ISO 3284-1974 rus PDF

Full title and description

ISO 3284:1974 — Continuous mechanical handling equipment for loose bulk materials — Dimensions of bends for use in pneumatic handling. This international standard specifies standardised geometric dimensions for pipe bends (elbows) intended for pneumatic conveying of loose bulk materials; it has been published in the ISO catalogue and is available in the original English and French texts (national adoptions and translations may exist).

Abstract

Specifies the dimensions of bends for use in pneumatic handling for loose bulk materials, giving recommended dimensions organised into three series of service duty: light, moderate and heavy. The standard provides tabulated bend sizes and symbols for key geometric parameters.

General information

• Status: Published (standard confirmed by ISO).
• Publication date: December 1974 (1974-12 / 01 Dec 1974).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 53.040.30 (Pneumatic transport and its components).
• Edition / version: Edition 1 (1974).
• Number of pages: 2 (short technical specification with tables/diagrams).

Key bibliographic details above as recorded in the ISO catalogue and national standards catalogues.

Scope

ISO 3284:1974 covers the dimensional specification of bends (elbows) used in pneumatic conveying pipelines for loose bulk materials. It defines geometric parameters and symbols (for example internal diameter D, mean radius R, exterior diameter, and straight socket length) and gives recommended dimensions grouped into three series — light, moderate and heavy duty — to suit differing service conditions and pipe diameters. The standard is intended for designers and manufacturers of pneumatic conveying systems and components.

Key topics and requirements

• Standardised bend geometry for pneumatic conveying systems (elbow radii, diameters and socket/ spigot lengths).
• Three duty series (light, moderate, heavy) with tabulated dimensions for each series and range of pipe sizes.
• Use of defined symbols and nominal dimensions to ensure interchangeability and predictable flow characteristics.
• Applicability to loose bulk materials conveyed pneumatically; does not provide material-specific wear or hydraulic/performance calculations (focus is on dimensional standardisation).
• Designed for integration with other ISO standards on pneumatic conveying components and safety.

Typical use and users

Engineers and designers of pneumatic conveying systems, equipment manufacturers (pipe and fitting makers), plant engineers in bulk-handling industries (mining, cement, food, chemical, agriculture), standards bodies and testing laboratories use ISO 3284 as a reference for specifying and producing standard bends to ensure fit, compatibility and predictable installation geometry. National standards organisations often adopt or reference ISO 3284 when publishing local equivalents.

Related standards

ISO 3284 is part of the family of standards for continuous mechanical handling equipment and pneumatic conveying; related documents include standards on piping dimensions (ISO 2327:1972), couplings and hose components (ISO 5031:1977), and various national adoptions/identical standards (for example BIS identical adoption). Modern safety and system standards such as EN 741 (systems and components safety requirements for pneumatic handling) are also related for overall system design.

Keywords

pneumatic conveying, bends, elbows, dimensions, pneumatic handling, bulk materials, ISO 3284, pipe fittings, continuous mechanical handling equipment.

FAQ

Q: What is this standard?

A: ISO 3284:1974 is an international standard that specifies the dimensions of pipe bends used in pneumatic conveying systems for loose bulk materials. It provides standardised sizes and symbols to promote compatibility and consistent installation geometry.

Q: What does it cover?

A: It covers geometric dimensions of bends (elbows) — internal diameter, mean radius, socket lengths and related dimensional data — organised into three service-duty series: light, moderate and heavy. It focuses on dimensional standardisation rather than performance modelling.

Q: Who typically uses it?

A: Mechanical and process engineers, pipe and fitting manufacturers, OEMs for pneumatic conveying equipment, plant maintenance and procurement teams in industries handling bulk solids, and standards/technical committees when specifying or adopting components. National standards bodies may also adopt the ISO text as a national standard.

Q: Is it current or superseded?

A: According to ISO catalogue entries and national catalogue records, ISO 3284:1974 remains listed as published and confirmed (ISO review stage 90.93). Users should check their national standards body for any later national revisions or adopting documents before use in new designs.

Q: Is it part of a series?

A: Yes — it is part of ISO/TC 101 work on continuous mechanical handling equipment and complements other ISO documents on pneumatic piping and components (for example ISO 2327 and ISO 5031). Various national adoptions and related EN standards address safety and system-level requirements.

Q: What are the key keywords?

A: Pneumatic conveying, bends, elbows, bulk materials, dimensions, fittings, pipe geometry, ISO 3284.