Overview
EN ISO 9902-5:2001/A2:2014 - "Textile machinery - Noise test code - Part 5: Weaving and knitting preparatory machinery" is a CEN-adopted amendment to the ISO noise test code that specifically addresses noise emitted by preparatory machines used in weaving and knitting processes. The amendment was developed in parallel by ISO and CEN (ISO/TC 72 and CEN/TC 214) and supports conformity with relevant EU Directives through an informative Annex ZA. It clarifies measurement expectations and practical limits for acoustic testing of textile preparatory equipment.
Key topics and requirements
- Scope: Noise testing guidance for weaving and knitting preparatory machinery (e.g., warping, sizing, beaming, creeling and similar preparatory machines as identified by ICS codes 59.120.30 / 59.120.40).
- Noise measurement code: Provides a harmonized framework for measurement conditions, instrumentation, and reporting to characterise sound emission from textile preparatory machines.
- Measurement conditions: Emphasises strict requirements for test environments and procedures. The amendment includes an important note that grade 1 measurement methods (highest precision) are normally not feasible for textile machinery because of the demanding environmental and setup conditions they require.
- Reporting and documentation: Standardises how test results, uncertainty and test conditions should be recorded so results are reproducible and comparable.
- Regulatory alignment: Annex ZA links the standard to the Essential Requirements of EU machinery directives, clarifying how conformity with the normative clauses can support CE-marking and regulatory compliance.
Practical applications
- Manufacturers: Use the standard to measure and document machine noise for product design, marketing, and to demonstrate conformity with EU requirements.
- Test laboratories and acoustic consultants: Apply the test code when conducting sound emission assessments and preparing test reports for clients in the textile sector.
- Safety and occupational professionals: Use results to assess workplace noise exposure linked to preparatory machinery and to inform hearing conservation and engineering controls.
- Procurement and standards teams: Include standardized noise metrics in technical specifications for buying or certifying weaving/knitting preparatory equipment.
Related standards and context
- EN ISO 9902 series (other parts) - covers noise test codes for different types of textile machinery.
- ISO/CEN collaboration and the Vienna Agreement - the amendment was processed under ISO-led parallel processing to ensure international and European alignment.
- EU machinery directives - Annex ZA provides a pathway for presumption of conformity to essential safety and health requirements when the standard is applied.
Keywords: EN ISO 9902-5, noise test code, textile machinery, weaving preparatory machinery, knitting preparatory machinery, noise emissions, acoustic testing, CEN, ISO, EU Directive, measurement conditions.
