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.
GB/T 2428 Head-face Dimensions of Adults
GB 2626-2006 Respiratory Protective Equipment - Non-powered Air-purifying Particle Respirator
GB 2811-2007 Safety Helmet
GB 2890-2009 Respiratory Protection - Non-powered Air-purifying Respirators
GB/T 3609.1-2008 Occupational Eye and Face Protection - Welding Protection - Part 1: Welding Protector
GB/T 3609.2-2009 Occupational Eye and Face Protection - Welding Protection - Part 2: Automatic Welding Filter
GB/T 3785.1-2010 Electroacoustics - Sound Level Meters - Part 1: Specifications
GB 3836.1-2010 Explosive Atmospheres - Part 1: Equipment - General Requirements
GB 3836.4-2010 Explosive Atmospheres - Part 4: Equipment Protection by Intrinsic Safety "i"
GB/T 5703 Basic Human Body Measurements for Technological Design
GB 12476.4-2010 Electrical Apparatus for Use in the Presence of Combustible Dust - Part 4: Protection by Intrinsic Safety “iD”
GB/T 12903-2008 Personal Protective Equipment - Terminology
GB 14866-2006 The Specifications for Personal Eye-protectors
GB/T 18664-2002 Selection, Use and Maintenance of Respiratory Protective Equipment
GB/T 23465-2009 Respiratory Protective Equipment - Practical Performance Evaluation Methods
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.
