Overview
ISO 2327:1972 - Pneumatic handling appliances for loose bulk materials - Piping defines standard piping dimensions used in pneumatic conveying systems for loose bulk materials. Published by ISO (Technical Committee ISO/TC 101), the standard specifies internal diameter (D), external diameter (D1) and wall thickness (e) for pipe in three strength series: light, medium, and strong. Dimension values are given in millimetres and a tabulated range covers typical conveying installations.
Key Topics
- Scope and purpose: standardizes pipe dimensions for pneumatic handling of bulk solids to support interchangeability and system design.
- Dimensional parameters: internal diameter (D), external diameter (D1) and wall thickness (e) are defined and tabulated.
- Three series: pipes categorized as light, medium or strong according to wall thickness and mechanical capability.
- Tabulated sizes: the table lists commonly used diameters (approximately 48.3 mm up to 368 mm) and corresponding external diameters and thicknesses.
- Normative notes: recommended sizes are highlighted in the original table; the standard cross-references ISO/R 336 for steel tube dimensions and mass per unit length.
Applications
ISO 2327:1972 is directly applicable to the design, specification and procurement of piping used in pneumatic conveying systems handling loose bulk materials such as powders, granules and pellets. Typical applications include:
- Pneumatic conveyors in cement, chemical, food processing and agricultural industries
- Bulk handling equipment in mining, ports and logistics terminals
- Plant piping layout for material transfer, suction and pressure lines
- Specification and tender documents for OEMs and system integrators
Practical uses:
- Select appropriate pipe diameter and wall thickness for convey line capacity and wear resistance
- Ensure compatibility and interchangeability between suppliers and system components
- Reference a recognized international dimension set when preparing procurement specifications
Who uses this standard
- Mechanical and process engineers designing pneumatic conveying systems
- Pipe and tube manufacturers producing standardized conveying piping
- Equipment OEMs, fabricators and plant operators
- Procurement and quality engineers specifying material and dimensional compliance
Related Standards
- ISO/R 336 - Steel tubes (welded and seamless): general table of dimensions and masses (referenced in ISO 2327 for tube dimensional data)
- Industry-specific pneumatic conveying guidance and wear/abrasion standards (consult local and sector standards for material selection and testing)
By standardizing piping sizes for pneumatic handling, ISO 2327:1972 helps reduce design ambiguity, improves supplier interoperability and streamlines procurement for bulk-material conveying systems.