ISO 4783-1:1989

Overview

ISO 4783-1:1989 is the first part of an ISO guide for industrial wire screens and woven wire cloth. Part 1 - Generalities - tabulates a comprehensive range of aperture size and wire diameter combinations from which preferred groups may be chosen. For each combination the percentage open area is stated to aid assessment for screening and sieving applications. The standard also defines the required designation sequence for screens:
a) width of aperture (W), b) diameter of wire (d), c) material of wire, d) type of weave or type of crimp.

Key topics and requirements

• Tabulated combinations: Table 1 lists many aperture widths with associated wire diameters and the approximate open area (%) for each aperture/wire pairing.
• Open area calculation: The part specifies the parameters used to calculate percentage open area (W and d) and gives the formula contextually; this lets users verify tabulated values or compute custom combinations.
• Designation rules: Screens and woven cloth must be designated in the sequence W, d, material, and weave/crimp type to ensure clear product identification.
• Supplementary data: Selections from the tabulated combinations may be augmented by supplier information such as mass per unit area or mesh count per unit length to support procurement and quality control.
• Normative references: The document refers to related ISO documents for preferred numbers, aperture nominal sizes, and wire specifications (see Related Standards).

Applications and users

ISO 4783-1 is practical for anyone specifying, producing, testing or buying industrial screening media. Typical users and applications include:

• Manufacturers of wire screens and woven wire cloth selecting aperture/ wire configurations for strength and flow performance.
• Process and mechanical engineers designing sieves, screens, and separation equipment.
• Procurement and quality teams requiring standardized product designation and documented open-area data.
• Industries relying on size separation: mining & aggregates, filtration, food processing, pharmaceuticals, chemicals and wastewater treatment (where accurate aperture and open area affect throughput and separation efficiency).

Using ISO 4783-1 helps ensure consistent component selection, clear product labelling, and comparable performance data across suppliers.

Related Standards

• ISO 4783-2 - Preferred combinations for woven wire cloth
• ISO 4783-3 - Preferred combinations for pre-crimped or pressure‑welded wire screens
• Normative references cited in ISO 4783-1 include ISO standards on preferred numbers, aperture nominal sizes and wire specifications (see the standard for the full list).

Keywords: ISO 4783-1, industrial wire screens, woven wire cloth, aperture size, wire diameter combinations, percentage open area, screen designation, sieving, mesh count.