NIOSH had since approved respirators other than “continuous flow air-line” respirators for use in abrasive blasting operations, and so OSHA’s change of this definition made a wider range of respiratory protection available to employers.
57(f)(5)(i), which require that only respirators approved by NIOSH be used for abrasive blasting operations. You should also know that the definition of Type CE or “abrasive blasting respirators” was changed by OSHA in the Ventilation standards to remove the phrase “continuous flow air-line.” 63 Fed.
Representative of the work environment without taking credit for respiratory protection.Collected outside of the abrasive-blasting unit’s shroud in operator’s breathing zone (Note: The sampling cassette should be positioned as close as possible to the employee’s nose and mouth, i.e., in a hemisphere forward of the shoulders within a radius of 6 to 9 inches).Personal sample(s) analyzed utilizing accepted methodologies.The exposure will not exceed the PELs.In order to be excluded from the standard described above, 1910.94(a)(5)(ii)( c), where NIOSH-approved respiratory protection is required, the employer must demonstrate compliance with each of the following criteria: Particular to the situation you describe, NIOSH-approved abrasive blasting respirators would be required only “(w)here the concentration of toxic dust dispersed may exceed the limits set in § 1910.1000 and the nozzle and blast are not physically separated from the operator in an exhaust-ventilated enclosure.”. 57 for construction, specify the workplace conditions where NIOSH-approved abrasive blasting respirators are required. Question: Is a Type CE continuous-flow supplied-air respirator required when performing wet abrasive blasting where concentrations of toxic dust do not exceed the permissible exposure limits (PELs) in. You referenced several anecdotal studies performed using these machines, some of which provided definitive instructions on the use of Type CE continuous flow supplied-air respirators, while others were vague on the requirement. The redesigned systems offer a reduction of dust from blast operations.
After a background summary, your paraphrased question and our response are below.īackground: Clemco and other manufacturers have designed or redesigned wet abrasive blast systems and are marketing them as “vapor- or wet-abrasive blast machines.” You’d like to know if OSHA requires operators who use these redesigned abrasive blast systems to wear Type CE respirators, as approved by the National Institute for Occupational Safety and Health (NIOSH). This letter constitutes OSHA's interpretation only of the requirements discussed and may not be applicable to any question not delineated within your original correspondence.
94, when using vapor- or wet-abrasive blast machines. You requested an explanation of the appropriate respiratory protection required by the OSHA Ventilation standard. Your letter was forwarded to the Directorate of Enforcement Programs for a response. Thank you for your April 7, 2015, letter to the Occupational Safety and Health Administration (OSHA).
0 kommentar(er)
