Spraying and Dipping
Permit Holder Guideline #38
PERMIT TITLE: Spraying and Dipping
CODE SECTION: (Virginia Statewide Fire Prevention Code) 1501.2
SCOPE:A permit to conduct a spraying or dipping operation utilizing flammable or combustible liquids, or the application of combustible powders.
FEE: $75.00 (Check payable to the City of Richmond)
PERMIT EXPIRATION: ONE (1) year from date issued.
REQUIREMENTS: Permit holder agrees to abide by the Virginia Statewide Fire Prevention Code and any special stipulations noted on permit, as well as the following:
- Submit description of operation (including maximum amount of hazardous materials,
with MSDS for each), safety provisions, and floorplan showing location of operation
(including size of tanks). Area to comply with building, electrical, and other applicable
codes.
- Electrically ground metal in spray area (including work pieces). Electrically
bond containers when transferring flammable mixture. Containers supplying spray
nozzles shall be closed.
- Required exhaust or ventilation system to be on when spraying.
- Containers and piping to which a hose or flexible connection is attached shall
have shut-off valve at the connection; and that keep valve closed when hose not
in use. An approved relief valve shall be provided where flammable or combustible
liquids are supplied to spray nozzles by positive displacement pumps.
- Post and enforce "No Smoking" signs. No open flames within 20 feet of spray
area. Welding, cutting, and similar spark-producing operations shall not occur in
or near spray areas or dipping or coating operations unless proper safety provided.
Only non- sparking tools shall be used in areas where organic coatings are stored,
mixed or applied.
- Protect against accumulation of vapors, self-ignition, and excessive heat
where heat involved.
- Residue control shall be maintained. Spill material shall be properly removed.
Spraying areas, including exhaust duct, to be kept free from accumulation of deposits
of combustible residue. Cleaning tools to be of nonsparking materials. Used rags,
filters, residue, and waste to be put in self-closing, non-combustible containers,
emptied at the end of each shift (at least daily).
- Not use same spray area with materials susceptible to spontaneous heating
and ignition, or otherwise react, without removing all deposits from area; including
exhaust, and change filters.
- Portable fire extinguishers per NFPA 10 (appropriate for hazard). Maintain
and periodically inspect and test fire protection devices and systems per code.
Staff trained for emergencies.
- Handle organic peroxides to avoid shock and friction that produces decomposition
and violent reaction hazards.
- Dip tanks and drain boards must be of non-combustible materials; their supports
of heavy metal, reinforced concrete or masonry (all to comply with NFPA 34). Tanks
over 150 gallons or 10 square feet liquid surface area to have trapped overflow
pipe to outside, and an automatic fire- extinguishing system or automatically closing
cover (capable of manual operation). Tanks over 500 gallons shall automatically
drain quickly if fire (with ability for manual operation at safe location), to an
approved outside location. Conveyor systems shall automatically stop if fire.
- Electrostatic apparatus and devices used for paint-spraying or pain-detearing
operations shall:
- Have sign noting sparking distance and to keep items twice that distance away.
- Sign designating process zone as dangerous for fire and accidents, identifying
grounding requirements for all conductive materials in spray area (including persons),
area restricted to qualify personnel only.
- Interlock hand electrostatic equipment so cannot operate unless ventilation
system on.
- Automatically disconnect the power supply to the high-voltage transformer
and signal the operator when any of the following occur:
- Ventilation fan stops or fails
- Stoppage of conveyor carrying articles past the high-voltage grid
- Occurance of a ground or an imminent ground at any point of the high-voltage
system
- Reduction of clearance less than twice the sparking distance
- Additional permits may be required to handle or store hazardous materials,
or to use torch or arc to cut or weld and similar "hot work". An inspection of your
facility is required before these permit applications will be processed.
