Overview
ISO 10080:1990 specifies a classification system for dense, shaped acid-resisting refractory products (e.g., refractory bricks) that meet the general classification criteria for dense shaped refractories. The standard groups products by measured acid resistance (mass loss in acid exposure) and further subdivides them by apparent porosity, providing a simple, standardized designation to aid specification, testing and procurement.
Key topics and requirements
- Classification by acid resistance: Products are assigned to one of three groups based on loss of mass after an acid-resistance test:
- Group 1: mass loss ≤ 2%
- Group 2: mass loss > 2% and ≤ 4%
- Group 3: mass loss > 4% and ≤ 7%
- Acid-resistance testing is performed according to the referenced test methods (see Related Standards).
- Subdivision by apparent porosity: Each group is split into two sub-groups based on apparent porosity measured per ISO 5017:
- Sub‑group A: apparent porosity ≤ 15%
- Sub‑group B: apparent porosity > 15%
- Product designation: The classification number plus sub‑group letter (for example, 1A) is used to identify a product’s acid-resistance group and porosity class.
- Normative references: ISO 10080 relies on established test and classification standards for execution and consistency (see Related Standards).
Practical applications
- Standardizes selection and specification of acid-resisting refractory bricks and shaped products used where chemical attack by acids (notably sulfuric acid) is a concern.
- Supports material selection for linings, blocks and shapes in industries such as chemical processing, acid production, flue gas cleaning, and any environment where refractory components are exposed to acidic media.
- Facilitates quality control and acceptance criteria in manufacturing and procurement by providing measurable classification thresholds.
Who uses this standard
- Refractory manufacturers and product designers for product classification and labeling.
- Materials and corrosion engineers specifying refractory linings for acidic environments.
- Laboratory and testing personnel conducting acid-resistance and porosity measurements.
- Procurement and quality assurance teams defining acceptance criteria for shaped refractory products.
Related standards
- ISO 1109 - Classification criteria for dense shaped refractory products (referenced for general classification).
- ISO 8890 - Determination of resistance to sulfuric acid (acid-resistance test procedures).
- ISO 5017 - Determination of bulk density, apparent porosity and true porosity (porosity measurement).
Keywords: ISO 10080, acid-resisting refractory, dense shaped refractory products, apparent porosity, sulfuric acid resistance, refractory bricks, ISO 1109, ISO 8890, ISO 5017.
