Overview
EN ISO 5199:2002 - Technical specifications for centrifugal pumps - Class II (ISO 5199:2002) is a harmonized European/ISO standard that defines general design, testing and documentation requirements for Class II centrifugal pumps. It covers single‑stage and multi‑stage, horizontal and vertical pumps for general industrial use (typical example: chemical process industries). EN ISO 5199:2002 sits between Class I (most stringent) and Class III (least stringent) within the ISO pump classification system and was approved by CEN in March 2002.
Key topics and requirements
The standard addresses practical, safety and maintenance‑oriented design features rather than driver specifics (only rated power is required). Major technical topics include:
- Design and construction: impellers, shafts and shaft sleeves, bearings, running clearances, wear rings, pressure‑containing parts, branch/nozzle design and flanges.
- Shaft sealing: guidance on seal arrangements and auxiliary piping (informative annexes provide examples).
- Vibration, balance and critical speed considerations for reliable operation.
- External forces and moments on inlet/outlet flanges and branch connections.
- Materials: selection, composition, quality and repair considerations for pump components.
- Shop inspection, tests and final inspection: hydraulic acceptance testing (see ISO 9906), sound power/noise measurement references and inspection procedures.
- Preparation for dispatch: preservation, securing rotating parts, labelling and identification.
- Documentation and procurement: normative annexes include a pump data sheet, enquiry/proposal/purchase order content, and post‑order documentation requirements. Informative annexes give seal and piping examples, designation examples and a checklist.
Applications and users
EN ISO 5199:2002 is intended for:
- Pump manufacturers and designers specifying Class II centrifugal pumps.
- Purchasing agents and engineers creating enquiries, proposals and purchase orders.
- Plant engineers, maintenance teams and QA personnel who need acceptance testing, inspection and documentation standards.
- Specifiers in chemical processing and general industry where balanced reliability and cost are required.
Using EN ISO 5199:2002 helps ensure consistency in pump performance, interchangeability, maintainability and safety across installations.
Related standards
EN ISO 5199:2002 references and aligns with several ISO standards commonly used together:
For procurement or design work, reference EN ISO 5199:2002 alongside these standards to cover dimensional, performance, noise and testing requirements.
