PART 33--DUST COLLECTORS FOR USE IN CONNECTION WITH ROCK DRILLING IN COAL MINES
Subpart A--General Provisions
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.
Subpart C--Test Requirements
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.