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. |