Elevation of flame arrestor

Elevation of flame arrestor

Elevation of flame arrestor

(OP)
I am trying to recall what the standards are for flame arrestors. I believe they must be 10-ft or more above a tank or building roof. Can anyone recommend a resource?
 

RE: Elevation of flame arrestor

There is no distance standard for the actual flame arrestor.
However there are lots of interesting standards for the end-of-pipe vent.
Typically you would mount the flame arrestor for ease of maintenance accessibility.

RE: Elevation of flame arrestor

FM & UL only limit maximum distance from end of pipe.  FM, I thing is 10-diameters, UL, 15-feet (I think).   

RE: Elevation of flame arrestor

US EPA also has a standard for end of pipe. I think it's 3 m above the surrounding highest point or equipment.

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