SIST EN 12906:2013

Overview

SIST EN 12906:2013 is a European Standard developed by CEN that specifies requirements for pumice used in the treatment of water intended for human consumption. This standard defines the characteristics of pumice-including physical and chemical properties-and outlines test methods to ensure quality and safety. It provides key guidance on the use, labelling, transportation, and storage of pumice, ensuring compliance with relevant drinking water regulations within Europe.

Key Topics

• Scope and Application: SIST EN 12906:2013 applies exclusively to pumice employed as a filtration media or support material in water treatment systems producing drinking water.
• Physical Properties: Pumice is described as a white to grey granular material with a porous structure and smooth texture. The particle size distribution, bulk density (loose and packed), and porosity ranges are standardized for consistent filtration performance.
• Chemical Characteristics: The standard sets purity requirements, limiting acid-soluble material to less than 5%, and addresses common impurities. Use of pumice should not adversely affect water quality after filtration.
• Test Methods: Sampling and testing must follow referenced methods from EN 12902, including procedures for particle size determination, bulk density measurement, and chemical analysis.
• Labelling and Handling: Pumice is not classified as dangerous cargo; labelling requirements include product name, particle size, net mass/volume, supplier information, and a conformity statement. Proper storage ensures the product's chemical and physical stability over extended periods.
• Safety and Emergency Guidance: Pumice is non-hazardous, but dust control measures are advised during handling. First aid and spillage procedures are specified to ensure safe use.

Applications

• Water Treatment Filters: Pumice is widely used as a filtration media in single or multimedia filters to remove suspended matter from water intended for human consumption.
• Support Layer in Filtration Systems: It serves as a support layer within multi-layer filter beds, helping maintain filtration efficiency and media stability.
• Open and Closed Systems: The standard confirms pumice’s suitability for various filter designs including open or closed systems, adapting to different hydraulic and operational requirements.
• Drinking Water Production: By meeting SIST EN 12906:2013 specifications, pumice ensures that water treated using this medium complies with drinking water quality standards such as Council Directive 98/83/EC.

Related Standards

• EN 12901:1999 – Definitions for inorganic supporting and filtering materials used in water treatment, providing terminology harmonization relevant to pumice.
• EN 12902 – Specifies methods of test applied to inorganic supporting and filtering materials, referenced extensively for sampling and test procedures in SIST EN 12906:2013.
• Council Directive 98/83/EC – Sets the quality standards for water intended for human consumption across Europe, establishing regulatory context for the use of pumice in drinking water treatment.
• Regulation (EC) No 1272/2008 (CLP Regulation) – Provides classification, labelling, and packaging rules for substances; relevant for understanding pumice’s regulatory status and labelling requirements.

This standard is essential for water treatment professionals, manufacturers, and regulatory bodies aiming to ensure that pumice media used in potable water treatment are safe, effective, and compliant with European regulations. Adherence to SIST EN 12906:2013 supports reliable filtration performance, water quality protection, and consumer safety.