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WAC 296-307-45525

Provide additional fire protection for large dip tanks.

You must:
• Provide at least one automatic fire extinguishing system or an automatic dip tank cover if the tank:
– Holds one hundred fifty gallons or more of liquid
or
– Has four square feet or more of liquid surface area.
• Make sure automatic fire extinguishing systems or automatic dip tank covers meet the requirements of Table 1.
Exemption:
An automatic fire extinguishing system or an automatic dip tank cover is not required for a hardening or tempering tank that:
 
• Holds less than five hundred gallons
 
or
 
• Has less than twenty-five square feet of liquid surface area.
Table 1: Automatic Fire Protection System Requirements
If you provide:
Then you must:
An automatic fire extinguishing system
• Use extinguishing materials suitable for a fire fueled by the liquid in the tank
 
• Make sure the system protects the:
 
 
– Tanks
 
 
– Drain boards
 
 
– Stock over drain boards.
A dip tank cover
• Make sure the cover is:
 
 
– Closed by approved automatic devices in the event of fire
 
 
– Able to be manually activated
 
 
– Kept closed when the tank is not being used
 
 
– Made of noncombustible material or metal-clad material with locked metal joints.
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 03-10-068, § 296-307-45525, filed 5/6/03, effective 8/1/03.]
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