Steam and Hot Liquid Burn Protection
topic
Steam penetration resistance testing per ISO 9151 measures heat transmission through fabric specimens exposed to steam at atmospheric pressure using a copper calorimeter, with steam posing a severe burn hazard through latent heat release of 2260 joules per gram on condensation that delivers heat flux far exceeding dry convective exposure at equivalent temperature, requiring the moisture barrier layer of firefighter clothing composites to provide resistance to steam heat transmission as verified by the ISO 9151 test method.
Role
Verifies that the moisture barrier layer provides the steam protection that complements outer shell thermal resistance in the complete composite system, with steam burn hazard being particularly severe in structural firefighting where water application to superheated surfaces generates steam atmospheres and where moisture-permeable outer shells without adequate moisture barriers would allow steam penetration to deliver concentrated burn injury.