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TABLES TO SUBPART OF PART 84

TABLE 5.-CANISTER BENCH TESTS AND REQUIREMENTS FOR FRONT-MOUNTED AND BACK-MOUNTED GAS MASK CANISTERS

(42 CFR part 84, subpart 1]

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Test atmosphere

Maximum

Minimum
allowable

Number
Canister type

service
Test condition
Concentra-

penetratin
Flow rate

of tests
Gas or vapor tion (parts

lite (min-
(liters per

(parts per
per million) minute)

million)

utes)
Acid gas

As received

SO2

20,000
64

12
Equilibrated

20,000
64

12 SO2

20,000
32

12
Cl2
20,000

12
Organic vapor

As received

CCIA

20,000
64

12
Equilibrated

CCL

20,000
32

12
Ammonia

As received

NH3

30,000 64

12 Equilibrated

ΝΗ,

30,000
32

12
Carbon monoxide

As received
20,000 464

60
Equilibrated

5,000
232

3
(3)

60
3,000

3
()

60
Combination of 2 or 3 of above types 5
Combination of all above types 6

Minimum life will be determined at the indicated penetration.
2 Relative humidity of test atmosphere will be 95+3pct; temperature of test atmosphere will be 25+2.5° C.
3 Maximum allowable CO penetration will be 385 cm 3 during the minimum life. The penetration shall not exceed 500 p/m during this time.
* Relative humidity of test atmosphere will be 95t3pct; temperature of test atmosphere entering the test fixture will be 0+2.5°C -0°C.
5 Test conditions and requirements will be applicable as shown in this table.
• Test conditions and requirements will be applicable as shown in this table, except the minimum service lives for acid gas, organic vapor, and ammonia will be 6 min instead of 12 min.

TABLE 6_Canister Bench Tests and Requirements for Chin-Style Gas Mask Canisters

[42 CFR part 84, subpart 1]

232

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TABLE 6 Canister Bench Tests and Requirements for Chin-Style Gas Mask Canisters

(42 CFR part 84, subpart 1]

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888

432

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As received Equili- NH,

5,000 32

50

12
brated
Carbon monoxide

As received
20,000 264

60
5,000

60
3,000
232

60
Combination of 2 or 3 of above types
Combination of all above types 6

Minimum life will be determined at the indicated penetration.
2 Relative humidity of test atmosphere will be 95 † 3pct; temperature of test atmosphere will be 25 I 2.5° C.
3 Maximum allowable CO penetration will be 385 cm 3 during the minimum life. The penetration shall not exceed 500 p/m during this time.
* Relative humidity of test atmosphere will be 95 3pct; temperature of test atmosphere entering the test fixture will be 0 32.5C -0°C.
5 Test conditions and requirements will be applicable as shown in this table.
6 Test conditions and requirements will be applicable as shown in this table, except the minimum service lives for acid gas, organic vapor, and ammonia will be 6 min instead of 12 min.

3

TABLE 7.-CANISTER BENCH TESTS AND REQUIREMENTS FOR ESCAPE GAS MASK CANISTERS

(42 CFR part 84, subpart 1]

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Acid gas

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As received

SO2

5,000 Equilibrated

Cl2

5,000 SO2

5,000 Cl2

5,000 Organic vapor

As received

CCL

5,000
Equilibrated

CCla

5,000
Ammonia

As received

ΝΗ,

5,000
Equilibrated

NH3

5,000
Carbon monoxide

As received

10,000

5,000
CO

3,000
Minimum life will be determined at the indicated penetration.
2 Relative humidity of test atmosphere will be 95 13pct; temperature of test atmosphere will be 25+2.5° C.
3 Maximum allowable CO penetration will be 385 cm 3 during the minimum life. The penetration shall not exceed 500 p/m during this time.
*If affluent temperature exceeds 100° C during this test, the escape gas mask shall be equipped with an effective heat exchanger,
5 Relative humidity of test atmosphere will be 953 pct; temperature of test atmosphere entering the test fixture will be 0+2.5° C_0° C.

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64 32 232 532 232

with the wearer's vision and permit easy access to the external surface of such window(s) for cleaning.

(e) Type Csupplied-air respirators. An airline respirator, for entry into and escape from atmospheres not immediately dangerous to life or health, which consists of a source of respirable breathing air, a hose, a detachable coupling, a control valve, orifice, a demand valve or pressure demand valve, an arrangement for attaching the hose to the wearer, and a facepiece, hood, or helmet.

(f) Type CEsupplied-air respirators. A type “C” supplied-air respirator equipped with additional devices designed to protect the wearer's head and neck against impact and abrasion from rebounding abrasive material, and with shielding material such as plastic, glass, woven wire, sheet metal, or other suitable material to protect the window(s) of facepieces, hoods, and helmets which do not unduly interfere with the wearer's vision and permit easy access to the external surface of such window(s) for cleaning.

Subpart Supplied-Air

Respirators $ 84.130 Supplied-air respirators; de

scription. Supplied-air respirators, including all completely assembled respirators designed for use as respiratory protection during entry into and escape from atmospheres not immediately dangerous to life or health are described as follows:

(a) Type Asupplied-air respirators. A hose mask respirator, for entry into and escape from atmospheres not immediately dangerous to life or health, which consists of a motor-driven or hand-operated blower that permits the free entrance of air when the blower is not operating, a strong large-diameter hose having a low resistance to airflow, a harness to which the hose and the life-line are attached and a tight-fitting facepiece.

(b) Type AEsupplied-air respirators. A Type “A” supplied-air respirator equipped with additional devices designed to protect the wearer's head and neck against impact and abrasion from rebounding abrasive material, and with shielding material such as plastic, glass, woven wire, sheet metal, other suitable material to protect the window(s) of facepieces, hoods, and helmets which do not unduly interfere with the wearer's vision and permit easy access to the external surface of such window(s) for cleaning.

(c) Type Bsupplied-air respirators. A hose mask respirator, for entry into and escape from atmospheres not immediately dangerous to life or health, which consists of a strong large-diameter hose with low resistance to airflow through which the user draws inspired air by means of his lungs alone, a harness to which the hose is attached, and a tight-fitting facepiece.

(d) Type BEsupplied-air respirators. A type “B” supplied-air respirator equipped with additional devices designed to protect the wearer's head and neck against impact and abrasion from rebounding abrasive material, and with shielding material such as plastic, glass, woven wire, sheet metal, other suitable material to protect the window(s) of facepieces, hoods, and helmets which do not unduly interfere

or

$84.131 Supplied-air respirators; re

quired components. (a) Each supplied-air respirator described in $84.130 shall, where its design requires, contain the following component parts:

(1) Facepiece, hood, or helmet;

(2) Air supply valve, orifice, or demand or pressure-demand regulator;

(3) Hand operated or motor driven air blower;

(4) Air supply hose;
(5) Detachable couplings;
(6) Flexible breathing tube; and
(7) Respirator harness.

(b) The component parts of each supplied-air respirator shall meet the minimum construction requirements set forth in subpart G of this part.

8 84.132 Breathing tubes; minimum re

quirements. Flexible breathing tubes used in conjunction with supplied-air respirators shall be designed and constructed to prevent:

(a) Restriction of free head movement;

or

(b) Disturbance of the fit of facepieces, mouthpieces, hoods, or helmets;

(c) Interference with the wearer's activities; and

(d) Shutoff of airflow due to kinking, or from chin or arm pressure. $ 84.133 Harnesses; installation and

construction; minimum require

ments. (a) Each supplied-air respirator shall, where necessary, be equipped with a suitable harness designed and constructed to hold the components of the respirator in position against the wearer's body.

(b) Harnesses shall be designed and constructed to nit easy removal and replacement of respirator parts, and where applicable, provide for holding a full facepiece in the ready position when not in use.

8 84.136 Facepieces, hoods, and hel

mets; eyepieces; minimum require

ments. (a) Facepieces, hoods, and helmets shall be designed and constructed to provide adequate vision which is not distorted by the eyepiece.

(b) All eyepieces except those on Types B, BE, C, and CE supplied-air respirators shall be designed and constructed to be impact and penetration resistant. Federal Specification, Mask, Air Line: and Respirator, Air Filtering, Industrial, GGG-M–125d, October 11, 1965 with interim amendment-1, July 30, 1969, is an example of an appropriate standard for determining impact and penetration resistance. Copies of GGG M-125d may be obtained from the NIOSH, Certification and Quality Assurance Branch, 1095 Willowdale Road, Morgantown, WV 26505–2888.

(c)(1) The eyepieces of AE, BE, and CE type supplied-air respirators shall be shielded by plastic, glass, woven wire, sheet metal, or other suitable material which does not interfere with the vision of the wearer.

(2) Shields shall be mounted and attached to the facepiece to provide easy access to the external surface of the eyepiece for cleaning.

8 84.134 Respirator containers; min

imum requirements. Supplied-air respirators shall

be equipped with a substantial, durable container bearing markings which show the applicant's name, the type and commercial designation of the respirator it contains, and all appropriate approval labels.

8 84.135 Half-mask facepieces, full

facepieces, hoods, and helmets; fit;

minimum requirements. (a) Half-mask facepieces and full facepieces shall be designed and constructed to fit persons with various facial shapes and sizes either:

(1) By providing more than one facepiece size; or

(2) By providing one facepiece size which will fit varying facial shapes and sizes.

(b) Full facepieces shall provide for optional use of corrective spectacles or lenses, which shall not reduce the respiratory protective qualities of the respirator.

(c) Hoods and helmets shall be designed and constructed to fit persons with various head sizes, provide for the optional use of corrective spectacles or lenses, and insure against any restriction of movement by the wearer.

(d) Facepieces, hoods, and helmets shall be designed to prevent eyepiece fogging.

8 84.137 Inhalation and exhalation

valves; check valves; minimum re

quirements. (a) Inhalation and exhalation valves shall be provided where necessary and protected against distortion.

(b) Exhalation valves shall be:

(1) Protected against damage and external influence; and

(2) Designed and constructed to prevent inward leakage of contaminated air.

(c) Check valves designed and constructed to allow airflow toward the facepiece only shall be provided in the connections to the facepiece or in the hose fitting near the facepiece of all Type A, AE, B, and BE supplied-air respirators.

$84.138 Head harnesses; minimum re

quirements. Facepieces shall be equipped with adjustable and replaceable head harnesses which are designed and constructed to provide adequate tension

during use, and an even distribution of pressure over the entire area in contact with the face.

$ 84.139 Head and neck protection;

supplied-air respirators; minimum

requirements. Type AE, BE, and CE supplied-air respirators shall be designed and constructed to provide protection against impact and abrasion from rebounding abrasive materials to the wearer's head and neck.

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8 84.140 Air velocity and noise levels;

hoods and helmets; minimum re

quirements. Noise levels generated by the respirator will be measured inside the hood or helmet at maximum airflow obtainable within pressure and hose length requirements and shall not exceed 80 dBA.

8 84.142 Air supply source; hand-oper.

ated or motor driven air blowers; Type A supplied-air respirators; minimum requirements. (a) Blowers shall be designed and constructed to deliver an adequate amount of air to the wearer with either direction of rotation, unless constructed to permit rotation in one direction only, and to permit the free entrance of air to the hose when the blower is not operated.

(b) No multiple systems, whereby more than one user is supplied by one blower, will be approved, unless each hose line is connected directly to a manifold at the blower.

$ 84.141 Breathing gas; minimum re

quirements. (a) Breathing gas used to supply supplied-air respirators shall be respirable breathing air and contain no less than 19.5 volume-percent of oxygen.

(b) Compressed, gaseous breathing air shall meet the applicable minimum grade requirements for Type I gaseous air set forth in the Compressed Gas Association Commodity Specification for Air, G-7.1, 1966 (Grade D or higher quality). G–7.1 is incorporated by reference and has been approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from American National Standards Institute, Inc., 1430 Broadway, New York, NY 10018. Copies may be inspected at the NIOSH, Certification and Quality Assurance Branch, 1095 Willowdale Road, Morgantown, WV 26505-2888, or at the Office of the Federal Register, 800 North Capitol Street, NW., suite 700, Washington, DC.

(c) Compressed, liquefied breathing air shall meet the applicable minimum grade requirements for Type II liquid air set forth in the Compressed Gas Association Commodity Specification for Air, G-7.1, 1966 (Grade B or higher quality). G–7.1 is incorporated by reference and has been approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51.

8 84.143 Terminal fittings or chambers;

Type B supplied-air respirators;

minimum requirements. (a) Blowers or connections to air supplies providing positive pressures shall not be approved for use on Type B supplied-air respirators.

(b) Terminal fittings or chambers employed in Type B supplied-air respirators, shall be:

(1) Installed in the inlet of the hose.

(2) Designed and constructed to provide for the drawing of air through corrosion resistant material arranged so as to be capable of removing material larger than 0.149 mm. in diameter (149 micrometers, 100-mesh, U.S. Standard sieve).

(3) Installed to provide a means for fastening or anchoring the fitting or chamber in a fixed position in a zone of respirable air.

$ 84.144 Hand-operated blower test;

minimum requirements. (a) Hand-operated blowers shall be tested by attaching them to a mechanical drive and operating them 6 to 8 hours daily for a period of 100 hours at a speed necessary to deliver 50 liters of

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