PART 33--DUST COLLECTORS FOR USE IN CONNECTION WITH ROCK DRILLING IN COAL MINES
Section
33.1 Purpose.
33.2 Definitions.
33.3 Consultation.
33.4 Types of dust collectors for which certificates of approval may be granted.
33.5 [Reserved]
33.6 Applications.
33.7 Date for conducting tests.
33.8 Conduct of investigations, tests, and demonstrations.
33.9 Certification of dust-collecting systems.
33.10 Certificates of approval or performance.
33.11 Approval plates.
33.12 Changes after certification.
33.13 Withdrawal of certification.
Subpart B--Dust-Collector Requirements
33.20 Design and construction.
33.21 Modification of test equipment.
33.22 Mode of use.
33.23 Mechanical positioning of parts.
33.30 Test site.
33.31 Test space.
33.32 Determination of dust concentration.
33.33 Allowable limits of dust concentration.
33.34 Drilling test.
33.35 Methods of drilling; dust-collector unit.
33.36 Method of drilling; combination unit or dust-collecting system.
33.37 Test procedure.
33.38 Electrical parts.
AUTHORITY: 30 U.S.C. 957 , 961 .
SOURCE: Schedule 25B, 25 FR 6473, July 9, 1960, unless otherwise noted.
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