ISO 29042-9:2011 PDF

Safety of machinery — Evaluation of the emission of airborne hazardous substances — Part 9: Decontamination index

Title (English):

ISO 29042-9:2011

Safety of machinery — Evaluation of the emission of airborne hazardous substances — Part 9: Decontamination index

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 7
Publication date:: January 6, 2011
Edition:: ISO IS 29042 edition 1 version 1
ICS:: 13.110

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Description (English):

ISO 29042-9:2011 specifies a method for the measurement of the decontamination index of pollutant control systems, e. g. capture devices including local exhaust ventilation, water spray systems and, when appropriate, separation equipment installed on a machine. This method uses the real pollutant (see ISO 29042-1:2008, 4.2) and can be operated in room or field environments. Measurement of the decontamination index of a pollutant control system can serve for the: a) evaluation of the performance of a pollutant control system of a machine; b) evaluation of the improvement of a pollutant control system; c) comparison of pollutant control systems for machines of similar design; d) ranking of pollutant control systems according to their decontamination efficiency; e) determination of the air flow rate in the case of an exhaust system to achieve a given level; f) determination of the state of the art of pollutant control systems for machines with respect to the decontamination efficiency.

Technical details

Technical committee: ISO/TC 199 - Safety of machinery
SKU: ISO 29042-9:2011

Abstract

Overview

ISO 29042-9:2011, "Safety of machinery - Evaluation of the emission of airborne hazardous substances - Part 9: Decontamination index", defines a practical measurement method to quantify the decontamination index of pollutant control systems on machinery. The standard applies to capture devices (including local exhaust ventilation), water spray systems and separation equipment, using the real pollutant (per ISO 29042‑1) and can be applied in room or field environments. It is a Type‑B standard under ISO 12100 and is intended to help evaluate and compare the decontamination efficiency of control systems.

Key topics and requirements

Three‑phase measurement:
- Phase 1 - background concentration (machine and control system off).
- Phase 2 - machine and pollutant control system operating (measure Cmi).
- Phase 3 - machine operating with control system stopped or removed (measure Cai). Phases are repeated twice; sampling at each measurement point requires at least three readings.
Decontamination index definition: the index I is the average, over specified measurement locations, of the ratio of ambient air quality improvement to the real pollutant mean concentration without control - effectively (C_a − C_m) ÷ (C_a − C_f). If background is negligible, I reduces to the average(C_a / C_m) − 1.
Measurement point selection: pre‑testing to locate zones of measurable emission; type‑C standards may specify exact point numbers and positions.
Data and instrumentation: record machine/process data, ventilation and room geometry, air flow rates, environmental conditions, and use calibrated instruments. Applicable flow and sampling standards (e.g., ISO 3966, ISO 5167‑1, ISO 5168) should be followed.
Safety note: switching off pollutant control can raise hazardous concentrations; the standard warns of risks but does not prescribe protective measures.

Applications and users

ISO 29042‑9 is useful for:

Manufacturers and designers of machines and pollutant control systems evaluating performance and demonstrating compliance.
Test laboratories and occupational hygiene teams performing field or room tests of airborne hazardous substances.
Safety engineers and ventilation specialists determining required air flow rate for a target decontamination level.
Procurement and regulatory bodies comparing and ranking capture systems or assessing the state of the art.

Typical uses: performance evaluation, system improvement validation, comparative ranking, and establishing design targets for local exhaust ventilation and air cleaning.

Related standards

ISO 29042 series (Parts 1–8) - selection of test methods, tracer and test bench methods, capture and separation efficiency, pollutant concentration parameters.
Measurement and flow standards: ISO 3966, ISO 4006, ISO 5167‑1, ISO 5168, ISO 7708.

Keywords: ISO 29042-9, decontamination index, pollutant control system, capture device, local exhaust ventilation, airborne hazardous substances, emission evaluation, air flow rate, machinery safety.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and requirements

Three‑phase measurement:
- Phase 1 - background concentration (machine and control system off).
- Phase 2 - machine and pollutant control system operating (measure Cmi).
- Phase 3 - machine operating with control system stopped or removed (measure Cai). Phases are repeated twice; sampling at each measurement point requires at least three readings.
Decontamination index definition: the index I is the average, over specified measurement locations, of the ratio of ambient air quality improvement to the real pollutant mean concentration without control - effectively (C_a − C_m) ÷ (C_a − C_f). If background is negligible, I reduces to the average(C_a / C_m) − 1.
Measurement point selection: pre‑testing to locate zones of measurable emission; type‑C standards may specify exact point numbers and positions.
Data and instrumentation: record machine/process data, ventilation and room geometry, air flow rates, environmental conditions, and use calibrated instruments. Applicable flow and sampling standards (e.g., ISO 3966, ISO 5167‑1, ISO 5168) should be followed.
Safety note: switching off pollutant control can raise hazardous concentrations; the standard warns of risks but does not prescribe protective measures.

Applications and users

ISO 29042‑9 is useful for:

Manufacturers and designers of machines and pollutant control systems evaluating performance and demonstrating compliance.
Test laboratories and occupational hygiene teams performing field or room tests of airborne hazardous substances.
Safety engineers and ventilation specialists determining required air flow rate for a target decontamination level.
Procurement and regulatory bodies comparing and ranking capture systems or assessing the state of the art.

Typical uses: performance evaluation, system improvement validation, comparative ranking, and establishing design targets for local exhaust ventilation and air cleaning.

Related standards

ISO 29042 series (Parts 1–8) - selection of test methods, tracer and test bench methods, capture and separation efficiency, pollutant concentration parameters.
Measurement and flow standards: ISO 3966, ISO 4006, ISO 5167‑1, ISO 5168, ISO 7708.

Keywords: ISO 29042-9, decontamination index, pollutant control system, capture device, local exhaust ventilation, airborne hazardous substances, emission evaluation, air flow rate, machinery safety.

ISO 29042-9:2011 PDF

Technical details

Abstract

Overview

Key topics and requirements

Applications and users

Related standards

Related standards

Abstract

Overview

Key topics and requirements

Applications and users

Related standards

Related standards

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