42 CFR 84.1144 - Silica dust test for dust, fume, and mist respirators; single-use or reusable filters; minimum requirements.

Status message

There are 3 Updates appearing in the Federal Register for 42 CFR Part 84. View below or at eCFR (GPOAccess)
§ 84.1144 Silica dust test for dust, fume, and mist respirators; single-use or reusable filters; minimum requirements.
(a) Three non-powered respirators with single-use filters will be tested for periods of 90 minutes each at a continuous airflow rate of 32 liters per minute.
(b) The relative humidity in the test chamber will be 20-80 percent, and the room temperature approximately 25 °C.
(c) The test suspension in the chamber will not be less than 50 nor more than 60 milligrams of flint (99 percent free silica) per cubic meter of air.
(d) The flint in suspension will be ground to pass 99 percent through a 270-mesh sieve.
(e) The particle-size distribution of the test suspension will have a geometric mean of 0.4 to 0.6 micrometer, and the standard geometric deviation will not exceed 2.
(f) The total amount of unretained test suspension in samples taken during testing shall not exceed 1.5 milligrams for a non-powered air-purifying respirator.
(g) Three non-powered respirators with reusable filters will be tested and shall meet the requirements specified in paragraphs (a) through (f) of this section; each filter shall be tested three times: Once as received; once after cleaning; and once after recleaning. The applicant's instructions shall be followed for each cleaning.

Title 42 published on 2014-10-01.

The following are only the Rules published in the Federal Register after the published date of Title 42.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2015-01-29; vol. 80 # 19 - Thursday, January 29, 2015
    1. 80 FR - Respirator Certification Fees
      GPO FDSys XML | Text
      DEPARTMENT OF HEALTH AND HUMAN SERVICES
      42 CFR Part 84

This is a list of United States Code sections, Statutes at Large, Public Laws, and Presidential Documents, which provide rulemaking authority for this CFR Part.

This list is taken from the Parallel Table of Authorities and Rules provided by GPO [Government Printing Office].

It is not guaranteed to be accurate or up-to-date, though we do refresh the database weekly. More limitations on accuracy are described at the GPO site.


United States Code
U.S. Code: Title 29 - LABOR
U.S. Code: Title 30 - MINERAL LANDS AND MINING

Title 42 published on 2014-10-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 42 CFR Part 84 after this date.

  • 2015-01-29; vol. 80 # 19 - Thursday, January 29, 2015
    1. 80 FR - Respirator Certification Fees
      GPO FDSys XML | Text
      DEPARTMENT OF HEALTH AND HUMAN SERVICES
      42 CFR Part 84