Re: Coking Plant Conveyors & Atex
Does the coke give off a gas that may be explosive?
If yes, is the gas released in significant quantities?
Is the concentration of gas in ambient air above the conveyors such that a "potentially explosive atmosphere" may exist?
If there is no potentially explosive atmosphere then no ATEX.
If there is a potentially explosive atmosphere then ATEX applies and the Zone will be selected according to the period the potentially explosive atmosphere actually exists. Suggest you go to the conveyors with instrumentation and measure the actual conditions around the belt. ■
Re: Coking Plant Conveyors & Atex
If it is open air belt conveyors it is highly unlikely that minimum explosive concentration will be achieved from gas released by coke. If no dust is present in my opinion you will not have to zone it. ■
Coking Plant Conveyors & ATEX
In a coking process for a power plant, there are belt conveyors. Considering that they are in an open air installation, is the region above the conveyor to be considered as classified location (Zone 1 or 2)?
The coke temperature is expected to reach 40 C. The moisture content is not known at moment. Does anybody have an area classification drawing from a similar plant, that indicates the region above the conveyor as a classified one?
If in the event of a classified location in such region, how could we lower its classification, is to say from a given Zone 1 to Zone 2? Or considering that he classification was done under the worst scenario, is not advisable to change the original classification? ■