NIOSH-approved respirators protect workers from airborne contaminants. They can filter outside air or supply clean air from a separate source. Respirators are classified by situation, duration, and respiratory risk. They can be submitted for approval with detailed specifications and must pass testing to be approved.
A NIOSH-approved respirator is a protective device designed to protect workers from airborne contaminants in breathing air sources. NIOSH is the National Institute for Occupational Safety and Health, a division of the US Centers for Disease Control and Prevention. A NIOSH-approved respirator can be one that removes contaminants from outside air or can supply breathable air from a clean source. Approved equipment is classified according to the situation in which it will be used, the duration of its operation and the type of respiratory risk for which it is designed. The respirators are approved by NIOSH to the standards set forth in Title 42, Part 84, of the United States Code of Federal Regulations.
Respirators are designed for two main applications: those that filter or clean outside air in non-life-threatening situations, and those that supply clean air from an alternative source. Non-powered respirators include those with a filter medium that removes particulate contamination such as dust or mist, and those with a chemical cartridge that removes or neutralizes specific gases or vapors. A gas mask is an unpowered unit containing a face piece and a canister or cartridge for the removal of gases such as carbon monoxide and ammonia fumes.
Powered units include compressed air respirators, i.e. those that supply air from an external source and are connected to the wearer with a hose and harness system. Compressed air systems may be designed to supply air only from a clean air source through a fan or may allow ambient air in if the fan is not running. A self-contained breathing apparatus supplies clean air only from a separate source, usually a portable pressurized tank. These units can be open circuit, where the exhaled air flows outside, or closed circuit, where the exhaled air is taken back and recycled through the unit. The self-contained breathing apparatus is used in situations where the ambient air has a hazardous and potentially life-threatening atmosphere.
The designation for a NIOSH approved respirator can be for entry to and escape from a potentially hazardous atmosphere or for escape only. The respirators are rated for use against oxygen deficiency, gases and vapors or particulate matter. Units can be approved for various prescribed duty times, from three minutes to four hours; other time intervals may be specified by NIOSH.
A respirator can be submitted for approval by NIOSH with a written application to the Branch of Certification and Quality Assurance. The application must include a detailed description of the respirator accompanied by drawings and specifications, construction details and materials used, a statement that the respirator has been tested for compliance including test results and a quality control plan to ensure consistent manufacturing standards . NIOSH will request a particular number of representative units from the manufacturer for inspection, examination and testing. A NIOSH approved respirator is one that has successfully passed the entire testing phase.
Protect your devices with Threat Protection by NordVPN
