PDFWAC 296-307-455

Additional requirements for dip tanks using flammable or combustible liquids.

Summary.
IMPORTANT:
This section applies to:
1. Flammable and combustible liquids (flashpoint below 200°F).
2. Liquids that have a flashpoint of 200°F (93.3°C) or higher if:
a. Heat the liquid;
b. Dip a heated object in the tank.
Employer responsibility:
Safeguard employees working with dip tanks containing flammable or combustible liquids.
The employer must meet the requirements…
in this section:
CONSTRUCTION
 
Additional safeguards when constructing dip tanks.
Provide overflow pipes.
Provide bottom drains.
FIRE PROTECTION
 
Fire protection in the vapor area.
Additional fire protection for large dip tanks.
ELECTRICAL WIRING AND EQUIPMENT AND SOURCES OF IGNITION
 
Prevention of static electricity sparks or arcs when adding liquids to a dip tank.
Control ignition sources.
Provide safe wiring and electrical equipment where the liquid can drip or splash.
HOUSEKEEPING
 
Keep the area around dip tanks clear of combustible material and properly dispose of waste.
HEATING LIQUID
 
Make sure heating the liquid in dip tanks does not cause a fire.
HEAT DRYING
 
Make sure a heating system used for drying objects does not cause a fire.
CONVEYORS
 
Make sure the conveyor system for dip tanks is safe.
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 20-21-091, § 296-307-455, filed 10/20/20, effective 11/20/20; WSR 03-10-068, § 296-307-455, filed 5/6/03, effective 8/1/03.]