"Modificatopn" of Hazardous Zones
"Modificatopn" of Hazardous Zones
(OP)
European Standards provide "Concept of Walls" to modify Hazardous Areas. For the light gases, a wall located close to the potential gas leak makes hazardous area on the top of the wall,plus little beyond but generally another side of the wall is unclassified area.
/Book - A.Mc.Millan "Electrical Installations in Hazardous Areas"/
I am checking American Standards - API, NPFA but I didn't find this concept here.
Is this "Concept of Walls" is covered by International ISO Standards.
Our problem - Hazardous Area Zone2 (light gas leak) goes 3-4 ft beyond a fence where is private property.
/Book - A.Mc.Millan "Electrical Installations in Hazardous Areas"/
I am checking American Standards - API, NPFA but I didn't find this concept here.
Is this "Concept of Walls" is covered by International ISO Standards.
Our problem - Hazardous Area Zone2 (light gas leak) goes 3-4 ft beyond a fence where is private property.






RE: "Modificatopn" of Hazardous Zones
For example, a natural gas leak from a piping flange etc. would typically be only 1.5m radius under IP-15(2002).
See if some remedial work is possible to reduce the size and location of the hazardous area, e.g. restricting the size of the release or relocating the release point.