This standard specifies the classification, labelling, technical requirements, test methods and identification of powered air-purifying respirators.
This standard is applicable to powered air-purifying respirators preventing particles, toxic and harmful gas or vapor.
This standard is not applicable to respirators used in combustible, explosive and oxygen-deficient environment and for escape.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 61241.1: 2004 Electrical Apparatus for Use in the Presence of Combustible Dust - Part 1: Protection by Enclosures "tD"
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 12903-2008 and the following apply.
3.1
powered air-purifying respirator; PAPR
the air-purifying respirator overcoming component resistance by air flow provided by electric fan
3.2
positive pressure
in any respiratory cycle, the internal pressure of such components as respirator facepiece, hood and breathing hose shall not be less than the ambient atmospheric pressure
3.3
negative pressure
in any air suction cycle, the internal pressure of such components as respirator facepiece and breathing hose may be less than the ambient atmospheric pressure.
3.4
tight-fitting facepiece
the protective facepiece isolating the respiratory tract from ambient air by tightly fitting with the wearer's facial skin. Tight-fitting facepieces are classified into half facepieces and full facepieces.
3.5
half facepiece
the tight-fitting facepiece capable of covering mouth and nose, or covering mouth, nose and lower jaw
[GB 2626-2006, as defined in 3.8]
3.6
full facepiece
the tight-fitting facepiece capable of covering mouth, nose, eyes and lower jaw
[GB 2626-2006, as defined in 3.9]
3.7
loose-fitting facepiece
the loose-fitting air introduction unit used for positive pressure respirator, which only covers eyes, nose and mouth and tightly fits with face in part
Note: as defined in 5.2.2.1 of modified GB/T 12903-2008.
3.8
loose-fitting hood
the loose-fitting air introduction unit used for positive pressure respirator, which is able to completely cover head, neck and part of the shoulder or is used together with protective clothing
Note: as defined in 3.1.12 of modified GB/T 18664-2002.
3.9
breathing hose
Foreword i 1 Scope 2 Normative References 3 Terms and Definitions 4 Classification and Labelling 4.1 Classification and Labelling of Powered Air-purifying Respirator (PAPR) 4.2 Classification, Labelling and Tinting of PAPR Filter Elements 5 Technical Requirements 5.1 General Requirements 5.2 Tight-fitting Facepiece 5.3 Loose-fitting Facepiece and Loose-Fitting Hood 5.4 Manufacturer’s Minimum Design Flow Rate (MMDF) and Manufacturer's Design Duration 5.5 Respiratory Resistance 5.6 Visor 5.7 Inward Leakage 5.8 Breathing Hose 5.9 Dead Space 5.10 Filter Element 5.11 Strength of Connecting Component 5.12 Noise 5.13 Flammability 5.14 Checking Device 5.15 Warning Device 5.16 Intrinsic Safety and Electrical Part 5.17 Mass 5.18 Practical Performance 5.19 Requirements for Fire-fighting PAPR 5.20 Information to be Provided by the Manufacturer 6 Test 6.1 Samples and Ambient Conditions of Test 6.2 Visual Checking 6.3 Pretreatment 6.4 Actual Flow Rate and Manufacturer's Design Duration 6.5 Respiratory Resistance 6.6 Visual Field 6.7 Mechanical Strength of Visor 6.8 Inward Leakage 6.9 Compression Resistance of Breathing Hose Hose 6.10 Dead Space 6.11 Filter Efficiency 6.12 Protective Time 6.13 Resistance of Multiple Filter Elements 6.14 Interactive Flow Rate of PAPR with Tight-fitting Facepiece 6.15 Tensile Strength 6.16 Noise 6.17 Flammability 6.18 Mass 6.19 Practical Performance 7 Identification 7.1 Identification Content 7.2 Identification Location Annex A (Normative) Test Methods for Electrical Insulation and Heat Resistance of Respirator Facepiece or Hood for Welding Protection Annex B (Informative) Application of Warning Device Annex C (Informative) Description on PAPR Application in Fire Fighting Annex D (Informative) Summary of Requirements for Test Sample Annex E (Normative) Assembly Method of Loose-fitting Hood (with Neck Sealing Design) with or without Head Fixing Device References Figure 1 Schematic Diagram for Test System of Actual Flow Rate of PAPR with Tight-fitting Facepiece Figure 2 Schematic Diagram for Test System of Actual Flow Rate of PAPR with Loose-fitting Hood with Neck Sealed Figure 3 Schematic Diagram for Test System of Actual Flow Rate of PAPR with Air Supply Fan inside Loose-fitting Facepiece Figure 4 Schematic Diagram for Test System of Actual Flow Rate of PAPR with Air Supply Fan outside Loose-fitting Facepiece Figure 5 Diagram for the Arrangement of Sampling Tube of Soft Hood Figure 6 Schematic Diagram for Test Device of Compression Resistance of Breathing Figure 7 Schematic Diagram for Test System of Interactive Flow Rate Figure 8 Schematic Diagram for Flammability Detection Device Figure E.1 Necklace with Regulable Flow Figure E.2 Schematic Diagram for the Test Method with Head Fixing Device Table 1 Classification and Labelling of PAPR Table 2 Classification, Tinting, Labelling and Prevented Pollutant Examples of PAPR Filter Elements Table 3 Technical Requirements for PAPR Inward Leakage Table 4 Requirements for the Protective Time of Types A/B/E/K Filter Elements Table 5 Requirements for the Protective Time of Type NO/Hg Filter Element Table 6 Requirements for the Protective Time of Type AN Filter Element Table 7 Requirements for the Protective Time of Type SX Filter Element Table 8 Requirements for the Protective Time of Type CO Filter Element Table 9 Strength Requirements for Connection and Connecting Component Table 10 Visual Field Assessment Table D.1 Summary of Sample Requirements in the Test Methods
