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PDFWAC 296-307-455

Additional requirements for dip tanks using flammable or combustible liquids.

Summary.
important:
This section applies to:
• Flammable and combustible liquids (flashpoint below 200°F)
• Liquids that have a flashpoint of 200°F (93.3°C) or higher if you:
– Heat the liquid
– Dip a heated object in the tank
Your responsibility:
Safeguard employees working with dip tanks containing flammable or combustible liquids
You must:
construction
Include additional safeguards when constructing dip tanks
Provide overflow pipes
Provide bottom drains
fire protection
Provide fire protection in the vapor area
Provide additional fire protection for large dip tanks
electrical wiring and equipment and sources of ignition
Prevent 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 your 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 03-10-068, § 296-307-455, filed 5/6/03, effective 8/1/03.]
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