Overview
EN ISO 9185:2025 - Protective clothing: Assessment of resistance of materials to molten metal splash specifies a laboratory method to evaluate the heat-penetration resistance of materials used in protective garments against large splashes of molten metal. The standard provides specific test procedures for molten aluminium, molten cryolite, molten copper, molten iron and molten mild steel, and its principle is extensible to other molten materials with appropriate safety controls.
Key topics and technical requirements
- Test principle: Controlled pours of molten metal onto a specimen fixed on a pin frame; damage is assessed using an embossed PVC sensor film placed directly behind the specimen. The minimum mass of metal that causes damage defines the molten metal splash index.
- Specified materials: Procedures for molten aluminium, cryolite, copper, iron and mild steel; Annex B gives test conditions for these and guidance for other materials.
- Apparatus & conditioning: Requirements include a crucible and detachable holder, furnace capable of at least 100 °C above pouring temperature, temperature probes (thermocouple/optical) up to 1 650 °C, a rotating pouring device and sand tray, plus a metal support under the specimen for improved reproducibility.
- PVC sensor film calibration: Routine verification of the PVC sensor film (mass per unit area and thermal response) per Annex C - calibration is done within 30 days of testing to account for plasticizer loss and batch variability.
- Procedures & decision rules: Iterative and performance level–based testing procedures are defined (including void tests and reporting requirements). Annex A specifies objective criteria for assessing “damage” to the sensor film.
- Operator safety: The standard emphasizes protective measures and apparatus design to protect test operators handling high-temperature molten materials.
Applications and users
EN ISO 9185:2025 is intended for:
- PPE manufacturers designing and certifying garments (protective clothing, aprons, sleeves) for molten-metal environments.
- Independent test laboratories performing molten metal splash testing and performance classification.
- Safety engineers and compliance officers in foundries, steel and aluminium plants, metal‑casting, and smelting operations evaluating material selection and PPE performance.
- Regulators and procurement teams specifying protective clothing requirements for high‑temperature processes.
Practical benefits include standardized assessment of material resistance to molten metal splash, improved reproducibility using calibrated PVC sensor film and metal support, and clearer guidance for matching protective clothing to workplace hazards (foundry safety, welding, metal casting).
Related standards
- ISO 683-1 (referenced normative material standard)
- ISO 11610 (source for molten metal splash index definition)
- Relevant PPE and garment performance standards used in purchasing and certification of protective clothing
Keywords: EN ISO 9185:2025, molten metal splash testing, protective clothing, PVC sensor film, heat penetration resistance, PPE testing, foundry safety.