(a) Respirators, either with replaceable or reusable filters, designed as
respiratory protection against dusts, fumes, and mists having maximum acceptable
exposure limits not less than 0.05 milligram per cubic meter (mg/m3) of air.
(b) Respirators, with replaceable filters, designed as respiratory
protection against dust, fumes, and mists having maximum acceptable exposure limits
less than 0.05 mg/m3.
(c) Respirators, with replaceable filters, designed as respirator
protection against radon daughters, and radon daughters attached to dusts, fumes, and
(d) Respirators, with replaceable filters, designed as respirator
protection against asbestos containing dusts and mists. The Federal Asbestos
Standard (29 CFR 1910.1000) is very specific about respirators to be used for asbestos
(e) Single use dust respirators designed for protection against
pneumoconiosis and fibrous producing dusts, or dusts and mists, including asbestos.
(a) General. Protect against nonvolatile particles only. No protection
against gases and vapors. The filter shall be replaced or cleaned when breathing
becomes difficult due to plugging by retained particles. These respirators shall not be
used during shot and sand blasting operations.
(b) Half mask face pieces. Fabric coverings are only permissible in
atmospheres of coarse dust and mists of low toxicity. No protection is provided to the
(c) Mouthpiece respirator. Nose clip shall be firmly in place to prevent
nasal breathing. Mouth breathing prevents the detection of any incidental vapor
contaminants by odor. No protection is provided for the eyes.
e. Combination Gas, Vapor, and Particulate Removing Respirators.
(1) Description. These respirators include all the devices discussed having
either canisters or cartridges with filters for protection against dusts, mists, fumes,
gases, and vapors. These include respirators that have been tested against lacquer
and enamel mists (paint spray respirators).
(2) Limitations. With the exception that these devices protect against
gases, vapors, and particulates, the limitations of the other devices would also apply to
the combination device.