Dipping and Coating Operations (Diptanks)

Chapter 296-835, WAC

Effective Date: 10/01/02

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A


ACGIH (American Conference of Governmental Industrial Hygienist)

reference, Industrial Ventilation: A Manual of Recommended Practice, ACGIH Standard (22nd ed., 1995), 835-11010

Adjacent area

controlling ignition sources, 835-12040

definition, 835-140

Airborne concentration, lower flammable limit, 835-11010

Air cleaning device, recirculated air, 835-11015

Air contaminants, employee exposure, 835-11010

Airflow

checking adequacy (inspection), 835-11015

spray cleaning and degreasing, 835-13030

Air velocity, 835-13030

Alarm

hardening or tempering tanks, 835-13005

recirculated air, 835-11015

set point, 835-13005

ANSI (American National Standards Institute) Standards Practices for Ventilation and Operation of Open-Surface Tanks, ANSI Z9.1-1971, 835-11010

Fundamentals Governing the Design and Operation of Local Exhaust Systems, ANSI Z9.2-1979, 835-11010

Approved, definition, 835-140

Approved equipment

flow coating, 835-13015

liquid can drip or splash, 835-12045

paint detearing (electrostatic equipment), 835-13010

recirculated air, 835-11015

Atmosphere, conductive, 835-13020

Autoignition temperature

definition, 835-140

heating dip tank liquid, 835-12055

Automatic Fire Protection Systems, Requirements, Table 1, 835-12025



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B


Boiling point, heating dip tank liquid, 835-12055

Bonding

See electrical wiring and equipment

Bottom drains

construction, 835-12015

exemption for automatic closing covers, 835-12015

inspection, 835-11025

Burning, 835-11045


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C

Chromic acid, medical requirements, 835-11050

Cleaning

pipes, 835-12005

preparing for cleaning tanks, 835-11035

Combustible liquid, 835-13005

definition, 835-140

Combustible material

clearing, (see housekeeping)

debris, 835-12050

stock, 835-12050

Condenser, 835-13025

Conducting materials, 835-13010

Conductors, 835-13010

Confined spaces, reference, 835-11035

Construction

dip tanks, 835-12005

drain boards, 835-11005, 835-12005

piping connections, 835-12005

Contaminants

recirculated air, 835-11015, 835-11050

street clothes, 835-11050

Conveyors

hardening or tempering, 835-13005

paint detearing, 835-13010

Cooling system

hardening or tempering, 835-13005

Covers

exemption for bottom drains, 835-12015

fire protection system, 835-12025

inspection, 835-11025

Cyanide tanks, 835-11040

mixing cyanide with acid, 835-11040


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D

Deficiencies, 835-11025

Definitions

approved, 835-140

autoignition temperature, 835-140

combustible liquid, 835-140

detearing, 835-140

dip tank, 835-140

flammable liquid, 835-140

flashpoint, 835-140

lower flammable liquid, 835-140

NFPA, 835-140

vapor area, 835-140

Detearing

definition, 835-140

See also paint detearing

Dipping and coating operations, examples, 835-100

Dip tank, definition, 835-140

Draft diverter, 835-13025

Drain boards, construction, 835-13025, 835-11005, 835-12005

Drip plates, 835-13010

Drip screens, 835-13010

Drying operation, 835-13025, 835-12060

Duct work, inspection, 835-11025



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E

Electrically bonded, 835-13025, 835-12035

Electrical wiring and equipment, 835-13025, 835-12045

bonding and grounding

adding liquid, 835-13025, 835-12035

roll coating, 835-13020

electrostatic equipment, 835-13025, 835-12045, 835-13010

grounding connection, 835-11025, 835-13010

grounding, electrostatic equipment, 835-13010

hazardous (classified) locations, 835-12040

vapor area, 835-12040, 835-13025, 835-12045

wiring, 835-11025, 835-13025, 835-12035, 835-12040, 835-12045

Electricity

area, 835-13025, 835-12035

sparks, 835-13025, 835-12035

static, 835-13025, 835-12035

Electrodes, 835-13010

Electrostatic equipment

See also paint detearing

electrical requirements, 835-12040, 835-13010

grounding, 835-13010

vapor area, 835-13025, 835-12045, 835-13010

Emergency washing facilities, 835-11030

See also: First-aid, Chapter 296-800-15020, in the Safety and Health Core Rules book

Employee exposure, air contaminants, 835-11010

Employee protection

burning or open flames, 835-11045

liquids, burning, 835-11050

skin harm, 835-11050

welding, 835-11045

Entering a dip tank, 835-11035

See also:

Confined Spaces, Chapter 296-62-141 WAC

Safety Procedures, Chapter 296-24 WAC, Part A-4

Equipment

See electrical wiring and equipment

Exemptions

bottom drains, 835-12015

hardening and tempering, 835-12025

molten material, 835-100

Exhaust hood, 835-13025, 835-11020

Exhaust system

See ventilation

Explosion-proof wiring and equipment, 835-12040

adjacent areas, 835-12040

vapor area, 835-12040


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F

Fire extinguishing

inspection, 835-11025

manual fire extinguisher, 835-12025

system requirements, 835-12025

See also:

Fixed Extinguishing Systems, Dry Chemicals, Chapter 296-24-622 WAC, 835-12025

Fixed Extinguishing Systems, Gaseous Agents, Chapter 296-24-623 WAC

Fixed Extinguishing Systems, Water Spray and Foam, Chapter 296-24-627 WAC, 835-12025

Fire protection

automatic dip tank cover, 835-12025

automatic fire extinguishing system, 835-12025

drain boards, table 1, 835-12025

hardening or tempering, 835-12025, 835-13005

stock, 835-12025

system requirements, table 1, 835-12025

vapor area, 835-12020

First-aid, 835-11030

emergency washing facilities, 835-11030

material safety data sheet (MSDS), 835-11030

procedures, 835-11030

See also: First-aid, Chapter 296-800-15020, in the Safety and Health Core Rules book

Flammable liquid, definition, 835-140

Flammable or combustible liquids, 835-11010

constructing dip tanks, 835-12005

flashpoint, 835-120

recirculated air, 835-11015

storage, 835-120

Flashpoint

definition, 835-140

limitation for flammable or combustible liquid, 835-120

Flow coating, 835-13015

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G

Grids and connections, 835-13010

Grounding, 835-13010


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H

Hardening or tempering, 835-13005

alarm, 835-13005

conveyors, 835-13005

exemption, 835-12025

fire protection, 835-13005

flashpoint, 835-13005

tanks, construction requirements, 835-13005

Hazard assessment, 835-100, 835-11050

See also Personal Protective Equipment (PPE), Chapter 296-800-160 WAC

Hazardous chemical reaction, 835-11010

Hazardous classified locations

electrical wiring and equipment, 835-12040

vapor areas, 835-12040

See also Hazardous Locations, Chapter 296-24-95613 WAC

Hazardous gas, 835-11040

Health or safety hazard, 835-11015

Heat drying, 835-13025, 835-12060

mechanical ventilation, 835-13025, 835-12060

See also Standard for Ovens and Furnaces, NFPA 86-1999

Heated surfaces, vapor areas, 835-12040

Heating liquid, 835-12055

Helpful Tool

See Dip Tank PPE Selection Tool

High voltage leads, 835-13010

Hoods

inspection, 835-11025

outside air, 835-13025, 835-11020

Housekeeping

combustible debris, 835-12050

combustible stock, 835-12050

waste disposal, 835-12050

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I

Ignition, 835-13025, 835-12060

Ignition sources, 835-12040

adjacent areas, 835-12040

heat drying, 835-13025, 835-12060

vapor areas, 835-12040

Inspection

bottom drains, 835-11025

covers, 835-11025

dip tank equipment, 835-11025

electrical wiring equipment, 835-11025

fire extinguishing equipment, 835-11025

hoods, 835-11025

how often, 835-11025

mechanical, 835-11010, 835-13030

overflow pipes, 835-11025

ventilation, 835-11025



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L

LFL

See lower flammable limit (LFL)

Limit switch, 835-13005

Liquids

combustible, 835-11015

employee protection, 835-11050

flammable, 835-11015

heating, 835-12055

lockers, 835-11050

medical requirements, 835-11050

skin harm, 835-11050

storage, 835-11050

washing facilities, 835-11050

Local exhaust system, 835-11010

Lower flammable limit (LFL), 835-11010

airborne concentration, 835-11010

definition, 835-140

recirculated air, 835-11015

Lower flammable liquid, definition, 835-140


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M

Material safety data sheet(MSDS), first-aid, 835-11030

Mechanical ventilation

See ventilation

Medical requirements, chromic acid, 835-11050

Molten material, exemption, 835-100


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N

NFPA (National Fire Protection Association) Standards, references

Dipping and Coating Process using Flammable or Combustible Liquids, NFPA 34-1995 (22nd ed., 1995), 835-11010

Ovens and Furnaces, NFPA 86-1999, 835-13025, 835-12060

Non-combustible material, 835-12005, 835-13010


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O

Open flames

vapor areas, 835-12040

welding, 835-11045

Open-surface tanks, 835-11010

Overflow pipes

inspection, 835-11025

requirements, 835-12010


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P

Paint deposits, 835-13010, 835-13015

Paint detearing

See also electrostatic equipment

approved equipment, 835-13010

conveyors, 835-13010

fire protection, 835-13010

grounding, 835-13010

minimum safe distance, 835-13010

operations, 835-13010

posting signs, 835-13010

ventilation, 835-13010

Piping

cleaning, 835-12005

flow coating, 835-13015

inspection, 835-12005

Portable containers, adding liquid, 835-12035, 835-13025

PPE, Hazard assessment

Dip Tank PPE Selection Tool, HT1

reference, 835-100, 835-11050

Processes, specific, 835-130


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R

Recirculated air, 835-11015

alarm, 835-11015

approved equipment, 835-11015

contaminants, 835-11015

flammable or combustible liquids, 835-11015

lower flammable limit, 835-11015

Recordkeeping, inspections, 835-11025

Roll coating, 835-13020

flashpoint limitation, 835-13020

preventing static electricity, 835-13020


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S

Scope, 835-100

Smoking, vapor area, 835-12040

Solvents, chlorinated, 835-13025

Sparking distance, electrostatic equipment, 835-13010

Spray cleaning or degreasing

mechanical ventilation, 835-13030

spray painting, 835-13030

See also:

Spray Finishing Operations, Chapter 296-62-11019 WAC, 835-13010

Spray Finishing Using Flammable and Combustible Materials,Chapter 296-24-370 WAC, 835-13010

Sprinkler systems, automatic, 835-13010

Storage areas, separation from paint detearing operations, 835-13010

Storing liquids, 835-120

See also: Flammable and Combustible Liquids, Chapter 296-24-330 WAC


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T

Tank, cleaning or degreasing, 835-13025

Thermostat, vapor level, 835-13025

Transformers, 835-13010


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V

Valves, 835-11025

Vapor area, 835-140

definition, 835-140

fire protection, 835-12020

automatic systems, 835-12025

manual fire extinguisher, 835-12020

heated surfaces, 835-12040

ignition sources, 835-12040

open flames, 835-12040

smoking, 835-12040

spark producing devices, 835-12040

ventilation, 835-11010

Vapor concentration, 835-11015

Vapor degreasing

combustion air, 835-13025

exhaust flue, 835-13025

heating tank liquid, 835-13025

safeguards, 835-13025

solvent vapors, 835-13025

Vapors

solvent, 835-13025

spray cleaning and degreasing, 835-13025

Vent ducts, 835-13005

Ventilating fan, 835-13025, 835-12060, 835-13010

Ventilation, 835-11010

adequate, 835-13025, 835-12060, 835-12065

conveyors, 835-12065

electrical wiring, 835-11025

exhaust hood, 835-13025, 835-11020

general requirements, 835-11010

heat drying, 835-13025, 835-12060

inspection, 835-11025

recirculated air, 835-11015

systems, 835-11025, 835-12065

vapor area, 835-11010

See also:

Fundamentals Governing the Design and Operation of Local Exhaust Systems, ANSI A9.2-1979 Industrial Ventilation: A Manual of Recommended Practice, ACGIH Standard (22nd ed., 1995)

Practices for Ventilation and Operation of Open-Surface Tanks, ANSI Z9.1-1971

Standard for Dipping and Coating Process Using Flammable or Combustible Liquids, NFPA 34-1995 (22nd ed., 1995)

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W

Washing facilities, 835-11050

Welding requirements, 835-11045

See also:

Respiratory Protection, Chapter 296-62 WAC, Part E

Welding, Cutting and Brazing, Chapter 296-24, Part I

 


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