Gasboy Atlas Fuel Systems Installation Manual - Manual (Page 17)

MDE-4331M Atlas® Fuel Systems Installation Manual · September 2014 Page 3-1
Classifying Hazardous Locations Hazardous Locations
3 – Hazardous Locations
Classifying Hazardous Locations
Any activity (such as smoking or drilling) that can cause an explosion must be done well
outside the vapor area.
Figure 3-1 is based on National Fire Protection Association (NFPA) 30A and NFPA 70 ® .
Figure 3-1: Hazardous Locations Diagram
20'
20'
20'
*DEF dispensers located outside the 20 feet area are unclassified.
Notes: 1) Not applicable to DEF-only dispensers.
2) DEF is not flammable and does not generate explosive vapors. For any requirements, consult local regulatory agencies. For
example, units dispensing DEF and diesel must follow the flammable fuel regulatory requirements.
20’
18”
Unclassified
18”
Vapor Barrier
20’
DEF
18” 18”
18”
48”
Division 1
Division 2
Division 2 Division 2*
18”
18” 18”
Division 1 Division 2
Dispenser Without Vapor
Barrier Construction Dispenser with Vapor
Barrier Construction
Class 1 Division 1
(Hazardous Location)
Class 1 Division 2
(Hazardous Location)
Vapor Areas
Fuel Containing
Components