Part 33 - Dust Collectors for Use in Connection With Rock Drilling in Coal Mines  


Subpart A - General Provisions
§ 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 - Application procedures and requirements.
§ 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.