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Sampling and readings

Activity

TABLE 1.-DURATION AND SEQUENCE OF SPECIFIC ACTIVITIES FOR TEST 1, IN MINUTES [42 CFR part 84, subpart H]

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Walks at 4.8 km. (3 miles) per hour Sampling and readings

TABLE 2.-DURATION AND SEQUENCE OF SPECIFIC ACTIVITIES FOR TEST 2, IN MINUTES [42 CFR part 84, subpart H]

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TABLE 2.-DURATION AND SEQUENCE OF SPECIFIC ACTIVITIES FOR TEST 2, IN MINUTES-Continued

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2

2

Sampling and readings........................................

1 Total test time for Test 2 for 2-hour, 3-hour, and 4-hour apparatus is 2 hours.
2 Treadmill shall be inclined 15° from vertical and operated at a speed of 1 foot per second.

TABLE 3.-DURATION AND SEQUENCE OF SPECIFIC ACTIVITIES FOR TEST 3, IN MINUTES

[42 CFR part 84, subpart H]

1 Total test time for Test 3 for 2-hour, 3-hour, and 4-hour apparatus is 2 hours.

2 Perform test No. 3 for 1 hr. apparatus; then perform test No. 1 for 1 hour apparatus.

TABLE 4.-DURATION AND SEQUENCE OF SPECIFIC ACTIVITIES FOR TEST 4, IN MINUTES

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'Treadmill shall be inclined 15° from vertical and operated at a speed of 30 cm. (1 foot) per second.

1

1

1

2 times in 3 minutes. 60 times in 5 minutes.

4 times in 6

6 times in 9

minutes. 30 times in 2 minutes.

minutes.

36 times in 3 minutes.

22

60 times in 5 minutes.

60 times in 5 minutes.

2 Perform test No. 1 for 30-minute apparatus; then perform test No. 4 for 1-hour apparatus; then perform test No. 1 for 30-minute apparatus.

* Perform test No. 1 for 1-hour apparatus; then perform test No. 4 for 1-hour apparatus; then perform test No. 1 for 1-hour apparatus.

* Perform test No. 1 for 1-hour apparatus; then perform test No. 4 for 1-hour apparatus; then perform test No. 1 for 1-hour apparatus twice (i.e., two one-hour tests).

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(1) Front-mounted or back-mounted gas mask. A gas mask which consists of a full facepiece, a breathing tube, a canister at the front or back, a canister harness, and associated connections.

(2) Chin-style gas mask. A gas mask which consists of a full facepiece, a canister which is usually attached to the facepiece, and associated connections.

(3) Escape gas mask. A gas mask designed for use during escape only from hazardous atmospheres which consists of a facepiece or mouthpiece, a canister, and associated connections.

(b) Gas masks shall be further described according to the types of gases or vapors against which they are designed to provide respiratory protection, as follows:

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Combination of two or more of the above gaserati and vapors. 1234

1 Approval may be for acid gases or orgar: vapors as a class or for specific acid gasest organic vapors.

2 Not for use against gases or vapors w poor warning properties (except where MS or Occupational Safety and Health Administ tion standards permit such use for a speci gas or vapor), or those which generate hi heats or reaction with sorbent materials in t canister.

3 Use of the gas mask may be limited by fa tors such as lower explosive limit, toxicologi effects, and facepiece fit. Limitations on g mask service life and sorbent capacity limi tions shall be specified by the applicant in structions for selection, use and maintenan of the gas mask.

* Eye protection may be required in certs concentrations of gases and vapors.

(c) Gas masks for respiratory prote tion against gases and vapors oth than those specified in paragraph (b) this section, may be approved up submittal of an application in writi for approval to the Certification a Quality Assurance Branch listing t gas or vapor and suggested maximu use concentration for the specific tyl of gas mask. The Institute will co sider the application and accept or r ject it on the basis of effect on the wearer's health and safety and an field experience in use of gas masks fo such exposures. If the application is ac cepted, the Institute will test such be masks in accordance with the require ments of this subpart.

§84.111 Gas masks; required compo

nents.

(a) Each gas mask described ir §84.110 shall, where its design requires, contain the following component parts. (1) Facepiece or mouthpiece and noseclip;

(2) Canister or cartridge;

(3) Canister harness;

(4) External check valve; and

(5) Breathing tube.

(b) The components of each gas mask shall meet the minimum construction requirements set forth in subpart G of this part.

Organic vapor 1234

Other gas(s) and vapor(s) 1234

184.112 Canisters and cartridges in parallel; resistance requirements. Where two or more canisters or cartridges are used in parallel, their resistance to airflow shall be essentially equal.

184.113 Canisters and cartridges; color and markings; requirements. The color and markings of all canisters and cartridges or labels shall conform with the requirements of the American National Standards Institute, American National Standard for Identification of Air-Purifying Respirator Canisters and Cartridges, ANSI K13.1-1973. ANSI K13.1 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.

(84.114 Filters used with canisters and cartridges; location; replacement.

(a) Particulate matter filters used in conjunction with a canister or cartridge shall be located on the inlet side of the canister or cartridge.

(b) Filters shall be incorporated in or firmly attached to the canister or cartridge and each filter assembly shall, where applicable, be designed to permit its easy removal from and replacement in the canister or cartridge.

184.115 Breathing tubes; minimum requirements.

Flexible breathing tubes used in conjunction with gas masks shall be designed and constructed to prevent:

(a) Restriction of free head movement;

(b) Disturbance of the fit of facepieces or mouthpieces;

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

(d) Shutoff of airflow due to kinking, or from chin or arm pressure.

$84.116 Harnesses; installation and construction; minimum requirements.

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

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

$84.117 Gas mask containers; minimum requirements.

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

(b) Containers for gas masks shall be designed and constructed to permit easy removal of the mask.

$84.118 Half-mask facepieces,

full

facepieces, and mouthpieces; 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 gas mask.

(c) Half-mask facepieces shall not interfere with the fit of common industrial safety spectacles, as determined by the Institute's facepiece tests in § 84.124.

(d) Gas masks with mouthpieces shall be equipped with noseclips which are securely attached to the mouthpiece or gas mask and provide an airtight seal.

(e) Facepieces shall be designed to prevent eyepiece fogging.

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