API RP 500/505 & NEC Article 500
Higher pressure may increase classified area extent for some sources.
Understand electrical area classification principles and code requirements
Electrical area classification defines hazardous zones around equipment where flammable gases may be present, determining what type of electrical equipment can be installed.
It calculates Division 1 and Division 2 hazardous area extents per API RP 500, API RP 505, and NEC Article 500.
Division 1 areas have flammable concentrations under normal operations, while Division 2 areas only have flammable concentrations under abnormal or fault conditions.