Link points to Internet Archive / others. Not hosted by InfraLens. Details
IS 3478:1966 is the Indian Standard (BIS) for high-density wood particle boards. This standard lays down the specifications for high-density wood particle boards, encompassing requirements for materials, manufacturing, dimensions, and physical properties. It serves as a quality benchmark for boards used in applications demanding high strength and density, such as specialized flooring, die-making, and industrial uses.
Specification for High-Density Wood Particle Boards
Overview
Status
Current
Usage level
Specialized
Domain
Materials Science — Wood and Other Lignocellulosic Products
ANSI A208.1-2016ANSI - American National Standards Institute (USA)
HighCurrent
American National Standard for Particleboard
Specifies a 'High Density' (HD) grade for particleboard with a density exceeding 800 kg/m³, matching the IS scope.
BS EN 312:2010BSI - British Standards Institution (UK) / CEN - European Committee for Standardization
MediumCurrent
Particleboards. Specifications
Specifies requirements for board types by application (e.g., P6 - Heavy-duty load-bearing) which often have high density, though not strictly classified by it.
JIS A 5908:2023JSA - Japanese Standards Association (Japan)
MediumCurrent
Particleboards
Classifies boards by mechanical performance and includes density designations (H, M, L), where 'H' aligns with the high-density concept.
Key Differences
≠IS 3478:1966 provides no requirements for formaldehyde emissions, a critical health parameter that is strictly regulated in all modern international standards (e.g., E1/E2 classes in EN 312, CARB P2/TSCA Title VI in ANSI A208.1).
≠The Indian standard uses a singular classification based on density (>800 kg/m³). In contrast, EN 312 classifies boards by performance in specific applications (P1-P7), and ANSI A208.1 uses a matrix of grades (M-S, M-1, M-2, etc.) and density types (LD, MD, HD).
≠IS 3478 is a very old standard (1966) and its referenced test methods are outdated compared to the harmonized ISO and EN test methods used globally for properties like bending strength (EN 310) and internal bond (EN 319).
≠Modern standards like EN 312 specify distinct board types for different environments, such as moisture-resistant boards (P3, P5, P7). IS 3478 defines a single generic high-density board without distinguishing performance in humid conditions.
Key Similarities
≈Both IS 3478 and its international counterparts specify core mechanical properties essential for structural and non-structural use, including Modulus of Rupture (bending strength) and Internal Bond (tensile strength perpendicular to the surface).
≈All standards define mandatory dimensional tolerances for thickness, length, width, and squareness to ensure product consistency and fit-for-purpose manufacturing.
≈The fundamental definition of the product—wood particles bonded with a synthetic resin adhesive under heat and pressure—is consistent across all standards.
≈Physical properties related to moisture, such as water absorption and thickness swelling after immersion in water, are specified in both the IS code and international standards as key performance indicators.
Parameter Comparison
Parameter
IS Value
International
Source
Density Classification
Minimum 800 kg/m³
Over 800 kg/m³ (> 50 lb/ft³) for 'HD' grade
ANSI A208.1-2016
Modulus of Rupture (MOR)
≥ 27.5 MPa (for flat-pressed boards)
≥ 20 MPa (for P6 type, 13-20mm thickness)
BS EN 312:2010
Internal Bond (Tensile Strength Perp. to Surface)
≥ 0.78 MPa
≥ 1.03 MPa (for HD grade)
ANSI A208.1-2016
Thickness Swelling (24h water immersion)
Maximum 8%
Maximum 12% (for P6 type)
BS EN 312:2010
Water Absorption (24h water immersion)
Maximum 10% by weight
Not specified as a mandatory limit; focus is on thickness swell.
BS EN 312:2010
Screw Withdrawal Resistance (Face)
≥ 1765 N (180 kgf)
≥ 1330 N (300 lbf) for HD grade
ANSI A208.1-2016
Formaldehyde Emission
Not specified
Must meet Class E1 or E2 requirements (e.g., E1: <0.1 ppm by chamber method EN 717-1)
BS EN 312:2010
⚠ Verify details from original standards before use
Key Values3
Quick Reference Values
minimum density> 800 kg/m³
moisture content range5 to 15 %
water absorption limitDependent on board thickness, typically < 10% for 24 hours