Here is everything you need to know about dust mask ratings - the same safety standards are used for respirator ratings and the specifications of face masks. After reading, you should know the different dust mask protection levels and the rating system used in respiratory PPE before you choose a dust mask for work. You should also have a good idea of which dust mask or face mask rating you will require for the job you are doing and the dust protection you need.
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Silly question, but we need to start somewhere...
Disposable or half-face dust masks offer respiratory protection against particulate hazards and airborne particles like dusts (anything from wood dust to brick dust to household dusts), powders and aerosols (aka: Aqueous Fog). That is, they filter out bad stuff from the air you breath so you don't inhale poisons or hazardous dust particulates.
Dust masks are vital for a range of industries: construction, agricultural, pharmaceutical, and even for your DIY projects at home. The FFP1, FFP2, FFP3 ratings offer different levels of protection so it is vital you find the correct level of protection you need from a respirator.
Respiratory protection in the form of disposable dust masks come in three respirator ratings: FFP1, FFP2, and FFP3 - FFP stands for "Filtering Face Piece" and the number denotes the level of protection. Many people shorten these acronyms even more as P1, P2 & P3 - but the meaning and level of respiratory protection is the same.
Some people refer to these ratings as respirator codes, respirator filter codes, or respirator grades but we are essentially discussing the very same things.
Each of these types of mask will specify their suitability for the "Occupational Exposure Limit" (OEL) and their "Assumed Protection Factor" (APF).
We use these acronyms throughout this article, and they are in common use within the H&S industry, so you would do well to try and remember them.
When choosing a face mask you need to determine which dust mask ratings you need for your workplace hazards (although your employer should identify the hazards for you and provide the correct PPE) or your home DIY hazard.
The seeker after truth should be humbler than the dust.Workers often choose not to wear a dust mask because it feels uncomfortable, men may need to shave everyday (so the mask fits correctly on the face), it may interfere with other PPE (such as their goggles or face screen), other people on site do not wear them and they want to fit in, and many other factors.
However, the risks of not wearing the correct respirator mask with the correct ratings are many and you could develop harmful and life threatening lung conditions.
Remember: The wrong protective face mask is no protection at all
A dust mask can protect you from developing painful coughs, wheezing, shortness of breath, chest tightness, and difficulty breathing - as well as more serious long-term or terminal conditions like lung cancer, chronic obstructive pulmonary disease (COPD) and even mesothelioma.
Image Credit: HSEThe mask should be tight fitting, and a fit test should always be performed when fitting a new face mask.
The statistics for respiratory diseases from the /23 HSE report make for sobering reading. There are 12,000 deaths associated with respiratory hazards after long-term exposure and 18,000 estimated new cases of self-reported work-related breathing or lung problems ANNUALLY.
Please do not become a statistic - Choose the right dust mask for the hazards around you.
DO NOT DO THIS.What does a P1 filter protect against?
What does a P2 filter protect against?
What does a P3 filter protect against?
A P3 filter or mask would be the minimum required face mask for chemical fumes, but we would recommend a Half Face Respirator with a P3 Cartridge Filter rather than a disposable dust mask. The same goes for a Dust mask for Asbestos protection - although a disposable P3 dust mask is sufficient, we recommend a half mask with a P3 cartridge or contact us for a full face mask solution.
There are many different types of dust mask, both disposable and reusable, here are some examples of each mask rating to give you some idea of what is available to buy.
A quick read of this article on the current PPE regulations will soon tell you.
Construction dust can cause serious damage to workers&#; health and life-threatening diseases. Construction workers can be exposed to many types of dust, such as silica, wood, and lead dust. Workplace exposure to small particles of silica dust, also known as respirable crystalline silica, can lead to serious diseases, including silicosis, a progressive lung disease marked by scarring and thickening of the lung tissue; lung cancer; chronic obstructive pulmonary disease (COPD); and kidney disease. It&#;s estimated that about 2 million construction workers are exposed to silica dust on the job [CDC ].
NIOSH sets Recommended Exposure Limits (RELs), including a suggested limit of exposure to silica dust. A recent study of workers exposed to silica dust by industry published in the American Journal of Industrial Medicine found that of 100,000 workers who were exposed above the NIOSH REL, 8 out of 10 of those workers were in the construction industry [Doney et al. ].
Construction workers can be exposed to silica dust from many sources. For example, concrete workers can be exposed to silica dust during mixing, sawing, jackhammering, chipping, grinding, and cleaning operations. Masons can be exposed when cutting concrete blocks and bricks, mixing mortar, and tuckpointing. Tile workers can be exposed when cutting ceramic tiles or stone. Highway, street, and bridge construction workers can be exposed during abrasive blasting, drilling, milling, breaking, and cutting concrete. Site preparation workers can be exposed during earthmoving, excavation and trenching, and demolition, and drywall workers can be exposed when cutting drywall and sanding joints.
The Occupational Safety and Health Administration (OSHA) silica dust standard for construction requires employers to limit worker exposures to silica dust and protect them [29 CFR .]. Table 1 in 29 CFR . has simplified the compliance process in construction by matching 18 common construction tasks with effective dust control methods and respiratory protection. Employers who use the controls specified in Table 1 are in compliance when they perform those tasks. If controls are not being used, or when performing tasks not listed in Table 1, employers are required to conduct air sampling to measure workers&#; exposure to silica or obtain objective data to demonstrate that they comply.
In many cases, engineering controls are not adequate for safely controlling dust, and respirators must be used. A respirator is designed to protect workers from inhaling hazardous dusts when properly used. OSHA regulations govern the use of respirators in construction [29 CFR .103]. If respirators are used, a respiratory protection program is required to ensure that they are used properly. OSHA mandates specific requirements for the use of respirators [29 CFR .134(c)].
If your workplace is in compliance with dust standards, employers can permit workers to wear air-purifying respirators, following OSHA&#;s (Mandatory) Information for Employees Using Respirators When not Required Under Standard [.134 App D ]. Under this Appendix, the employer must meet the following OSHA requirements:
Selecting the right air-purifying respirator requires an assessment of workplace operations, processes or environments that may create a respiratory hazard [NIOSH ].
NIOSH-approved air-purifying masks are available in two broad classes: non-powered and powered. Non-powered are sometimes referred to as negative-pressure respirators, and powered respirators are referred to as PAPRs (powered air-purifying respirators).
Several filter materials are available for negative-pressure respirators. Since some filters are degraded by oil mist, replaceable filter cartridges are designated according to their level of oil resistance, as follows:
For mineral dusts, such as silica, any of these filters will work unless the workplaces has an oil mist source. The most common oil mist sources in construction comes from percussion drills. These workplaces should use type R or P filters. If oil mist is present, N-series filters will not be effective and should not be used. R-series filters should be used for one shift, and P-series filters should be changed in accordance with the manufacturer&#;s recommendations [NIOSH ].
The dust (or mist) collection efficiency of filter materials also varies. Filter cartridges are available in three efficiency levels: 95%, 99%, and 99.97%, designated as 95, 99, and 100. For example, an N95 filter is 95% efficient; an N99 filter is 99% efficient; and an N100 filter is 99.97% efficient.
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The most commonly purchased filter types are N95s and P100s. Type 95 filters usually have a lower cost and breathing resistance than type 100 filters. As the letter rating and number rating increase, breathing fatigue will also increase.
Reusable half-masks and face-filtering respirators are non-powered negative-pressure respirators.
A reusable half-mask, negative-pressure respirator, consists of a filter-holding unit called the facepiece or mask, fabricated from molded plastic or rubber. The mask contains intake and exhaust valves and is attached to straps that ensure a tight fit to the wearer&#;s face.
This type of half-mask respirator has a replaceable-filter that removes dust when the facepiece seal is leak-tight. The seal can occasionally cause skin irritation. These respirators also interfere with conversation and may interfere with eyeglasses or goggles.
FFRs, commonly called dust masks are another type of negative pressure air purifying respirator. FFRs have a lighter design than half-mask respirators. The entire mask is fabricated from filter material that covers the mouth and nose.
FFRs offer some advantages compared to the replaceable-filter respirators. In particular, they are more comfortable and require no maintenance. It may be harder to pass a fit test with an FFR than a reusable half-mask. As a result, they are often much less effective than half-masks.
FFRs are certified by NIOSH under the 42 CFR 84 respirator certification tests. Certification is no guarantee that the mask will perform well as worn. In one study of FFRs [CDC ], the average dust reduction was only 67%.
Powered air-purifying respirators (PAPRs) use a fan to draw air through the filter to the user. They are easier to breathe through than negative pressure air purifying respirators; however, they need a fully charged battery to work properly. PAPRs have three filter classes HE, PAPR100-N, and PAPR100-P. All three filter series must demonstrate a minimum efficiency level of 99.97 percent. It is important to know what the hazard is, and how much of it is in the air, to select the proper filters/cartridges.
PAPRs are often designed with a hard hat equipped with a battery-powered fan or a belt-worn battery and fan, filtering system, and face visor, thus providing protection for the head, lungs, and eyes and face within one unit. Another advantage is a lack of breathing resistance. Loose-fitting PAPRs have the ability to accommodate facial hair. Tight-fitting facepiece PAPRs are required by OSHA to be fit-tested and worn without facial hair.
The NIOSH Certified Equipment List (CEL) is a useful resource for making a respirator selection. The online CEL tool allows you to define search criteria based on characteristics of approved respirators.
Respirator wearers should follow the manufacturer&#;s instructions. Comfort is as important as a tight seal. A worker may need to try different size respirators or respirators from different manufacturers before finding the best fit for his or her facial structure. Once a respirator is put on, positive and negative pressure seal checks are necessary to ensure there are no leaks that would degrade the respirator&#;s effectiveness.
Basic respirator maintenance is simple. The wearer should check to ensure that the filter cartridges are undamaged, the inhalation and exhalation valves are in working order, no straps are slipping or broken, there are no tears or deformities in the facepiece, and the respirator is reasonably clean.
Regular replacement of filters is an important part of respirator use. Normally, filters should be replaced when breathing resistance increases and when they are damaged or soiled or at the end of the shift if exposed to oil mists. Another approach is to replace filters when the filter loading reaches 200 mg of dust [NIOSH ]. NIOSH has additional guidance on the reuse and extended use of filters: Filtering out Confusion: Frequently Asked Questions about Respiratory Protection, Respirator Reuse and Extended Use.
Many construction tasks can expose workers to hazardous dust. Protect your workers by selecting the appropriate respirator for the job and ensure it is used properly according to the manufacturer&#;s instructions and OSHA&#;s mandates. Keep your workforce safe and healthy.
CAPT Alan Echt, DrPH, CIH, Senior Industrial Hygienist in the NIOSH Office of Construction Safety and Health (retired).
Christopher Coffey, Ph.D, is the former Associate Director for Science for the NIOSH National Personal Protective Technology Laboratory (retired).
Scott Earnest, PhD, PE, CSP, is the Associate Director for Construction Safety and Health.
Jeanette Novakovich, MA, MS, PhD, is a Writer-Editor in the NIOSH Division of Science Integration.
CDR Elizabeth Garza, MPH, CPH, is Assistant Coordinator for the Construction Sector in the NIOSH Office of Construction Safety and Health.
Scott Breloff, Ph.D. is a Biomedical Research Engineer in the NOISH Office of Construction Safety and Health.
Christina Socias-Morales, DrPH, is a Research Epidemiologist in the NIOSH Office of Construction Safety and Health.
Centers for Disease Control and Prevention. Preventing silicosis. [topic page] U.S. Department of Health & Human Services. Centers for Disease Control. https://www.cdc.gov/features/preventing-silicosis/index.html
Doney BC, Miller WE, Hale JM, Syamlal G. Estimation of the number of workers exposed to respirable crystalline silica by industry: Analysis of OSHA compliance data (&#;). Am J Ind Med. ;63:465&#;477. DOI:10./ajim.
ISHN []. ANSI/ASSE Z88.2 &#; practices for respiratory protection. Industrial Safety and Hygiene News. , January. https://www.ishn.com/articles/-ansiasse-z882--practices-for-respiratory-protection
Metzler RW, Johnson JS, Spelce DL, Rehak TR []. What&#;s new in Z88.2 an introduction to ANSI/ASSE Z88.2-, practices for respiratory protection. The Synergist. https://synergist.aiha.org/-whats-new-in-z882
NIOSH []. Filtering out Confusion: Frequently Asked Questions about Respiratory Protection, Respirator Reuse and Extended Use. By Shamblin M., Krah J., and Shaffer R. Pittsburgh, PA: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication &#;128, https://doi.org/10./NIOSHPUB
NIOSH []. Guide to the selection and use of particulate respirators certified under 42 CFR 84. Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 96-101, Jan;1-29. https://www.cdc.gov/niosh/docs/96-101/
NIOSH []. Mining Product: Dust Control Handbook for Industrial Minerals Mining and Processing. Second edition. Pittsburgh, PA: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. -124 (RI ). https://www.cdc.gov/niosh/mining/works/coversheet.html
OSHA []. Assigned protection factors for the revised respiratory protection standard. Washington, DC: U.S. Department of Labor, Occupational Safety and Health Administration. OSHA -02. https://www.osha.gov/Publications/-APF-respirators.html
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