ISO 7805-1-1984 PDF

Full title and description

St ISO 7805-1-1984 — Industrial plate screens — Part 1: Thickness of 3 mm and above. Defines patterns, hole sizes and pitch ratios for perforated low‑carbon steel plates used as industrial screening media (plates 3 mm thick and greater), specifying round and square perforation patterns and nominal open areas for typical screening applications.

Abstract

This international standard specifies three perforation patterns (round and square holes) for industrial plate screens made from low‑carbon steel with thicknesses of 3 mm and above. It gives permitted hole size ranges (from about 3.15 mm up to 125 mm), five pitch‑to‑hole ratios and the resulting nominal open areas (approximately 64 % down to 23 %), to standardize designation, selection and interchangeability of perforated screening plates.

General information

• Status: Published; confirmed by ISO review (standard confirmed 25 November 2022).
• Publication date: April 1984 (first edition; published 1 April 1984).
• Publisher: ISO — International Organization for Standardization.
• ICS / categories: 73.120 — Equipment for processing of minerals (industrial screening equipment and plate screens).
• Edition / version: ISO 7805-1:1984, Edition 1.
• Number of pages: 5.

Scope

Applies to perforated low‑carbon steel plates of nominal thickness 3 mm and above used as industrial screens. The standard describes three standard perforation patterns using round (circular) and square holes, specifies hole‑size ranges (approximately 3.15 mm to 125 mm), prescribes five pitch‑to‑hole ratios, and gives the corresponding nominal open‑area percentages. It is intended to allow consistent specification and interchangeability of screening plates for mineral processing and similar industrial applications.

Key topics and requirements

• Standardized perforation patterns: three patterns for round and square holes suited to screening applications.
• Hole size ranges: nominal hole sizes from about 3.15 mm up to 125 mm covered for plates ≥ 3 mm thick.
• Pitch‑to‑hole ratios: five prescribed ratios that determine bar width and open area.
• Nominal open area: specified ranges of open area produced by the pitch/hole combinations (roughly 64 % down to 23 %).
• Material and thickness scope: low‑carbon steel plates with thickness ≥ 3 mm.
• Designation and interchangeability: rules for identifying perforation patterns and sizes to aid procurement and specification.

Typical use and users

Used by manufacturers of perforated plates and screening media, mining and aggregates industry engineers, plant designers, maintenance and procurement teams specifying or replacing screen plates, quality assurance personnel, and standards writers. Typical applications include vibrating and stationary screens for mineral processing, quarrying, recycling and other bulk material separation operations.

Related standards

Closely related documents include ISO 7805-2 (Industrial plate screens — Part 2: Thickness below 3 mm), ISO 10630 (Industrial plate screens — specifications and test methods), and various national adoptions and equivalents (national bodies often publish identical or adopted versions). Users should consult these when specifying plate thicknesses below 3 mm or when test methods and acceptance criteria are required.

Keywords

industrial plate screens; perforated plate; screening plates; perforations; round holes; square holes; pitch; open area; low‑carbon steel; sieve plates; mineral processing; ISO 7805-1:1984.

FAQ

Q: What is this standard?

A: ISO 7805-1:1984 is an international standard that defines perforation patterns, hole sizes and pitch ratios for industrial plate screens made from low‑carbon steel with thicknesses of 3 mm and above.

Q: What does it cover?

A: It covers three standard perforation patterns (round and square), nominal hole size ranges (approximately 3.15 mm up to 125 mm), five pitch‑to‑hole ratios and the resulting nominal open areas, plus designation guidance for plates used in screening applications.

Q: Who typically uses it?

A: Plate and screen manufacturers, plant and process engineers in mining, quarrying and recycling, procurement and maintenance teams specifying replacement screens, and testing/QA personnel responsible for accepting screening media.

Q: Is it current or superseded?

A: As published in April 1984 (ISO 7805-1:1984) this part has been subject to periodic ISO review and is listed as published and confirmed (most recently confirmed in the ISO review process on 25 November 2022). Always verify the current status with ISO or your national standards body before final specification or purchase.

Q: Is it part of a series?

A: Yes — it is Part 1 of the ISO 7805 series (Part 1 covers thicknesses ≥ 3 mm; Part 2 covers thicknesses below 3 mm). Other related ISO documents cover specifications and test methods for industrial plate screens.

Q: What are the key keywords?

A: industrial plate screens; perforated plates; hole size; pitch; open area; screening media; ISO 7805-1; low‑carbon steel; sieve plates.