Similar International Standards
EN 13163:2012+A2:2016CEN (European Committee for Standardization), Europe
HighCurrent
Thermal insulation products for buildings - Factory made expanded polystyrene (EPS) products - Specification
Both standards specify requirements for factory-made EPS boards used for thermal insulation in buildings.
ASTM C578-21ASTM International, USA
HighCurrent
Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation
Covers rigid cellular polystyrene, including EPS, for thermal insulation in various construction applications.
BS EN 13163:2012+A2:2016BSI (British Standards Institution), UK
HighCurrent
Thermal insulation products for buildings. Factory made expanded polystyrene (EPS) products. Specification
Identical scope to EN 13163, specifying requirements for factory-made EPS boards in the UK market.
ISO 4898:2018ISO (International Organization for Standardization), International
MediumCurrent
Rigid cellular plastics — Thermal insulation products for buildings — Specifications
Provides a framework for specifying rigid cellular plastics, with EPS being one type covered, but is less detailed than national/regional standards.
Key Differences
≠Classification System: IS 9091 classifies products into four grades (SE, N, H, VH) based primarily on nominal density. In contrast, EN 13163 uses a performance-based designation code system (e.g., CS(10)100 for 100 kPa compressive strength), and ASTM C578 uses Types (e.g., Type I, II, IX) linked to minimum compressive strength and density.
≠Fire Performance Classification: IS 9091 mandates a simple 'Self-Extinguishing' property test as per IS 6746. EN 13163 uses the comprehensive European Reaction to Fire classification system (Euroclasses A1 to F), which evaluates multiple factors like flame spread, smoke production, and flaming droplets.
≠Thermal Conductivity Declaration: IS 9091 specifies fixed maximum thermal conductivity values for each density grade. EN 13163 requires manufacturers to declare a design lambda value (λD) based on a statistical '90/90' principle (90% fractile with 90% confidence), which provides a more product-specific and reliable thermal performance figure.
≠Regulatory Framework: EN 13163 is a harmonized standard under the EU Construction Products Regulation (CPR), requiring a Declaration of Performance (DoP) and CE marking. IS 9091 is a national standard governed by the Bureau of Indian Standards (BIS) certification scheme, requiring the ISI mark.
Key Similarities
≈Core Material and Application: All standards cover the same fundamental material (rigid expanded polystyrene) and are intended for the primary application of thermal insulation in building construction (roofs, walls, floors).
≈Fundamental Properties Specified: All standards define requirements for a core set of properties critical for performance, including density, compressive strength, bending strength (flexural strength), thermal conductivity, dimensional stability, and water absorption.
≈Dimensional Tolerances: All standards specify acceptable tolerance limits for the physical dimensions of the boards, such as length, width, thickness, squareness, and flatness, to ensure product quality and proper installation.
≈Test Methods: Many of the underlying test methods for determining properties like compressive strength (ISO 844), thermal conductivity (ISO 8301/8302), and dimensional stability are based on the same or very similar ISO standards, ensuring a degree of consistency in measurement.