Does an explosion-proof doorway require positive pressure ventilation?
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The entrance hall is as shown; both the left and right sides are identical workshops, all classified as Class A. Is positive pressure ventilation required for this entrance porch? Then what is the purpose of providing positive pressure ventilation here? If it’s a non-explosive area on the side, that makes sense – to prevent dangerous gases from escaping – but is it still necessary to have this setup when both sides have the same function?
In workshops of Category A and B where bucket chambers are installed, we do not provide positive pressure ventilation； Is this the case where two different fire compartments share the same evacuation staircase? Can the fire department get through in this situation?
I asked my former colleague, and he said it’s necessary to make such arrangements: first, to prevent dangerous gases from accumulating in the doorways, and second, to stop those gases from leaking into the evacuation areas after an explosion and causing danger. What do you all think?
Explosion-proof doorways are not designed to have openings in them; how can ventilation ducts be installed?
We handle fewer chemical engineering projects; in the past, we only provided positive pressure ventilation for positive pressure chambers located in explosive areas. Recently, the requirements for design reviews stipulate that explosion-proof doorways must also have positive pressure ventilation; I am currently in communication with the review team regarding this.