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IS 460:2000 (Part 3) is the Indian Standard (BIS) for test sieves: part-iii methods of examination of apertures of test sieves. IS 460 Part 3 specifies the methodologies and instruments required for examining and calibrating the apertures of test sieves to ensure they meet the dimensional tolerances specified in Parts 1 and 2. It is predominantly used by calibration laboratories to certify material testing sieves used in civil, mechanical, and chemical engineering.
Test Sieves: Part-III Methods of Examination of Apertures of Test Sieves
Overview
Status
Current
Usage level
Specialized
Domain
Materials Science — Sieves, Sieving and Other Sizing Methods
! Sieves must be meticulously cleaned (preferably using an ultrasonic cleaner for fine meshes) before examination to prevent dust particles from skewing aperture measurements.
! For wire cloth sieves, measurements must always be taken in both the warp and weft directions.
! Do not use physical probes or stiff gauges on fine wire meshes as they can permanently distort the apertures.
Test sieves. Technical requirements and testing. Test sieves of metal wire cloth
Provided technical requirements for wire cloth test sieves, closely aligned with IS 460:2000.
DIN ISO 3310-1:2017DIN (German Institute for Standardization, Germany)
HighCurrent
Test sieves - Technical requirements and testing - Part 1: Test sieves of metal wire cloth
German national adoption of the ISO 3310-1 standard for wire cloth test sieves.
Key Differences
≠IS 460:2000 is based on older international standards, while current versions like ISO 3310-1:2016 and ASTM E11-20 have been updated with tighter tolerances and refined verification methods.
≠ASTM E11 specifies three distinct conformity levels (Compliance, Inspection, Calibration) with progressively stricter tolerances and documentation, a system not explicitly detailed in IS 460.
≠The range of supplementary sieve aperture sizes available in ISO and ASTM standards is often more extensive than the primary series listed in IS 460, offering finer gradations for specialized analyses.
≠Permissible aperture tolerances in the current ISO 3310-1:2016 are generally stricter than those specified in the older IS 460:2000 for equivalent sieve sizes.
Key Similarities
≈All standards are fundamentally based on a primary sieve series with aperture sizes derived from the 'R' series of preferred numbers, with a base of 1 mm.
≈The general construction requirements, including the use of rigid, circular frames and the secure mounting of the wire cloth, are conceptually identical across all standards.
≈All standards mandate that sieves must be clearly and permanently marked with essential information, including nominal aperture size, the standard it complies with, and the manufacturer's identification.
≈The core principle of defining tolerances for both the nominal aperture size and the wire diameter is a shared feature, ensuring the quality and consistency of the sieving medium.
Parameter Comparison
Parameter
IS Value
International
Source
Primary Sieve Series Basis
R 20 series based on 1 mm (e.g., 850 µm, 1.00 mm, 1.18 mm)
R 40/3 series based on 1 mm (allows for more intermediate sizes)
ISO 3310-1
Aperture Tolerance (1.00 mm Sieve)
Max variation for an individual aperture: ±0.054 mm
Max variation for an individual aperture: ±0.045 mm
ISO 3310-1:2016
Aperture Tolerance (125 µm Sieve)
Max variation for an individual aperture: ±12 µm
Max variation for an individual aperture: ±9 µm
ISO 3310-1:2016
Wire Diameter (for 1.00 mm Sieve)
0.63 mm nominal
0.63 mm nominal
ISO 3310-1:2016
Standard Frame Diameters
100, 200, 300, 450 mm
Common sizes include 200 mm, 203 mm (8 in), 300 mm, 305 mm (12 in)
ISO 3310-1 / ASTM E11
Conformity Levels
Specifies a single grade of test sieve.
Defines 'Compliance', 'Inspection', and 'Calibration' sieves with different tolerance levels.
ASTM E11 - 20
Labelling Requirements
Requires nominal size, standard mark, and maker's name.
Requires nominal size, standard, unique serial number, frame/cloth material, and maker's name.
ASTM E11 - 20
⚠ Verify details from original standards before use
Key Values4
Quick Reference Values
magnification for fine sieves50x to 100x (for optical projection)
measurement resolution fine sieves0.001 mm (1 micrometer)
measurement resolution coarse sieves0.01 mm
apertures measured per field10 to 20 consecutive apertures in both warp and weft directions
Tables & Referenced Sections
Key Tables
No tables data
Key Clauses
Clause 3 - Examination of Wire Cloth Test Sieves
Clause 4 - Examination of Perforated Plate Test Sieves
What equipment is needed to examine fine wire cloth sieves?+
An optical profile projector or a measuring microscope with a magnification of 50x to 100x is recommended to avoid physical contact.
Do I need to measure every single aperture on the sieve?+
No, the standard dictates measuring a continuous sequence of apertures (usually 10 to 20) across different selected fields of the mesh to determine the average aperture size.
How are coarse perforated plate sieves measured?+
They can be measured directly using calibrated mechanical instruments like vernier calipers, inside micrometers, or specialized taper gauges.