Overview
ISO 565:1990 is an internationally recognized standard developed by the International Organization for Standardization (ISO) specifying the nominal sizes of openings for test sieves fabricated from metal wire cloth, perforated metal plate, and electroformed sheet. The standard defines principal and supplementary nominal sizes, ensuring consistency in the measurement and classification of particle sizes during testing and analysis processes across various industries.
The scope of ISO 565:1990 covers:
- Metal wire cloth with square openings
- Perforated plate and electroformed sheet with either square or circular openings
According to ISO 565, sizes of sieve openings of 1 mm and above are measured in millimetres (mm), while sizes below 1 mm are measured in micrometres (μm). This facilitates precise identification and communication regarding sieve specifications.
Key Topics
- Nominal Sieve Opening Sizes: The standard establishes tables listing both principal and supplementary sizes for sieve openings, providing a comprehensive reference for manufacturers and laboratories.
- Types of Sieving Media: ISO 565 applies to test sieves produced from:
- Metal wire cloth (square openings)
- Perforated metal plates (square or circular openings)
- Electroformed sheets (square or circular openings)
- Size Ranges:
- Metal wire cloth: 125 mm down to 20 μm
- Perforated plates: 125 mm down to 4 mm (square), or to 1 mm (circular)
- Electroformed sheets: 500 μm down to 5 μm
- Designation and Expression: Sizes of openings are to be clearly stated, with indication of type (square or circular) where applicable.
Applications
ISO 565:1990 is crucial for industries and laboratories requiring precise and repeatable particle size analysis, including:
- Quality Control: Ensuring consistency in product quality by standardizing sieve sizes used in testing.
- Manufacturing: Specification and procurement of sieves for materials processing, including in food, pharmaceuticals, chemicals, aggregates, and mining.
- Research and Development: Standardized test sieves are vital in laboratory analysis of powders, granules, and other particulate materials.
- Regulatory Compliance: Meeting national and international requirements for sieve specifications across industries.
By adhering to ISO 565, organizations benefit from:
- Compatibility between sieves from different manufacturers
- Reduced ambiguity in technical communications
- Traceability and quality assurance in material testing procedures
Related Standards
ISO 565:1990 is part of a suite of international standards on test sieving and sizing methods. Key related standards include:
- ISO 3310-1: Test sieves - Technical requirements and testing for metal wire cloth
- ISO 3310-2: Test sieves - Technical requirements and testing for perforated metal plate
- ISO 3310-3: Test sieves - Technical requirements and testing for electroformed sheets
- ISO 2395: Terminology for test sieves and sieving
- ISO 3 and ISO 497: Preferred number series for reference values
Together, these standards support accurate particle size analysis and ensure a harmonized global approach to sieve manufacturing, selection, and use.
Keywords: ISO 565, test sieves, nominal sizes of openings, metal wire cloth, perforated metal plate, electroformed sheet, particle size analysis, sieve standards, quality control, laboratory sieves, international standardization.
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