EN ISO 9902-5:2001 PDF

Overview

EN ISO 9902-5:2001 - Textile machinery - Noise test code - Part 5: Weaving and knitting preparatory machinery (ISO 9902-5:2001) is the CEN-adopted part of the ISO 9902 series that specifies the mounting, operating and measuring conditions for determining, declaring and verifying noise emitted by weaving and knitting preparatory machines. Used together with ISO 9902‑1 (common requirements), this part covers machines defined in ISO 2544 for warping, beaming and sizing and applies to engineering methods (grade 2) and survey methods (grade 3).

Key topics and technical requirements

• Scope and test object definition: Applies to section warping (creel-based), beaming and direct beaming/direct warping machines used in weaving and knitting preparation.
• Measurement objectives: Determines A-weighted sound power level (LWA) and emission sound pressure level (LpA) for noise declaration and verification.
• Accepted measurement methods: References internationally recognised acoustics standards for core measurement techniques, including:
  • Sound intensity methods: ISO 9614‑1 / ISO 9614‑2
  • Sound power by pressure methods: ISO 3744 / ISO 3746 / ISO 3747
  • Emission sound pressure at a workstation: ISO 11201 / ISO 11202 / ISO 11204
• Workstation and position definitions: Provides specific measurement position options (e.g., linear arrays at 1 m from the machine surface and heights of 1.6 m; spacing rules such as maximum 2 m between adjacent positions) to ensure reproducible LpA values for weaving and knitting preparatory machinery.
• Installation, operating and reporting rules: Complements ISO 9902‑1 requirements on mounting, operating conditions, uncertainty evaluation and the information that must be recorded and reported for noise declarations.
• Special cases: Identifies designation of very large machines (marked “L”) and the related measurement considerations.

Practical applications and users

Who benefits from EN ISO 9902-5:2001:

• Textile machinery manufacturers - to declare machine noise levels for technical data sheets and CE compliance.
• Acoustic test laboratories and certification bodies - to perform repeatable noise tests and verification using grade‑2 and grade‑3 methods.
• Design and R&D engineers - to benchmark and reduce equipment noise in new machine designs (warping, beaming, sizing).
• Compliance officers and purchasers - to compare equipment noise performance and meet occupational noise and Machinery Directive requirements.
• Occupational health and safety teams - to assess workstation noise exposure in textile production lines.

Related standards

• ISO 9902 series (Parts 1–7) - general and other textile machinery noise test codes
• ISO 2544 - vocabulary and machine types for warping processes
• Acoustics references: ISO 9614‑1/2, ISO 3744/3746/3747, ISO 11201/11202/11204

EN ISO 9902-5:2001 is an essential reference for consistent, standardized noise measurement and declaration across weaving and knitting preparatory machinery, aiding regulatory compliance and practical noise management in textile manufacturing.