Munitions Explosives Flooring

4145.26 and NFPA99 Approved  Munitions Flooring

There are many industries that handle materials, which under the right conditions, can ignite, causing a fire or explosive event.   These areas require 4145.26 or NFPA99 approved epoxy flooring.  Flammable storage or processing areas, munitions, or even handling of combustible bulk solids.  Conductive flooring is the one thing that ties together all the surfaces electrically, in a processing or storage area.

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Dangerously high charges can lead to ignition hazards caused by static charges during industrial processing.  A dangerous event can occur when two situations exist at the same time. This includes both a dangerously high charge, and a potentially explosive atmosphere.  In contrast, these conditions can occur during the handling of non conductive, combustible liquids such as non conductive, combustible bulk solids, or hydrocarbons.  Sometimes even conductive materials can accumulate dangerously high charges if they are being processed in non conductive equipment.

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1) What is "explosion proof conduit"? Googling was remarkably unhelpful.

2)Since this 2" conduit is just that - a conduit - and is open on both ends, is the explosion proof part really necessary? It is not under any pressure itself, though it allows passage of a hydraulic line and air line that are.

The conduit I'm asking about is the white pipe in this photo:


The horizontal section will be under 6" of concrete, and the vertical section will be inside a 6" framed wall.

My concern is actually not with safety, since if one of the pressurized lines did burst, the pressure would be released out the ends of the conduit into the lift or into the air. My concern is with a plumbing inspection I need for the radiant heat tubing, and the fact that they'll see the conduit and start asking unnecessary questions.

I'll call Rotary and the installation company in the morning, but would like to use today to work on any problems.

Thanks,

Mark

The installation manual for my Rotary in-ground lift specifies "explosion proof conduit, per code" be used between the control box and the in-ground lift mechanism, but the installation company said to just use plain ol' PVC. My question:1) What is "explosion proof conduit"? Googling was remarkably unhelpful.2)Since this 2" conduit is just that - a conduit - and is open on both ends, is the explosion proof part really necessary? It is not under any pressure itself, though it allows passage of a hydraulic line and air line that are.The conduit I'm asking about is the white pipe in this photo:The horizontal section will be under 6" of concrete, and the vertical section will be inside a 6" framed wall.My concern is actually not with safety, since if one of the pressurized lines did burst, the pressure would be released out the ends of the conduit into the lift or into the air. My concern is with a plumbing inspection I need for the radiant heat tubing, and the fact that they'll see the conduit and start asking unnecessary questions.I'll call Rotary and the installation company in the morning, but would like to use today to work on any problems.Thanks,Mark

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