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2405.9 Hardening and tempering tanks

Los Angeles Fire Code > 24 Flammable Finishes > 2405 Dipping Operations > 2405.9 Hardening and tempering tanks
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Hardening and tempering tanks shall comply with Sections 2405.3 through 2405.3.3, 2405.4.2 and 2405.8, but shall be exempt from other provisions of Section 2405.

2405.9.1 Location

Tanks shall be located as far as practical from furnaces and shall not be located on or near combustible floors.

2405.9.2 Hoods

Tanks shall be provided with a noncombustible hood and vent or other approved venting means, terminating outside of the structure to serve as a vent in case of a fire. Such vent ducts shall be treated as flues and proper clearances shall be maintained from combustible materials.

2405.9.3 Alarms

Tanks shall be equipped with a high-temperature limit switch arranged to sound an alarm when the temperature of the quenching medium reaches 50°F (10°C) below the flash point.

2405.9.4 Fire protection

Hardening and tempering tanks greater than 500 gallons (1893 L) in capacity or 25 square feet (2.3 m2) in liquid surface area shall be protected by an approved automatic fire-extinguishing system complying with Chapter 9.

2405.9.5 Use of air pressure

Air under pressure shall not be used to fill or agitate oil in tanks.
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