ISO 29042-5:2010

Overview

ISO 29042-5:2010 is an internationally recognized standard developed by the International Organization for Standardization (ISO) focused on the safety of machinery with respect to airborne hazardous substances. Specifically, Part 5 of ISO 29042 outlines a test bench method for measuring the separation efficiency by mass of air cleaning systems with unducted outlets. This standard applies to systems designed to remove aerosols (including smoke, dust, fumes, and mist), as well as vapors and gases from the air.

The standard establishes a systematic approach to evaluate how effectively such air cleaning systems reduce the mass of airborne pollutants emitted from machinery during normal operation. It is crucial for ensuring occupational safety, regulatory compliance, and environmental health when machines release potentially dangerous substances into the air.

Key Topics

• Separation Efficiency by Mass: The fundamental metric defined by ISO 29042-5 measures the ratio between the mass of pollutant retained by the air cleaning system and the mass entering it. The efficiency is represented as a percentage, providing a quantitative basis for performance evaluation.

• Test Bench Methodology: The standard specifies a detailed test bench setup. This includes components such as a test cabin, inlet and outlet ducts, injection points for the test substance, measurement planes, and air movers to simulate operational airflows under controlled conditions.

• Measurement Principles: Pollutant mass is assessed both upstream and downstream of the air cleaning system at defined time intervals. Measurements consider variables like air volume flow rates, pollutant concentration, particle size distribution, and temporal changes to ensure accuracy.

• Test Substance Selection: Real pollutants or low-toxicity surrogates that simulate aerosols, gases, or vapors relevant to the application are used during testing to validate the air cleaner’s performance.

• Operational Conditions: The air cleaning system under test is operated according to manufacturer guidelines and intended use, ensuring the results represent real-world conditions.

• Result Expression and Reporting: The standard mandates precise calculation of separation efficiency, supported by thorough documentation covering equipment details, environmental conditions, measurement methods, and any deviations encountered.

Applications

ISO 29042-5:2010 serves as a crucial reference for multiple stakeholders involved in the design, testing, certification, and operation of air cleaning systems used with machinery, including:

• Manufacturers of Air Cleaning Systems: To evaluate and improve filtration and purification technologies designed to reduce hazardous emissions in industrial environments.

• Industrial Safety Engineers: For assessing the effectiveness of air cleaners in protecting workers from exposure to airborne chemicals, dust, and fumes during machinery operation.

• Regulatory Bodies: In verifying compliance with workplace safety and environmental protection legislations that govern emissions from industrial machines.

• Testing Laboratories: Utilizing the test bench methodology to generate reproducible, standardized data on system performance for certification and comparison purposes.

• Environmental Health Specialists: To monitor and rank air cleaning systems according to their ability to separate toxic substances by mass, supporting risk assessment and pollution control strategies.

Related Standards

ISO 29042-5:2010 forms part of a broader series under the general title "Safety of machinery - Evaluation of the emission of airborne hazardous substances." Related parts include:

• ISO 29042-1: Selection of test methods for emission evaluation
• ISO 29042-2: Tracer gas method for pollutant emission rate measurement
• ISO 29042-3: Test bench method for emission rate measurement of a pollutant
• ISO 29042-4: Tracer method for capture efficiency measurement of exhaust systems
• ISO 29042-6: Test bench method for separation efficiency measurement of air cleaning systems with ducted outlets
• ISO 29042-7: Test bench method for pollutant concentration parameter measurement

Additionally, ISO 12100 provides foundational principles for risk assessment and machinery design safety, complementing the framework established by ISO 29042-5.

By adhering to ISO 29042-5:2010, organizations ensure a consistent, validated approach to gauging air cleaning system performance with unducted outlets, ultimately contributing to safer machinery environments and improved air quality control.