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BS ISO 17420-2:2021

BS ISO 17420-2:2021

$215.11

Respiratory protective devices. Performance requirements – Requirements for filtering RPD

Published By Publication Date Number of Pages
BSI 2021 86
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This document specifies requirements for the performance and testing of filtering respiratory protective devices (RPD) in accordance with their classification and for use in the workplace to protect the wearer from hazardous atmospheres and/or environments.

Requirements for RPD elements and components are also specified in this document.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
10 3 Terms, definitions, abbreviations and symbols
3.1 Terms and definitions
11 3.2 Abbreviated terms
12 3.3 Symbols
13 4 Classification overview
14 5 General requirements for RPD
5.1 General
5.2 Field of vision
5.3 Resistance to flame – Single burner dynamic
5.4 Compatibility with additional equipment
5.5 Monitor performance
5.6 Warning device(s), checking device(s) and control means
5.6.1 Performance of warning device(s), if applicable
15 5.6.2 Performance of checking device
5.6.3 Control means (if applicable)
5.7 Protection class determination
5.7.1 General
5.7.2 Total inward leakage (TIL)
5.7.3 Total inward leakage requirement for RPD not using a standardized connector
16 5.8 Validation by practical performance
5.8.1 General
5.8.2 Donning/doffing
5.8.3 Communication performance – hearing and speech
5.8.4 Eye irritation caused by the RPD
5.8.5 Fogging of visor
5.8.6 Ergonomic requirements
5.9 Requirements for elements/components
6 Requirements for filtering RPD
6.1 Determination of air flow rate of assisted RPD
17 6.2 Determination of the effect of temperature on flow rates for assisted RPD
6.3 Work of breathing, breathing resistance (peak pressure) and elastance
6.3.1 Work of breathing, breathing resistance (peak pressure) and elastance for unassisted RPD
18 6.3.2 Work of breathing, breathing resistance (peak pressure) and elastance for assisted RPD
20 6.4 CO2 concentration limits
6.4.1 CO2 concentration limits for assisted RPD
6.4.2 CO2 concentration limits of unassisted RPD
6.4.3 CO2 concentration limits for RI with standardized connector
21 6.5 Noise limit for assisted RPD
6.6 Temperature and humidity of inhaled air for RPD which protect against CO
6.7 Connections
6.7.1 General
22 6.7.2 Strength of connections – Connections to RI
24 6.7.3 Low pressure connections other than to the RI
25 6.8 Assessment of reliability
6.9 Pre-conditioning (Sequential/Non-sequential)
6.9.1 General
26 6.9.2 Sequential pre-conditioning
27 6.9.3 Non-sequential pre-conditioning
6.10 Requirements for elements/components
6.10.1 Filters
38 6.10.2 Flexibility and resistance to deformation of hoses
39 6.11 Requirements for RPD with standardized connector
6.11.1 General
6.11.2 Filters with standardized connector
41 6.11.3 RI with standardized connector
42 6.11.4 Protection class determination for RPD using standardized connector
6.11.5 RPD using standardized connector and low pressure hoses
43 6.12 Multi-functional RPD
6.13 Requirements for optional features
6.13.1 General
6.13.2 Extreme low temperature requirements
44 6.13.3 Extreme high temperature requirements
6.13.4 Contact with hot surface
6.13.5 Hydration
45 6.13.6 Performance of RPD using prefilters
6.13.7 Use of RPD in potentially explosive atmospheres
6.13.8 Electromagnetic compatibility of RPD
7 Testing
7.1 General
7.2 Inspection
46 7.3 Testing of leak tightness using positive pressure
7.4 Contact with hot surface
8 Marking
8.1 General
8.2 Marking of RPD without separable components
47 8.3 Marking of RPD replacement parts
8.4 Marking of RPD components as part of a system
8.4.1 RI
48 8.4.2 Marking of particle, gas/vapour or combination filters
8.4.3 Other separable components
49 9 Information supplied by the RPD manufacturer
9.1 General
9.2 RPD
9.2.1 Minimum information
50 9.2.2 Additional information
9.3 RPD components and replacement parts
9.3.1 Particle, gas/vapour or combination filters
51 9.3.2 RI
52 9.3.3 Other components or replacement parts
53 Annex A (informative) Reliability
55 Annex B (informative) Example of failure modes and effect analysis (FMEA)
59 Annex C (normative) Test schedules
82 Annex D (normative) Normalisation of test results
84 Bibliography

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BS ISO 17420-2:2021
$215.11