NFPA 30 Fuel Dispensing area - extract fan to be spark resistant? 1

[MMAnd]

Hello

I am working on a simple extract system for a diesel fuel dispensing area.

NFPA 30 guides the required extract CFM from the room to control the vapour concentration to max. 25% of the lower flammability limit (LFL).

I see no stipulation that spark resistant extract fans are required (including in the related NFPA 91).

What is the consensus on whether spark resistant extract fans are required? The reason I ask is that there are numerous NFPAs that cover battery room hydrogen gas extract (same principles regarding keeping the concentration less than 25% LFL), and although spark resistant construction is not mentioned (as far as I can see), I have seen it specified numerous times.

Thank you

 

[goutam_freelance]

See NFPA 30 Clause 6.4.

Explosion protection design to be adopted as required after hazard analysis.

 

[georgeverghese]

Diesel is combustible, not flammable, as long as max normal room temp / diesel container temp is < 55-60degC.
On the other hand, you may wish to ventilate the room from a HSE perspective to keep aromatics ( BTEX) concentrations with limits permitted by local authorities