Engineering:Fire proximity suit

Short description: Suit designed to protect from high temperatures

Firefighters training at a U.S. Air Force base in fire proximity suits

Detail of fire proximity suit

A fire proximity suit (also, silvers, silver bunker suit, or asbestos suit) is a suit designed to protect a firefighter or volcanologist from extremely high temperatures. They were first designed and used in the 1930s. Originally made of asbestos fabric, current models use vacuum-deposited aluminized materials.

History

Fire proximity suits first appeared during the 1930s, and were originally made of asbestos fabric. Today they are manufactured from vacuum-deposited aluminized materials that reflect the high radiant loads produced by the fire.

An early manufacturer of the aluminized suits was the Bristol Uniforms company under of Patrick Seager Hill.

Types

There are three basic types of these aluminized suits:

• Approach suit—used for work in the general area of high temperatures such as steel mills and smelting facilities. These usually provide ambient heat protection up to ≈200 °F (93 °C).
• Proximity suit—used for instance in aircraft rescue and fire fighting (ARFF), providing ambient heat protection up to ≈500 °F (260 °C).
• Entry suit—used for entry into extreme heat, such as kiln work requiring entry into the heated kiln, and situations requiring protection from total flame engulfment. Most commonly made of Zetex or vermiculite and not aluminized. These provide ambient protection up to ≈2,000 °F (1,093 °C) for short duration, and prolonged radiant heat protection up to ≈1,500 °F (816 °C).

Complete proximity protection for ARFF requires:

• Aluminized hood or helmet cover with neck shroud,
• Aluminized jacket and pants complete with vapor barrier insulated liner,
• Aluminized lined gloves,
• Aluminized ARFF boots,
• Self-contained breathing apparatus (SCBA) (aluminized covers for air bottles, or suits that cover the air pack are also available).

See also

• Physics:Hazmat suit – Protective suit against chemical, bacteriological, and nuclear risks

External links

• "Fire Rescue", Flight, 20 November 1941, http://www.flightglobal.com/pdfarchive/view/1941/1941%20-%202756.html  – contemporary article on asbestos suits