Molten metal splashes
Molten metal splashes are a critical foundry hazard. Smelting, pouring, and casting involve liquid metals at extreme temperatures, and even a small splash can cause severe burns or ignite ordinary clothing.
Protective fabrics must be engineered to shed molten metal rather than allow it to adhere. High thermal insulation is also essential to reduce heat transfer to the skin and limit the severity of injuries.
Radiant heat
Radiant heat is a significant hazard around furnaces and molten materials. It transfers energy as infrared radiation and can quickly cause burns through exposed skin or clothing.
Protective fabrics are designed to reflect or absorb heat energy and reduce thermal transfer. Aluminized materials are particularly effective because their reflective surface deflects a substantial portion of the radiant energy.
Welding
Welding environments expose workers to sparks, molten-metal spatter, slag, and intense UV and infrared radiant heat. These hazards can ignite ordinary workwear and cause severe burns during even short operations.
Protective clothing must be flame-resistant, repel fast molten-metal splashes, minimize heat transfer, and maintain its performance after repeated use while providing full coverage in high-exposure areas.
Arc flash
An arc flash releases intense thermal energy when electrical current passes through air. An arc event may also produce pressure, sound and projectiles, which must be considered separately from the thermal performance of clothing.
Arc ratings are laboratory results for a material or tested material assembly, expressed in cal/cm². They support PPE selection for the assessed task exposure; they do not guarantee freedom from burns or establish protection against electric shock or pressure waves.