Design and equipment selection for use in hazardous areas will be influenced by :-
As stated above, this document focuses on the international standards developed especially for the electric heat tracing, IEC62395 - for Safe Industrial locations and IEC60079-30 - for Hazardous locations.
The probability of explosive conditions being present is defined by zone classification
North American hazardous locations are categorised in Divisions rather than Zones. As stated above, IEC60079 and IEEE515 are being harmonised as a dual-logo standard. Therefore ETHIC's members product approvals will often cater for both Division and Zones.
Gas Groups relevant to heat tracing in hazardous locations are :-