Respirator types

Medically evaluating, training, qualifying, and fit-testing workers for specific respirator types, checking 29 CFR 1910, Subpart Z, Toxic and Hazardous Substances, for any special respiratory protection requirements (e.g., for asbestos, lead, or cadmium) [3]... 

TABLE 15. Guide for Selection of Respirators Type of respirator... 

Preparation of capsules (working with solid substances) with class 5 substances requires apart from working in a safety cabinet the wearing of a respirator type P3, or should be performed in an isolator (positive or negative pressure) (see Sect. 28.3.7). 

D) The date of the most recent fit testing, the name and social security number of each tested employee, and the respirator type and facepiece selected. 

The basic purpose of any respirator is, simply, to protect the respiratory system from inhalation of hazardous atmospheres. Respirators provide protection either by removing contaminants from the air before it is inhaled or by supplying an independent source of respirable air. The principal classifications of respirator types are based on these categories. 

Protection factors are criteria used in determining what limiting concentrations are to be permitted for each respirator type that will afford adequate protection to the wearer. The referenced Subparts of 30 CFR 11 give technical descriptions concerning each type or class of respirators referenced in the decision logic. 30 CFR 11 should be used with the decision logic to properly understand the criteria for the specification of allowable respirators. 

This value must be less than the NPF for the respirator type under consideration. Other limitations may apply. Includ-... 

In all of the process operations except venting and flaring, exposure is related to worker activity, and to some extent is dependent on worker behavior and the work practices appHed. The distinction between those exposures that are impacted by worker behavior and those that, barring the use of respirators, are not is important. The types of control methods to be appHed and the methods of exposure measurement to be used are influenced by this difference. 

Barium metal and most barium compounds are highly poisonous. A notable exception is barium sulfate which is nontoxic because of its extreme iasolubihty ia water. Barium ion acts as a muscle stimulant and can cause death through ventricular fibrillation of the heart. Therefore, care must be taken to avoid contact with open areas of the skin. Workers must wear respirators (of type approved for toxic airborne particles), goggles, gloves, and protective clothing at all times. The toxic barium aluminate residue obtained from barium production is detoxified by reaction with a solution of ferrous sulfate and converted iato nontoxic barium sulfate. According to OSHA standards, the TWA value for Ba and Ba compounds ia air is 0.5 mg/m. ... 

Because a filter sample includes particles both larger and smaller than those retained in the human respiratory system (see Chapter 7, Section III), other types of samplers are used which allow measurement of the size ranges of particles retained in the respiratory system. Some of these are called dichotomous samplers because they allow separate measurement of the respirable and nonrespirable fractions of the total. Size-selective samplers rely on impactors, miniature cyclones, and other means. The United States has selected the size fraction below an aerodynamic diameter of 10 /xm (PMiq) for compliance with the air quality standard for airborne particulate matter. 

Eye protection specific provision for various duties Respirators specific types for different applications... 

Respirators for gases and vapours eomprise a faeepieee and a eontainer filled with a speeifie adsorbent for the eontaminant. Care must be taken to seleet the eoiTeet type. More than one eanister ean be attaehed. 

---