/ Field knowledge - IMC 502.7.4-502.7.6
A warehouse fan over a dip tank is not 502.7.
A dip tank, electrostatic spray line and powder booth are three process paths. The 2024 model IMC assigns them to 502.7.4, 502.7.5 and 502.7.6 respectively; 502.7.7 addresses floor resurfacing.
Educational 2024 model IMC 502.7.4-502.7.6. Confirm the locally adopted edition, material data and actual equipment. Packets: English PDF and Spanish PDF.
- Dipping, 502.7.4: mechanically ventilate flammable-vapor areas to prevent dangerous accumulation. Failure of any ventilating fan automatically stops the dipping conveyor.
- Electrostatic spray, 502.7.5: ventilate the flammable-vapor area under the applicable 502.7.3 spray provisions. Verify the spray system separately.
- Powder, 502.7.6: maintain atmosphere strictly below one-half the material's minimum explosive concentration (MEC); remove suspended nondeposited powder through exhaust ducts to the powder recovery system.
- Identify actual fan/duct construction and discharge. A collector recirculation proposal needs the separate 510.1.3 conditions; recovery alone does not authorize return air.
On the set, name the process, material MEC where relevant, design concentration, recovery route, and the dip conveyor fan-failure shutdown sequence. A warehouse circulation fan establishes none of these.
Related: dip and powder field screen, floor resurfacing under 502.7.7 and the Daily Code Talk archive.
What to send
Tank or booth layout, material data, exhaust and recovery diagram, airflow basis, and interlock sequence.
Check the actual process path
Send Project BackgroundEducational model-code summary only; no project-specific design or permit outcome is implied.