EN 1094-2:1998 PDF

Overview

EN 1094-2:1998 (CEN) - Insulating refractory products - Part 2: Classification of shaped products - is a European standard derived from ISO 2245:1990 (modified). It defines a classification system for shaped insulating refractory products based primarily on the determination of permanent change in dimension on heating, with a secondary classification by bulk density to identify lightweight products (designated Class L). The standard explicitly excludes products composed of ceramic fibres.

Key topics and requirements

• Classification criteria: Primary classification is determined by measuring the permanent dimensional change after heating, providing a measure of thermal stability for shaped insulating refractories.
• Secondary classification (bulk density): Products with low bulk density are identified as lightweight (Class L), addressing thermal insulation performance and handling characteristics.
• Scope limitation: Ceramic fibre–based insulating products are excluded from this part of the standard.
• Standard lineage: EN 1094-2 implements a modified form of ISO 2245:1990, aligning European classification practice with international methodology.
• Intended outputs: A consistent set of product classes that manufacturers, testers, and specifiers can reference for selection, specification, and quality control of shaped insulating refractories.

Applications and who uses it

EN 1094-2 is practical for professionals involved with high-temperature insulation and refractory selection:

• Manufacturers of shaped insulating refractories (bricks, blocks, preformed shapes) for classifying product lines and communicating performance.
• Materials engineers and designers specifying insulating refractories for furnaces, kilns, incinerators and other high-temperature industrial equipment.
• Procurement and QA teams using standardized classes to set acceptance criteria and perform incoming inspections.
• Testing laboratories that determine permanent dimensional change and measure bulk density for compliance and certification.
• Standards committees and regulatory bodies referencing harmonized classification methods for safety and performance documentation.

Practical benefits include clearer product selection, improved interoperability between suppliers and end-users, consistent quality control, and better matching of insulating refractory performance to thermal and structural requirements.

Related standards

• EN 1094-2 is based on ISO 2245:1990 (modified).
• Users should consult complementary standards and test-method documents for detailed measurement procedures (e.g., standards on refractory test methods, bulk density measurement, and thermal stability testing) when implementing EN 1094-2 classifications.