Standard
Track updates
AS/NZS 17420.7:2022
[Current]AS/NZS 17420.7:2022 adopts and modifies ISO 17420 7:2021 which specifies the requirements for supplied breathable gas respiratory protective device (RPD) and filtering RPD to be used for special application marine, mining, welding, and abrasive blasting for use in the workplace to protect the wearer.
Published: 23/12/2022
Pages: 32
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Classification overview
4.1 General
4.2 Supplied breathable gas RPD
4.3 Filtering RPD
5 General requirements for RPD
6 Basic requirements for supplied breathable gas RPD or filtering RPD
7 Special application for supplied breathable gas RPD for marine, mining, welding, abrasive blasting and filtering RPD formining, welding, abrasive blasting
7.1 Special application – Requirement matrices
7.1.1 General
7.1.2 Supplied breathable gas RPD
7.1.2.1 Supplied breathable gas RPD – Marine
7.1.2.2 Supplied breathable gas RPD – Mining
7.1.2.3 Supplied breathable gas RPD – Welding
7.1.2.4 Supplied breathable gas RPD – Abrasive blasting
7.1.3 Filtering RPD
7.1.3.1 Filtering RPD – Mining
7.1.3.2 Filtering RPD – Welding
7.1.3.3 Filtering RPD – Abrasive blasting
7.2 Requirements for special application RPD for marine, mining, welding and abrasive blasting
7.2.1 Thermal requirements
7.2.1.1 Temperature of operation – Supplied breathable gas RPD
7.2.1.2 Temperature of operation – Filtering RPD
7.2.1.3 Temperature of operation – level 0 – Supplied breathable gas RPD
7.2.1.4 Temperature of operation – level 0 – Filtering RPD
7.2.1.5 Temperature of operation – level 1 – Supplied breathable gas RPD
7.2.1.6 Temperature of operation – level 2 – Supplied breathable gas RPD
7.2.1.7 Temperature of operation – level 2 and flammability – Supplied breathable gas RPD
7.2.2 Resistance to flame of fabric materials – Supplied breathable gas RPD
7.2.3 Radiant heat
7.2.3.1 General
7.2.3.2 Radiant heat level 1 – Supplied breathable gas RPD and filtering RPD
7.2.3.3 Radiant heat level 2 – Supplied breathable gas RPD
7.2.4 Resistance to hot particles (embers/sparks/ash) – Supplied breathable gas RPD and filtering RPD
7.2.5 Chemical resistance of materials – Supplied breathable gas RPD
7.2.5.1 Chemical resistance – Supplied breathable gas RPD
7.2.5.2 Hazardous materials – Supplied breathable gas RPD
7.2.6 Chemical resistance of visor only – Supplied breathable gas RPD and filtering RPD
7.2.7 Contact with hot and cold surfaces generated by the RPD
7.2.7.1 Contact with hot and cold surfaces – Supplied breathable gas RPD
7.2.7.2 Contact with hot surfaces – Filtering RPD
7.2.8 Avoidance of frictional sparks – Supplied breathable gas RPD and filtering RPD
7.2.9 Mechanical Requirement
7.2.9.1 Connections – Supplied breathable gas RPD
7.2.9.1.1 Connections to RI – Supplied breathable gas RPD
7.2.9.1.2 Connections to RI — Filtering RPD
7.2.9.1.3 Connections other than to the RI – Supplied breathable gas RPD
7.2.9.1.4 Connections other than to the RI – Filtering RPD
7.2.9.2 Abrasion resistance of visor – Supplied breathable gas RPD and filtering RPD
7.2.9.3 Exposure to dust – Supplied breathable gas RPD and filtering RPD
7.2.10 Requirements for audible warning devices – Supplied breathable gas RPD
7.2.11 Practical performance requirements – Supplied breathable gas RPD and filtering RPD
7.2.11.1 Passing through a square hatchway – Supplied breathable gas RPD
7.2.11.2 Removing the RPD from the position as donned – Supplied breathable gas RPD
7.2.11.3 Field of vision for welding RPD – Supplied breathable gas RPD and filtering RPD
7.2.11.4 Field of vision for abrasive blasting RPD – Supplied breathable gas RPD and filtering RPD
7.2.11.5 Eye irritation (external) – Supplied breathable gas RPD and filtering RPD
7.2.11.6 Operation during submersion – Supplied breathable gas RPD
7.2.11.7 Resistance to water splash – Supplied breathable gas RPD and filtering RPD
7.2.11.8 Communication performance (speaking and hearing) – Supplied breathable gas RPD
7.2.12 Requirements for RPD used in explosive atmospheres – Supplied breathable gas RPD and filtering RPD
7.2.12.1 Intrinsic safety and electromagnetic compatibility – Supplied breathable gas RPD and filtering RPD
7.2.12.1.1 Intrinsic safety and electromagnetic compatibility – General
7.2.12.1.2 Intrinsic safety and electromagnetic compatibility – Mining
7.2.12.1.3 Intrinsic safety and electromagnetic compatibility – Marine
7.2.13 Antistatic properties – Supplied breathable gas RPD and filtering RPD
7.2.13.1 Antistatic properties – General
7.2.13.2 Antistatic properties – Mining
7.2.13.3 Antistatic properties – Exposed RPD hoses
7.3 Pre-conditioning of supplied breathable gas RPD and filtering RPD
7.3.1 General
7.3.2 Exposure to vibration and shock – Marine – Supplied breathable gas RPD
7.3.2.1 General
7.3.2.2 Resonance search vibration-marine
7.3.2.3 Endurance vibration-marine
7.3.2.4 Exposure to shock-marine
7.3.3 Exposure to vibration and shock – Mining – Supplied breathable gas RPD and filtering RPD
7.3.3.1 General – Supplied breathable gas RPD and filtering RPD
7.3.3.2 Exposure to vibration – Mining – Supplied breathable gas RPD and filtering RPD
7.3.3.3 Exposure to shock-mining – Supplied breathable gas RPD and filtering RPD
7.3.4 Resistance to changes in atmospheric pressure – Supplied breathable gas RPD and filtering RPD
7.3.4.1 Exposure to positive pressure – Supplied breathable gas RPD and filtering RPD
7.3.4.2 Exposure to negative pressure – Supplied breathable gas RPD and filtering RPD
7.3.5 Enhanced resistance to corrosion – Intermittent exposure – Supplied breathable gas RPD and filtering RPD
7.3.6 Exposure to impact from drop
7.3.6.1 Supplied breathable gas RPD
7.3.6.2 Filtering RPD and replaceable filters
7.3.7 Exposure to abrasive blasting – Supplied breathable gas RPD and filtering RPD
8 Testing
8.1 General
8.2 Inspection
8.3 Hose permeation
8.3.1 Hose material
8.3.2 Sampling air
8.3.3 Test equipment
8.3.3.1 General
8.3.3.2 Exposure chamber
8.3.3.3 Detection system
8.3.3.3.1 Challenge concentration monitoring system
8.3.3.3.2 Sampling air concentration monitoring system
8.3.3.3.3 Challenge delivery system
8.3.3.3.4 Sampling air supply system
8.3.3.4 Preparation
8.3.3.4.1 Hose assembly – Gas test set up
8.3.3.4.2 Hose assembly – Liquid droplet test set up
8.4 Testing of leak tightness using positive pressure
9 Marking
10 Information supplied by the RPD manufacturer
Appendix ZZ
ZZ.1 Scope
ZZ.2 Modifications
Cited references in this standard
[Current]
Rubber and plastics hoses and hose assemblies - Determination of electrical resistance and conductivity
[Current]
Corrosion tests in artificial atmospheres - Salt spray tests - AMENDMENT 1: Footnote of Warning
[Current]
Protective clothing against heat and flame - Part 1: Test method for complete garments - Measurement of transferred energy using an instrumented manikin
[Current]
Respiratory protective devices - Methods of test and test equipment - Part 1: Determination of inward leakage
[Current]
Respiratory protective devices - Methods of test and test equipment - Part 2: Determination of breathing resistance
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