Name: ISO 9902-4:2001 — Textile machinery — Noise test code — Part 4: Yarn processing, cordage and rope manufacturing machinery
SKU: ISO 9902-4:2001
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Abstract

Overview

ISO 9902-4:2001 is part of the ISO 9902 series and specifies the noise test code for yarn processing, cordage and rope manufacturing machinery. Taken together with ISO 9902-1 (Common requirements), this part sets the mounting, operating and measurement conditions required for the measurement, declaration and verification of noise emissions from machines such as doubling, twisting and texturing machines, reeling and winding machines, ball winders, cordage/rope makers, stranding/closing machines and braiding equipment.

Key topics and technical requirements

Scope and test grades: Applicable to engineering (grade 2) and survey (grade 3) methods referenced in the normative standards.
Sound power and emission levels:
- Determination of A-weighted sound power level (LWA) by sound intensity (ISO 9614-1 / ISO 9614-2) or sound pressure methods (ISO 3744, ISO 3747; ISO 3746 where others are impracticable).
- Determination of A-weighted emission sound pressure level (LpA) using ISO 11201 or ISO 11204; ISO 11202 allowed only where others are impracticable.
Workstation measurement options:
- Option d: multiple positions on a 1 m measurement line at 1.6 m height, spaced so adjacent positions are ≤ 2 m.
- Option e: three measurement positions at 1.6 m height (diagrammed in the standard). Measurement distance may be reduced to 0.5 m in constrained spaces (distance must be reported).
Machine-specific measurement conditions: Table 1 lists machine families and prescribes operating parameters to report (e.g., spindle speed, traverse speed, fan speeds, package/tube data, draw ratios). Very large machines are designated by letter “L”.
Other requirements: defining the test object, installation and mounting conditions, operating conditions, measurement uncertainties, information to be recorded and reported, and rules for declaration and verification (cross-referenced to ISO 9902-1).

Practical applications and users

Manufacturers of textile machinery use ISO 9902-4 to quantify and declare machine noise for product specification, design improvement and compliance.
Test laboratories and acoustic consultants apply the specified methods for repeatable sound power and emission measurements.
Occupational health & safety specialists and plant managers use results to assess workplace noise exposure and implement noise control.
Procurement and certification bodies rely on standardized declarations when comparing equipment and verifying vendor noise claims.

Related standards (normative references)

Key referenced standards include:

ISO 9902-1 (Common requirements)
ISO 9614-1 / ISO 9614-2 (sound intensity)
ISO 3743-1, ISO 3744, ISO 3746, ISO 3747 (sound power using sound pressure)
ISO 11201, ISO 11202, ISO 11203, ISO 11204 (emission sound pressure)
ISO 11111 (safety requirements for textile machinery)

Keywords: ISO 9902-4, textile machinery, noise test code, yarn processing, cordage, rope manufacturing, sound power level, emission sound pressure, noise measurement, acoustic testing, workplace noise.

ISO 9902-4:2001

Похожие стандарты

Abstract

Overview

Key topics and technical requirements

Practical applications and users

Related standards (normative references)

Технические детали

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